郑州大学c语言实验报告册答案

实验ー1、#include<stdio.h>voidmain()(inta,b,c;scanf(z/%d,%d,%d",&a,&b,&c);printf("sum=%d\n,a+b+c);}2、#include<stdio.h>voidmain()(inta,b,he,cha,ji,shang;scanf("%d,%d〃,&a,&b);he=a+b;cha=a-b;ji=a*b;shang=a/b;printf("he=%d\n”,he);printf("cha=%d\n,cha);printf("ji=%d\n”,ji);printf("shang=%d\n”,shang);}3、ttinclude<stdio.h>voidmain()(inta,b,c,d,e,sum;scanf(，z%d,%d,%d,%d,%d〃,&a,&b,&c,&d,&e);sum=a*a+b*b+c*c+d*d+e*e;printf("sum=%d\n”,sum);)4#include<stdio.h>include<math.h>voidmain()doublea,b,c,sum;scanf(，z%lf,%lf,%ir,&a,&b,&c);sum=sqrt(a)+sqrt(b)+sqrt(c);printfCsum=%f\n”,sum);5、#include<stdio.h>ttdefinePI3.14159voidmain(){floatr,1,s;printf(〃请输入圆半径(r):〃);scanf("%f",&r);l=2*PI*r;s=r*r*PI;1=%6.2f\n",1);1=%6.2f\n",1);6、#include<stdio.h>voidmain(){printf("ヽ"whatabeautifulcampus!\"\n");printf("\"Iwishyoueverysuccess!ヽ"\n");)实验二1、ttinclude<stdio.h>voidmain(){inta,b,c;floatx;scanf("a=%d,b=%d,c=%d,x=%f",&a,&b,&c,&x);printf("%f",a*x*x*x+b*x*x+c);)2^#include<stdio.h>voidmain()(inta,b;scanf("a=%d,b=%d",&a,&b);printf(z/ji=%d,shang=%d,yushu=%d”,a*b,a/b,a%b);}3、#include<stdio.h>voidmain(){floatc,f;printf("请输入一个华氏温度f:;scanf&f);c=5.0/9.0*(f-32);printf("\n摄氏温度为:%5.2f\n",c);)ttinclude<stdio.h>ttdefinePI3.14159voidmain()(floatr,1,s;printf("请输入圆半径(r);scanf("賦”,&r);l=2*Pl*r;s=r*r*Pl;printf("圆面积 s=%6.2f\n",s);)#include<stdio.h>voidmain()(floatc=3.123456789;printf('%f”,c);Winclude<stdio.h>voidmain()(inta-2;a+=a;printf("%d\n,a);a-=2;printf("%d\n",a);a*=2+3;printf("%d\n",a);a/=a+a;printf("%d\n",a);实验三ttinclude<stdio.h>voidmain()(inta=3,b=4,c=5;floatx=l.414,y=l.732,z=2.712;printf("a=%-7db=%-7dc=%-7d\nx=%-7.3fy=%-7.3fz=%-7.3f”,a,b,c,x,y,z);)2、ttinclude<stdio.h>voidmain()(inta,b,c;floatx,y,z;scanf1‘%d",&a);scanf("%d",&b);scanf("%d",&c);scanf("%f",&x);scanf("%f",&y);scanf("%f",&z);printf("a=%d,b=%d,c=%d\nx=%.3f,y=%.3f,z=%.3f,\n",a,b,c,x,y,z);3、Winclude<stdio.h>voidmain()(inta,b,c,xl,x2;scanf("%d,%d,%d",&a,&b,&c);xl=a+b+c;x2=a-b-c;printf("xl=a+b+c=%d+%d+%d=%d\n”,a,b,c,xl);printf("x2=a-b-c=%d-%d-%d=%d\n”,a,b,c,x2);)4、ttinclude<stdio.h>voidmain()(charcl,c2,c3,c4;scanf("%c%c%c%c”,&cl,&c2,&c3,&c4);printfC%d,%d,%d,%d”,cl,c2,c3,c4);)5、ttinclude<stdio.h>voidmain()intdl=60,d2=61,d3=62,d4=63;printf("%c,%c,%c,%c”,dl+5,d2+5,d3+5,d4+5);}6、#include<stdio.h>voidmain()(intm=12345678,n=3456789;printf("m=%dn=%d”,m,n);)ttinclude<stdio.h>voidmain()(inta=20,b=64,c=127;printf("a=%d,%o,%x\n”,a,a,a);printf("b=%d,%o,%x\n”,b,b,b);printf("c=%d,%o,%x\n”,c,c,c);)8、ttinclude<stdio.h>voidmain()(floatx,y,z;x-1.414;y-1.732;z=2.712;printfC%6.2f,%6.2f,%6.2f”,x,y,z);)9、ttinclude<stdio.h>voidmain()(printfC%.1.0/3);}10、ttinclude<stdio.h>voidmain()(inta,b,a=getchar(b=getchar()c=getchar();a=a+32;b=b+32;c=c+32;putchar(a);putchar(b);putchar(c);)实验四选择结构程序设计.有三个整数a,b,c, 由键盘输入,输出其中最大的数。参考程序main(){inta,b,c,max;printf("请输入a,b,c=");scanf("%d,%d,%d",&a,&b,&c);max=a;if(max<b)max=b;if(max<c)max=c;printf("\n最大数max=%d\n”,max);).参看《C程序设计》第三版谭浩强第108页的例5.6.3,有一函数:写・ー程序,输入x,输出y〇main(){floatx,y;printf("请输入x=");scanf("%f",&x);if(x<l)y=x;elseif(x<10)y=2*xT;elsey=3*xTl;printfC?