C语言程序的设计实验-答案

PAGE..-前言-/*非常感谢度娘以及各位网上C语言高手的支持,才能让敝人完成此文档的整理。本文档集合了本人、度娘、众网友的力量,其中代码的正确率约为90%〔不正确的有标注。为回报度娘及众网友的帮助,本文档免费下载。*//*配"电子科技大学出版社〔周信东主编"的C语言程序设计实验*//*努力吧,骚年以及学妹们！*//*整理edby口玉刀一ofGUET.*/=====================实验一C语言程序初步=====================1.已知a=5,b=4,c=6,求出s并换行#include"stdio.h"main<>{inta,b,c,s; a=5;b=4;c=6; s=<a+b+c>/3; printf<"a=%d,b=%d,c=%d\n,s=%d",a,b,c,s>;}2.输入一个数字求他的平方#include<stdio.h>main<>{ intr,s; scanf<"%d",&r>; s=r*r; printf<"s=%d\n",s>;}3.〔1#include<stdio.h>main<>{ printf<"*\n">; printf<"***\n">; printf<"*\n">;}〔2#include<stdio.h>main<>{ intv; inta,b,c;//a,b,caersides,visvolumeofcube a=3;b=3;c=5; v=a*b*c; printf<"v=%d\n",v>;}=================================实验二数据类型、运算符和表达式=================================〔1//总觉得打印结果怪怪的,DOYOUTHINKSO?main<>{ chars1='3',s2='4',s3='5'; intc1=101,c2=102; printf<"3%c\t4%c\t5%c\n",s1,s2,s3>;//3%c为输出3和%c printf<"s1=%d\ts2=%d\ts3=%d\n",s1,s2,s3>;//注意哦,s1,s2,s3是char!而%d：输入输出为整形%ld长整型%hd短整型%hu无符号整形%u%lu%s:输入输出为字符串%c字符%f：输入输出为浮点型%lf双精度浮点型printf<"c1=%d\t~%c\n",c1,c1>;//换码符'\t',表示水平制表位〔horizeontaltab,它的作用是将光标移到最接近8的倍数的位置 printf<"c2=%d\t~%c\n",c2,c2>;//注意c1,c2的类型}〔2//运行结果为8.300000%是求余数先运算x-y,把结果转换为int型的有利于四则运算main<>{ floatx=8.3,y=4.2,s; inta=7; s=x+a%5*<int><x-y>%2/3; printf<"s=%f",s>;}〔3main<>{ inti,j,p,q; i=3;j=6; p=i++; q=--j; printf<"%d,%d,%d,%d\n",i,j,p,q>; p=i--+3; q=++j-4; printf<"%d,%d,%d,%d",i,j,p,q>;}〔4main<>{ intm=15,n=9,s; m*=3+2; printf<"%d",m>; n+=n-=n*=n;printf<"%d",n>; printf<"%d\n",<s=6*5,m+n+s>>; printf<"%d\n",s>;}2.〔1#include<stdio.h>#defineMM40main<>{ inta=3,b=6,t; t=MM/<3+6>; printf<"%d%d",t,MM>;}//原来printf语句打成了print,printf语句中少了一个%d.〔2#include<stdio.h>main<>{ intm; doublex; scanf<"%d",&m>; x=3.14*m*m; printf<"%f",x>;}//注意分号,%f转义〔3main<>{ intm=8,n=5; printf<"%d",m*=m-n>; printf<"%d,%d,%d",m=m+1,n-1,m+n>;}main<>{ inta=9,b=5; a+=b; b=a-b; a-=b; printf<"%d%d",a,b>;}//4.输入a,b,c三个变量,计算数学公式<a*b>/cmain<>{ inta,b,d; floats,c; scanf<"%d%d%f",&a,&b,&c>; d=a*b; s=d/c; printf<"%f",s>;}=================================实验三顺序结构和输入输出方法=================================1.〔1main<>{ intm=345,t; floatn=2.56; t=2.56*100; printf<"m=%d,n*100=%d\n",m,t>;}〔2main<>{ inta,b,c,s,v; scanf<"%d%d%d",&a,&b,&c>; s=a*b; v=a*b*c; printf<"%d,%d,%d\n",a,b,c>; printf<"s=%d,v=%d\n",s,v>;}2.〔1main<>{ intm,n; floatx=3.5,y=6.2; scanf<"%d,%d",&m,&n>; printf<"%6d,%6d",m,n>;/*每个数的输出宽度为6,两个数之间逗号建个。*/ printf<"x=%7.2f,y=%7.2f",x,y>;/*个数的输出宽度7,小数位2*/}〔2main<>{ inta,b; longm,n; floatp,q; scanf<"a=%d,b=%d\n%f,%f",&a,&b,&p,&q>; scanf<"%ld",&m>; scanf<"%ld",&n>; printf<"a=%d,b=%d\nm=%ld,n=%ld\n",a,b,m,n>; printf<"p=%f,q=%f\n",p,q>;}//打印结果有误！！3.main<>{inti,j,k,ss,m=1,n=1;scanf<"%d%d",&i,&j>;m+=i++; n*=--j; ss=<k=m+2,n-5,k+n>; printf<"%d",ss>;}4.#include<stdio.h>main<>{ charc1,c2; c1=getchar<>; c2=getchar<>; putchar<c1>; putchar<c2>; printf<"c1=%c,c2=%c",c1,c2>; printf<"%d.%d\n",c1,c2>;}#include<stdio.h>main<>{ inta=790,b,c; b=790/60; c=790%60; printf<"%d小时%d分钟",b,c>;}#include<stdio.h>main<>{ inta,b,c,d; scanf<"%d%d%d",&a,&b,&c>; d=a; a=c; c=b; b=d; printf<"%d,%d,%d\n",a,b,c>;}#include<stdio.h>main<>{ doublea; scanf<"%lf",&a>; printf<"%.2f\n",a>;}=================================实验四逻辑运算判断选取控制=================================1.1.a.错误原因分析：Switch分号错误switch<a*a+b*b>{case3:case1:y=a+b;break;case0:y=b-a;break;}b.错误原因分析：switch语句使用错误,后跟括号。Default放在后边。switch<a>{case10:y=a-b;break;case11:x=a*b;break;default:x=a+b;}c.错误原因分析：没有输出语句。switch<a+b>{case10:x=a+b;break;case11:y=a-b;break;}2.〔1main<>{intx,y;scanf<"%d",&x>;if<x>-5&&x<0>y=x;if<x==0>y=x-1;if<x>0&