\nx=%fy=%f\n”,x,y);■}4.给出ー百分制成绩,要求输出成绩等级:90分以上为‘A';80〜89分为，B，;7〇〜79分为/C;60〜69分以上为，D';60分以下为，E参考程序1main(){ints;charr;printf("请输入score=")；scanf("%d",&s);if(s>=90) r='A';elseif(s>=80) r='B';elseif(s>=70)r='C';elseif(s>=60)r=/Dz;elser=,E';printf("\nscore=%dresult=%c\n",s,r);)参考程序2main(){ints,i;charr;printf("请输入score:")；scanf("%d",&s);i-(s-s%10)/10;switch(i){case10:case9:r='A，;break;case8:r='B，;break;case7:r='C，;break;case6:r='D，;break;default:r-'E';printf("\nscore=%dresult=%c\n",s,r);5.企业发放奖金1根据利润提成,以下是提成办法:ト=10万部分10%10くIく=20万部分7.5%20くIく=40万部分5%40くIく=60万部分3%60くIく=100万部分1.5%I>100万部分1%从键盘输入当月利润I,求应发奖金总数。要求:①用if语句编程序;②用switch语句编程序。参考程序1main()(floatbl,b2,b3,b4,b5,b6,I;printf(〃请输入本月利润:“)；scanf&1);bl=b2=b3=b4=b5=b6=0;if(I>100){b6=(1-100)*0.01;b5=40*0.015;b4=2〇・〇.03;b3=2〇・〇.05;b2=l〇・〇.075;bl=10*0.1;)elseif(I>60){b5=(-60)*0.015;b4=2〇・〇.03;b3=2〇・〇.05;b2=10*0.075;bl=10*0.1;}elseif(I>40){b4=(I-40)*0.03;b3=20*0.05;b2=l〇・〇.075;bl=10*0.1;}elseif(I>20){b3=(I-20)*0.05;b2=10*0.075;bl=10*0.1;)elseif(I>10){b2=(『10)*0.075;bl=10*0.1;)elsebl=I*O.1;printf("\n本月利润I=%f万元；奖金b=%f万元、n”,1,bl+b2+b3+b4+b5+b6);)floatbl,b2,b3,b4,b5,b6,I,B;printf(〃请输入本月利润:〃)；scanf&1);B=0;b6=(1-100)*0.01;b5=4〇・〇.015;b4=2〇・〇.03;b3=2〇・〇.05;b2=l〇・〇.075;bl=10*0.1;if(I>100) B+=bl+b2+b3+b4+b5+b6;elseif(I>60) B+=(1-60)*0.015+b4+b3+b2+bl;elseif(I>40) B+=(I-40)*0.03+b3+b2+bl;elseif(I>20) B+=(l-20)*0.05+b2+blelseif(I>10) B+=(1-10)*0.075+bl;elseB=1*O.1;printf("\n本月利润I=%f万元;奖金B=%f万元、n”,I,B);)floatbl,b2,b3,b4,b5,b6,I,B;intn;printf(〃请输入本月利润:〃)；scanf(訣f",&I);B=0;b6=(1-100)*0.01;b5=40*0.015;b4=2〇・〇.03;b3=2〇・〇.05;b2=l〇・〇.075;bl=10*0.1;n=i/10;switch(n){case0:B=l+O.1;break;B+=(I-10)*0.075+bl;break;B+=(I-20)*0.05+b2+bl;break;B+=(1-40)*0.03+b3+b2+bl;break;B+=(I-60)*0.015+b4+b3+b2+bl;break;default:B+=bl+b2+b3+b4+b5+b6;}printf("\n本月利润I=%f万元;奖金B=%f万元、n”,I,B);6.给ー个不多于5位的正整数,要求:①求出它是几位数;②分别打印出每一位数字;③按逆序打main。(intnl,n2,n3,n4,n5,n;longnum;printf("请输入0--99999之间的ー个数:“)；scanf("%ld",&num);if(num>9999)n=5;elseif(num>999)n=4;elseif(num>99)n=3;elseif(num>9)n=2;elsen=l;n3=num/100%10; /・取百位・/n4=num/10%10; /・取十位・/n5=num%10; /・取个位・/printf(z，\n原数据num=%ld\n",num);printf(z,反序数为:")；switch(n){case1:printf("%d\n",n5);break;printf("%d%d\n,n5,n4);break;printf(，/%d%d%d\n，/,n5,n4,n3);break;printf("%d%d%d%d\n”,n5,n4,n3,n2);break;printf(，，%d%d%d%d%d\n，，>n5,n4,n3,n2,nl);break;nl=num/10000; /*取万位*/n2=num/1000%10; /・取千位・/［转］郑州大学09级C语言实验报告答案(实验5——实验!4)转载自真诚★相约 转载于2010年05月05日17:16阅读(3)评论(0)分类:大学生活举报实验五循环(一)1、参看谭浩强(第三版)P114-1152、main(){inti,j;for(i=l;i<ll;i++){for(j=l;jく=40-i;j++) printf(，z ");for(j=l;j<=2*i-l;j++) printf('%d”,iT)；printf('\n");}3、main(){intp=l; /・说明符号位・/longn;floatt=l.0/3.0,sum=lT.0/3.0;for(n=3; t>=l.Oe-5; n++){t=l.0/(n*n+l);sum=sum+p*t; p=-p;}printf('\nsum=%f\n,sum);))4^main(){charc;intk;intnl=0,al=0,ul=0; /・分别存放数字、字母及其它字符个数・/printf('\nInput30chars:z/);for(k=l;kく=30;k++){scanf("祝",&c);if(c>='A'&&cく='Z'IIc>='a'&&cく='z') al++;elseif(c>=’〇'&&c<='9') nl++;elseul++;printf(z/\n 〇〜9=%d;A〜Za〜z=%d;otherwise=%d\nz/,nl,al,u1)；}5、main(){inti;longintfl,f2;fl=0;f2=l;for(i=l;iく=10;i++){printfC%121d%121d*,fl,f2);if(i%2==0)printf("\n"); /・输出两次后换行・/fl=fl+f2; f2=f2+fl;))实验六循环(二)1、main(){floatsum=0,mul=l;inti;for(i=l;i<=10;i++){mul*=i;sum+=mul;printf('\n1!+2!+3!+4!+...+10!=%f\n”,sum);)2、main(){intk,m;for(k=l;kく=9;k++){for(m=l;m<=k;k++)printf("%d*%d=%-2d”,m,k,m*k);printf("\n");} }3^main(){inti,j;for(i=l;i<5;i++){for(j=l;jく=40-i;j++)for(j=l;j<=2*i-l;j++)printf('\n");}for(i=3; i>0;i一){for(j=l;jく=40-i;j++)for(j=l;jく=2*i-];j++)printf('\n");} }4、main()printf(printf('*");printf(/z ");printf("*);{intx,y,z;printf("\n大公鸡 母鸡 雏鸡〃);for(x=0;x<20;x++)for(y=0;y<34;y++){ z=100-x-y;if(z%3!=0)continue;if(5*x+3*y+z/3==100)printf(z，\n%8d%8d%8d”,x,y,z);} }5^main(){longs=0,sn=0;intk,n;printf('\nInput n=")；scanf("%d",&n);for(k=l;kく=n;k++){sn=sn+k;s=s+sn;)printf("\nn=%d;s=%ld\n",n,s);)实验七数组(一)1、用随机函数产生15个!00以内的随机整数存入ー维数组,然后分三行输出,每行3个数。#include<math.h>voidmain(){inta[15],i;for(i=0;i<15;i++){a[i]=rand();/・产生一90〜32767之间的随机整数・/if(a[i]<0)a[i]=-a[i];a[i]=a[i]%101;if(i%5—0)printf("\n");printf(，，%8d",a[i]);})2、求出n个学生一门课程中的最高成绩和最低成绩及高于平均成绩的人数。ttdefineN10voidmain(){floata[N]={78,86,65,55,91,83,78,90,69,81);floatmax=0,min=100,avg=0;inti,num=0;for(i=0;i<N;i++){if(a[i]>max)max=a[i];if(a[i]<min)min=a[i];avg=avg+a[i];avg=avg/N;for(i=0;i<N;i++)if(a[i]>avg)num++;printf('\nmax=%.2f, min=%.2f\n”,max,min);printf('\n >%.2f=%d\n”,avg,num);)3、使用数组,求出下列数列的前20项:1, 1, 2, 4, 7, 13,voidmain(){long a[20]={l,1,2};inti;for(i=3;i<20;i++) a[i]=a[i-l]+a[i-2]+a[i-3];for(i=0;i<20;i++){ if(i%5==0)printf('\n");printf("%91d”,a[i]);})4、将一个ー维数组反序放置如:a={67,89,76,98.66}反序放置后a={66,98,76,8967}#defineN5voidmain(){inta[N]={67,89,76,98,66}, i,k;for(i=0;i<N/2;i++){ k=a[i];a[i]=a[N-i-l];a[N-i-l]=k;printf(z/\na={%d",a[〇]);for(i=l;i<N;i++)printf%d，/,a[i]);printf(つ'n");)5、有!0个学生一门课程成绩,使用选择排序法将成绩由高向低排序.#defineN10voidmain(){inta[N]={67,89,76,98,66,55,77,79,96,89);inti,j,p,k;for(i=0;i<N-l;i++){P=i；for(j=i+l;j<N;j++)if(a[p]<a[j])p=j;if(p!=i){k=a[i]; a[i]=a[p]; a[p]=k;})for(i=0;i<N;i++)printfぐ%4d”,a[i]);)实验七数组(二)1、将一个ー维数组a[9]中各元素值按行的顺序放入二维数组b[3][3]中。voidmain(){inta[9]={l,2,3,4,5,6,7,8,9},b[3][3],i,j,k=0;for(i=0;iく3;i++){for(j=0；j<3;j++){b[i][j]=a[k++];printfb[i][j]);)printf('\n");})2、有一mXn矩阵,各元素由随机数产生,将矩阵增加一列,求矩阵每一行的元素值之和,并将它放入增加列.ttinclude<math.h>#definem 3#define n4voidmain(){longa?[n+l];inti,j;for(i=0;iくm;i++){a[i][n]=0;for(j=0;j<n;j++) {a[i][j]=rand();a[i][n]=a[i][n]+a[i][j]; printf("烬Id",a[i][j]);}printfC%81d\n",a[i][n]);})3、有一mXn矩阵,找出最大元素值及其所在的行、列位置。#include<math.h>#definem3#definen4main(){longa?[n];inti,j,row=0,co1=0;for(i=0;iくm;i++){for(j=0;j<n;j++){a[i][j]=rand();printf("%81d”,a[i][j]);if(a[row][col]<a[i][j]){row=i;col=j;})printf('\n");)printfC?\nmax=%ldrow=%dcol=%d\n,a[row][col],row+1,col+1);4、有n个考生,每个考生有考号和总分成绩,如果录取m人,确定录取分数线并输出被录取考生的考号和成绩。voidmain(){floata[100][2],temp,tempi;inti,j,p,n;printf('\ninputnumberofstudentn=");scanf&n);for(i=0;iくn;i++){printf(z，\ninputnum,scoreof%dthstudent:,i+1);scanf("%f,%f”,&templ,&temp);a[i][0]=templ;a[i][l]=temp;)for(i=0;i<n-l;i++){P=i；for(j=i+l;j<n;j++)if(a[p][l]<a[j][1]) p=j;if(p!=i){temp=a[p][1];a[p][l]=a[i][1];a[i][l]=temp;temp=a[p][0];a[p][0]=a[i][0];a[i][0]=temp; })printf("\ninputadmittablenumber:");scanf("%d",&p);printf("\noutputnamelist:\n");for(i=0;i<p;i++)printf("%10.Of%10.lf\n",a[i][0],a[i][l]);5、将矩阵m(n,n)对角线上的元素置为1,他置〇.#definen10voidmain(){inta[n][n]={〇},i,j;for(i=0;i<n;i++){ a[i][i]=l;a[i][n-l-i]=l;for(j=0;jくn;j++) printfぐ'％4d”,a[i][j]);printf("\n");})实验十四文件1、 打开“开始—程序 附件 记事本”输入:1001zhangsan7890891002lisi9988771003wangwu8976551004zhaoliu535544存在e盘根目录下,文件名为chengji2^ttinclude<stdio.h>#include<stdlib.h>main()(FILE*fp;intnum,scl,sc2,sc3,score,i;charname[10];回复if((fp=fopen("e:\\chengji.txt","r"))==NULL){printf("Error");exit(0);)for(i=l;i<=N;i++){fscanf(fp,"%d%s%d%d%d\n",&num,name,&scl,&sc2,&sc3);score=scl+sc2+sc3;printf("%6d%10s%6d%6d%6d%6d\n",num,name,scl,sc2,sc3,score/3);)fclose(fp);}3、ttinclude<stdio.h>ttinclude<stdlib.h>ttdefineN5structstudentintnum;charname[10];intscore;chardianhua[10];}；main()(FILE*fp;inti;structstudentstu[N];clrscr();if((fp=fopen("e:\\xuesheng.txt","w"))==NULL){printf("Error");exit(0);)for(i=0;iくN;i++){scanf("%d%s%d%s",&stu[i].num,stu[i].name,&stu[i].score,stu[i].dianhua);fprintf(fp,"%6d%10s%6d%10s\n",stu[i].num,stu[i].name,stu[i].score,stu[i].dianhua);)fclose(fp);}ftinclude<stdio.h>#include<stdlib.h>#defineN5structstudent(intnum;charname[10];intscore;chardianhua[10];)；main()(FILE*fp;inti,xuehao;structstudentstu[N];clrscr();if((fp=fopen("e:\\xuesheng.txt","r"))==NULL){printf("Error");exit(0);)scanf("%d",&xuehao);for(i=0;iくN;i++){fscanf(fp,"%d%s%d%s\n",&stu[i].num,stu[i].name,&stu[i].score,stu[i].dianhua);if(stu[i].num-xuehao)printf(//%6d%10s%6d%10s\n//,stuEi].num,stu[i].name,stu[i].score,stu[i].dianhua);}fclose(fp);)^include<stdio.h>ttinclude<stdlib.h>voidmain()(FILE*fpl,*fp2;charch;if((fpl=fopen(*c:\\tc\\file4.c，f,"r"))==NULL)〃以读文本文件方式打开原有文件{printf("Error");exit(0);)if((fp2=fopen("c:\\tc\\file5.c","w"))=NULL)〃以写文本文件方式打开目标文件{printf("Error");exit(0);)ch=fgetc(fpl);while(ch!=E0F)(fputc(ch,fp2)J 〃把该字符写入目标磁盘文件ch=fgetc(fpl)J 〃从原有磁盘文件中读ー个字符}fclose(fpl);fclose(fp2);)#include<stdio.h>ttinclude<stdlib.h>^include<math.h>#defineN5voidmain()(FILE*fp;intnum,jdl,jd2,jd3,jd4,jidu,i;实验ーttinclude<stdio.h>voidmain()(inta,b,c;scanf("%d,%d,%d",&a,&b,&c);printf("sum=%d\n”,a+b+c);}2、#include<stdio.h>voidmain()(inta,b,he,cha,ji,shang;scanf("%d,%d”,&a,&b);he=a+b;cha=a-b;ji=a*b;shang=a/b;printf("he=%d\n”,he);printf("cha=%d\n”,cha);printf("ji=%d\n”,ji);printf("shang=%d\n”,shang);#include<stdio.h>voidmain()(inta,b,c,d,e,sum;scanf("%d,%d,%d,%d,%d",&a,&b,&c,&d,&e);sum=a*a+b*b+c*c+d*d+e*e;printf("sum二%d\n”,sum);}4#include<stdio.h>include<math.h>voidmain()(doublea,b,c,sum;scanfC%lf,%lf,%lf*,&a,&b,&c);sum=sqrt(a)+sqrt(b)+sqrt(c);printf("sum=%f\n",sum);)#include<stdio.h>ttdefinePI3.14159floatr,1,s;printf("请输入圆半径(r):;scanf〃,&r);l=2*PI*r;s=r*r*PI;printf("\n圆周长 1=%6.2f\n",1);printf("圆面积 s=%6.2f\n",s);)ttinclude<stdio.h>voidmain()(printf("ヽ"whatabeautifulcampus!\"\n");printf("\"Iwishyoueverysuccess!\"\n");)实验ニttinclude<stdio.h>voidmain()(inta,b,c;floatx;scanf("a=%d,b=%d,c=%d,x=%f",&a,&b,&c,&x);printf(/f”,a*x*x*x+b*x*x+c);}ttinclude<stdio.h>voidmain()(inta,b;scanf("a=%d,b=%d",&a,&b);printfIji=%d,shang=%d,yushu=%d”,a*b,a/b,a%b);}3、ttinclude<stdio.h>voidmain()(floatc,f;printf("请输入一个华氏温度f:;scanf("%f",&f);c=5.0/9.0*(f-32);printf("\n摄氏温度为:%5.2f\n",c);)ttinclude<stdio.h>#definePI3.14159floatr,1,s;printf("请输入圆半径(r):");scanf("犯",&r);l=2*PI*r;s=r*r*PI;printf("\n圆周长 1=%6.2f\n",1);printf("圆面积 s=%6.2f\n",s);)#include<stdio.h>voidmain()(floatc=3.123456789;printf("%f",c);ttinclude<stdio.h>voidmain()(inta=2;a+=a;printf("%d\n",a);a-=2;printf("%d\n",a);a*=2+3;printf("%d\n,a);a/=a+a;printf("%d\n",a);实验三1、ftinclude<stdio.h>voidmain()(inta=3,b=4,c=5;floatx=l.414,y=l.732,z=2.712;printf("a=%-7db=%-7dc=%-7d\nx=%-7.3fy=%-7.3fz=%-7.3f”,a,b,c,x,y,z);)2、#include<stdio.h>voidmain()(inta,b,c;floatx,y,z;scanf("%d",&a);scanf&b);scanf("%d",&c);scanf("%f",&x);scanf("%f",&y);scanf("%f",&z);printf("a=%d,b=%d,c=%d\nx=%.3f,y=%.3f,z-%.3f,\n",a,b,c,x,y,z);3、ttinclude<stdio.h>voidmain()(inta,b,c,xl,x2;scanf("%d,%d,%d",&a,&b,&c);xl=a+b+c;x2=a-b-c;printf("x1=a+b+c=%d+%d+%d=%d\n",a,b,c,xl);printf("x2=a-b-c=%d-%d-%d=%d\n",a,b,c,x2);)4^ttinclude<stdio.h>charcl,c2,c3,c4;scanf(，/%c%c%c%c，/,&cl,&c2,&c3,&c4);printf(*%d,%d,%d,%d”,cl,c2,c3,c4);}5、ttinclude<stdio.h>voidmain()(intdl=60,d2=61,d3=62,d4=63;printf(〃祝，%c,%c,%c”,dl+5,d2+5,d3+5,d4+5);)6、ttinclude<stdio.h>voidmain(){intm=12345678,n=3456789;printf("m=%dn=%d”,m,n);)7^ttinclude<stdio.h>voidmain()(inta=20,b=64,c=127;printf("a=%d,%o,%x\n”,a,a,a);printf("c=%d,%o,%x\n”,c,c,c);)#include<stdio.h>voidmain(){floatx,y,z;x-1.414;y=1.732;z=2.712;printf("加.2f,%6.2f,%6.2f",x,y,z);)9^ttinclude<stdio.h>voidmain()(printf("%.6f%%",1.0/3);}10>^include<stdio.h>voidmain()(inta,b,a=getchar(b=getchar()c=getchar();a=a+32;b=b+32;c=c+32;putchar(a);putchar(b);putchar(c);)实验四选择结构程序设计.有三个整数a,b,c, 由键盘输入,输出其中最大的数。参考程序main(){inta,b,c,max;printf("请输入a,b,c=");scanf("%d,%d,%d",&a,&b,&c);max=a;if(max<b)max=b;if(max<c)max=c;printf("\n最大数max=%d\n”,max);).参看《C程序设计》第三版谭浩强第108页的例5.6..有一函数:写ー程序,输入x,输出y〇main(){floatx,y;printf("请输入x=");scanf&x);if(x<l)y-x;elseif(x<10)y=2*xT;elsey=3*xTl;printf(/z\nx=%fy=%f\n,x,y);}.给出ー百分制成绩,要求输出成绩等级:90分以上为‘A';80〜89分为，B，;7〇〜79分为/L;6〇〜69分以上为，D';60分以下为，E参考程序1main(){ints;charr;printf("请输入score=")；scanf("%d",&s);if(s〉=90) r='A';elseif(s>=80) r='B';elseif(s>=70)r='C ;elseif(s>=60)r='D';elser='E';printf(z/\nscore二%d result=%c\n”,s,r);参考程序2main(){ints,i;charr;printf("请输入score=")；scanf("%d",&s);i=(s-s%10)/10;switch(i){case10:case9: 『'A' ; break;case8; r二'B' ; break;case7: r二'C' ; break;case6: r二'D' ; break;default;r二'E';printf("\nscore二%d result二枇\n",s,r);5.企业发放奖金1根据利润提成,以下是提成办法:Iく=10万部分10%10くIく=20万部分7.5%20くIく=40万部分5%40くIく=60万部分3%60くIく=100万部分1.5%I>100万部分1%从键盘输入当月利润I,求应发奖金总数。要求:①用if语句编程序;②用switch语句编程序。参考程序1main()floatbl,b2,b3,b4,b5,b6,I;printf(〃请输入本月利润:〃)；scanf&I);b1=b2=b3=b4=b5=b6=0;if(I>100){b6=(1-100)*0.01;b5=40*0.015;b4=2〇・〇.03;b3=2〇・〇.05;b2=l〇・〇.075;bl=10*0.1;elseif(I>60){b5=(b60)*0.015;b4=20*0.03;b3=20*0.05;b2=l〇・〇.075;bl=10*0.1;)elseif(I>40){b4=(1-40)*0.03;b3=20*0.05;b2=10*0.075;bl=10*0.1;)elseif(I>20){b3=(l-20)*0.05;b2=l〇・〇.075;bl=10*0.1;)elseif(I>10){b2=(l-10)*0.075;bl=10*0.1;)elsebl=l*O.1;printf("\n本月利润!-%f万元;奖金b=%f万元、n”,1,bl+b2+b3+b4+b5+b6);参考程序2main()floatbl,b2,b3,b4,b5,b6,I,B;printf(〃请输入本月利润:〃)；scanf&1);B=0;b6=(1-100)*0.01;b5=4〇・〇.015;b4=2〇・〇.03;b3=2〇・〇.05;b2=l〇・〇.075;bl=10*0.1;if(I>100) B+=bl+b2+b3+b4+b5+b6;elseif(I>60) B+=(I-60)*0.015+b4+b3+b2+bl;elseif(I>40) B+=(I-40)*0.03+b3+b2+bl;elseif(I>20) B+=(120)*0.05+b2+blelseif(I>10) B+=(l-10)*0.075+bl;elseB-I*O.1;printf("\n本月利润I=%f万元;奖金B=%f万元、n”,LB);参考程序3main()floatbl,b2,b3,b4,b5,b6,1,B;intn;printf(〃请输入本月利润:“)；scanf&I);B=0;b6=(1-100)*0.01;b5=40*0.015;b4=2〇・〇.03;b3=2〇・〇.05;b2=l〇・〇.075;bl=10*0.1;n=i/10;switch(n){case0:B=I+O.1;break;B+=(1-10)*0.075+bl;break;B+=(I-20)*0.05+b2+bl;break;B+=(I-40)*0.03+b3+b2+bl;break;B+=(I-60)*0.015+b4+b3+b2+bl;break;default:B+=bl+b2+b3+b4+b5+b6;}printf("\n本月利润I=%f万元;奖金B=%f万元、n”,I,B);6.给ー个不多于5位的正整数,要求:①求出它是几位数;②分别打印出每一位数字:③按逆序打main。(intnl,n2,n3,n4,n5,n;longnum;printf("请输入0--99999之间的ー个数:")；scanf("%ld",&num);if(num>9999)n=5;elseif(num>999)n=4;elseif(num>99)n=3;elseif(num>9)n=2;elsen=l;n3=num/100%10; /・取百位・/n4=num/10%10; /・取十位・/n5=num%10; /・取个位・/printf(/z\n原数据num=%ld\n，，,num);printfC反序数为:〃)；switch(n){case1:printf("%d\n",n5);break;printf("%d%d\n”,n5,n4);break;case3;printf("%d%d%d\n”,n5,n4,n3);break;printf("%d%d%d%d\n”,n5,n4,n3,n2);break;printf(，/%d%d%d%d%d\n/，,n5,n4,n3,n2,nl);break;回复21楼2012-03-2912:42举报*• 郑大男人nl=num/10000; /・取万位・/n2=num/1000%10; /・取千位・/［转］郑州大学09级C语言实验报告答案(实验5——实验14)转载自真诚★相约转载于2010年05月05日17:16阅读(3)评论(0)分类:大学生活举报实验五循环(一)1、参看谭浩强(第三版)P114-1152^main(){inti,j;for(i=l;i<l1;i++){for(j=l;j<=40-i;j++)printf("、、for(j=l;jく=2*iT;j++) printf("%d”,iT)；printf("\n");}3、main(){intp=l; /・说明符号位・/longn;floatt=l.0/3.0,sum=lT.0/3.0;for(n=3; t>=l.0e-5; n++){t=l.0/(n*n+l);sum=sum+p*t; p=-p；}printf(，z\nsum=%f\n,sum);})4、main(){charc;intk;intnl=O,al=O,ul=O; /・分别存放数字、字母及其它字符个数・/printf('\nInput30 chars:z/);for(k=l;kく=30;k++){scanf("%c",&c);if(c>='A'&&cく='Z'IIc>='a'&&cく='z') al++;elseif(c>=’〇'&&c<='9') nl++;elseul++;)printf(z/\n〇〜9=%d;A〜Za〜z=%d;otherwise=%d\n”,nl,al,u1)；)5、main(){inti;longintfl,f2;fl=0;f2=l;for(i=l;iく=10;i++){printf(*%121d fl,f2);if(i%2==0)printf("\n"); /・输出两次后换行・/fl=fl+f2; f2=f2+fl;))实验六循环(二)1、main(){floatsum=0,mul=l;inti;for(i=l;iく=10;i++){mul*=i;sum+=mul;)printf('\n1!+2!+3!+4!+...+10!=%f\n”,sum);)2、main(){intk,m;回复22楼for(k=l; kく=9;k++){for(m=l;m〈=k;k++)printf("%d*%d=%-2d”,m,k,m*k);printf('\n");} }3、main(){inti,j;for(i=l;i<5;i++){for(j=l;jく=40-i;j++)for(j=l;j<=2*i-l;j++)printf('\n");}for(i=3; i>0;i—){for(j=l;j<=40-i;j++)for(j=l;jく=2*iT;j++)

printf("\n");} }4、main(){intx,y,z;printf(z/\n大公鸡母鸡for(x=0;x<20;x++)for(y-0;y<34;y++){ z=100-x-y;if(z%3!=0)continue;if(5*x+3*y+z/3==100)printf(〃'n%8d%8d%8d”,5^main()printf(printf('*");雏鸡〃）；,y,z)；}{longs=0,sn=0;intk,n;printf(/z\nInputn=つ;scanf("%d",&n);for(k=l;kく=n;k++){sn=sn+k;s=s+sn;)printf('\nn=%d;s=%ld\n”,n,s);)实验七数组(一)1、用随机函数产生15个!00以内的随机整数存入ー维数组,然后分三行输出,每行3个数。^include<math.h>voidmain(){inta[15],i;for(i=0;i<15;i++){a[i]=rand();/・产生一9〇〜32767之间的随机整数・/if(a[i]<0)a[i]=-a[i];a[i]=a[i]%101;if(i%5==0)printf("\n");printf("%8d",a[i]);})2、求出n个学生一门课程中的最高成绩和最低成绩及高于平均成绩的人数。^defineN10voidmain(){floata[N]={78,86,65,55,91,83,78,90,69,81);floatmax=0,min=100,avg=0;inti,num=0;for(i=0;i<N;i++){if(a[i]>max)max=a[i];if(a[i]<min)min=a[i];avg=avg+a[i];avg二avg/N;for(i=0;i<N;i++)if(a[i]>avg) num++;printf("\nmax=%.2f,min=%.2f\n,max,min);printf("\n >%.2f=%d\n”,avg,num);)3、使用数组,求出下列数列的前20项:1, 1, 2, 4, 7, 13,voidmain(){long a[20]={l,1,2};inti;for(i=3;iく20;i++) a[i]=a[iT]+a[i-2]+a[i-3];for(i=0;i<20;i++){ if(i%5==0)printf("\n");printf(*%91dn,a[i]);})4、将一个一维数组反序放置如:a={67,89,76,98.66}反序放置后a={66,98,76,8967}^defineN5voidmain(){inta[N]={67,89,76,98,66},i,k;for(i=0;i<N/2;i++){ k=a[i];a[i]=a[N-i-l];a[N-i-l]=k;}printf(*\na={%d",a[〇]);for(i=l;iくN;i++)printf(",观"，a[i]);printf("}\n");}5、有!0个学生一门课程成绩,使用选择排序法将成绩由高向低排序.ftdefineN10voidmain(){inta[N]={67,89,76,98,66,55,77,79,96,89);inti,j,p,k;for(i=0;i<N-l;i++){p=i；for(j=i+l；jくN;j++)if(a[p]<a[j])p=j;if(p!=i){k=a[i]; a[i]=a[p]; a[p]=k;})for(i=0;i<N;i++)printfぐ%4d”,a[i]);)实验七数组(二)1、将一个ー维数组a[9]中各元素值按行的顺序放入二维数组b[3][3]中。voidmain(){inta[9]={l,2,3,4,5,6,7,8,9},b[3][3],i,j,k=0;for(i=0;iく3;i++){for(j=0;j<3;j++){b[i][j]=a[k++];printf("%8d",b[i][j]);printf('\n");})2、有一mXn矩阵,各元素由随机数产生,将矩阵增加一列,求矩阵每一行的元素值之和,并将它放入增加列.ttinclude<math.h>#definem3#define n4voidmain(){longa?En+l];inti,j;for(i=0;iくm;i++){a[i][n]=0;for(j=0;j<n;j++) {a[i][j]=rand();a[i][n]=a[i][n]+a[i][j]； printf(为81d”,a[i][j])；}printfC%81d\n",a[i][n]);})3、有一mXn矩阵，找出最大元素值及其所在的行、列位置。ftdefinem3#definen4main(){longa?En];inti,j,row=0,col=0;for(i=0;iくm;i++){for(j=0;j<n;j++){a[i][j]=rand();printf(*%81d*,a[i][j]);if(a[row][col]<a[i][j]){row=i;col=j;})printf('\n");)printf(z，\nmax=%ldrow=%dcol=%d\n,a[row][col],row+1,col+1);)4、有n个考生,每个考生有考号和总分成绩,如果录取m人,确定录取分数线并输出被录取考生的考号和成绩。voidmain(){floata[100][2],temp,tempi;inti,j,p,n;printf("\ninputnumberofstudentn=");scanf("%d",&n);for(i=0;i<n;i++){printf(/z\ninputnum,scoreof%dthstudent:,i+1);scanf(/z%f,%f”,&templ,&temp);a[i][0]=templ;a[i][l]-temp;)for(i=0;i<n-l;i++){P=i；for(j=i+l;j<n;j++)if(a[p][l]<a[j][1]) p=j;if(p!=i){temp=a[p][1];a[p][l]=a[i][1];a[i][l]=temp;temp=a[p][0];a[p][0]=a[i][0];a[i][0]=temp; }}printf('\ninputadmittablenumberscanf&p);printf('\noutputnamelist:\n");for(i=0;i<p;i++)printf("机。.Of%10.lf\n",a[i][0],a[i][1]);)5、将矩阵m(n,n)对角线上的元素置为1,他置〇.#definen10voidmain(){inta[n][n]={〇},i,j;for(i=0;i<n;i++){a[i][i]=l;a[i] ;for(j=0;j<n;j++)printf("%4d",a[i][j]);printf('\n");}}实验十四文件1、 打开”开始—程序 附件 记事本”输入:1001zhangsan7890891002lisi9988771003wangwu8976551004zhaoliu535544存在e盘根目录下,文件名为chengji2、ttinclude<stdio.h>ttinclude<stdlib.h>#defineN5main()(FILE*fp;intnum,scl,sc2,sc3,score,i;charname[10];if((fp=fopen("e:\\chengji.txt","r"))==NULL){printf("Error");exit(0);)for(i=l;i〈=N;i++){fscanf(fp,"%d%s%d%d%d\n”,&num,name,&scl,&sc2,&sc3);score=scl+sc2+sc3;printf(/，%6d%10s%6d%6d%6d%6d\n//,num,name,scl,sc2,sc3,score/3);}fclose(fp);}3^ttinclude<stdio.h>ttinclude<stdlib.h>#defineN5structstudent{intnum;charname[10];intscore;chardianhua[10];)；main()FILE*fp;inti;structstudentstu[N];clrscr();if((fp=fopen("e:\\xuesheng.txt","w"))==NULL){printf("Error");exit(0);)for(i=0;iくN;i++){scanf("%d%s%d%s",&stu[i].num,stu[i].name,&stu[i].score,stu[i].dianhua);fprintf(fp,"%6d%10s%6d%10s\n",stu[i].num,stu[i].name,stu[i].score,stu[i].dianhua);)fclose(fp);}4、ftinclude<stdio.h>#include<stdlib.h>#defineN5structstudent(intnum;charname[10];intscore;chardianhua[10];);main()(FILE*fp;inti,xuehao;structstudentstu[N];clrscr();if((fp=fopen("e:\\xuesheng.txt","r"))==NULL){printf("Error");exit(0);}scanf("%d",&xuehao);for(i=0;iくN;i++){fscanf(fp,"%d%s%d%s\n",&stu[i].num,stuLi].name,&stu[i].score,stu[i].dianhua);if(stu[i].num==xuehao)printf("%6d%10s%6d%10s\n",stuLi].num,stu[i].name,stu[i].score,stu[i].dianhua);)fclose(fp);)#include<stdio.h>ftinclude<stdlib.h>voidmain()(FILE*fpl,*fp2;charch;if((fpl=fopen('c:\\tc\\file4.c","r"))==NULL)//以读文本文件方式打开原有文件{printf("Error");exit¢0);}if((fp2=fopen("c:\\tc\\file5.c","w"))"NULL)〃以写文本文件方式打开目标文件{printf("Error");exit(0);}ch=fgetc(fpl);while(ch!=EOF){fputc(ch,fp2)J〃把该字符写入目标磁盘文件ch=fgetc(fpl)1 〃从原有磁盘文件中读ー个字符fclose(fpl);fclose(fp2);)#include<stdio.h>ttinclude<stdlib.h>#include<math.h>#defineN5voidmain()(FILE*fp;intnum,jdl,jd2,jd3,jd4,jidu,i;1、#include<stdio.h>voidmain()(inta,b,c;scanf("%d,%d,%d",&a,&b,&c);printf("sum=%d\n”,a+b+c);}2、voidmain()(inta,b,he,cha,ji,shang;scanf("%d,%d",&a,&b);he=a+b;cha=a-b;ji=a*b;shang=a/b;printf("he=%d\n”,he);printf("cha=%d\n”,cha);printf("ji二%d\n”,ji);printf("shang=%d\n”,shang);}3、^include<stdio.h>voidmain()(inta,b,c,d,e,sum;scanf("%d,%d,%d,%d,%d",&a,&b,&c,&d,&e);sum=a*a+b*b+c*c+d*d+e*e;printf〈sum=%d\n”,sum);4#include<stdio.h>include<math.h>voidmain()(doublea,b,c,sum;scanfC%lf,%lf,%lf”,&a,&b,&c);sum二sqrt(a)+sqrt(b)+sqrt(c);printf("sum=%f\n,sum);)#include<stdio.h>ttdefinePI3.14159voidmain(){floatr,1,s;printf("请输入圆半径(r);scanf("%f",&r);l=2*PI*r;s=r*r*Pl;printf("\n圆周长 1=%6.2f\n",1);printf("圆面积 s=%6.2f\n",s);#include<stdio.h>voidmain()(printf("ヽ"whatabeautifulcampus!\"\n");printf("\"Iwishyoueverysuccess!\"\n");)实验ニ1、ttinclude<stdio.h>voidmain()(inta,b,c;floatx;scanf("a=%d,b=%d,c=%d,x=%f",&a,&b,&c,&x);printf("%f",a*x*x*x+b*x*x+c);)2、ttinclude<stdio.h>voidmain()(inta,b;scanf("a=%d,b=%d",&a,&b);printf("ji=%d,shang=%d,yushu=%d”,a*b,a/b,a%b);}3、#include<stdio.h>voidmain()(floatc,f;printf("请输入一个华氏温度f:;scanf&f);c=5.0/9.0*(f-32);printf("\n摄氏温度为:%5.2f\n",c);)ttinclude<stdio.h>#definePI3.14159voidmain()(floatr,1,s;printf("请输入圆半径(r);scanf("%f〃,&r);l=2*PI*r;s=r*r*PI;printf("\n圆周长 1=%6.2f\n",1);printf("圆面积 s=%6.2f\n",s);)ttinclude<stdio.h>voidmain()(floatc-3.123456789;printfc);6、ttinclude<stdio.h>voidmain()(inta=2;a+=a;printf("%d\n",a);a--2;printf("%d'n",a);a*=2+3;printf("%d\n〃,a);a/=a+a;printf("%d'n",a);实验三voidmain()(inta=3,b=4,c=5;floatx=1.414,y=1.732,z=2.712;printf(/za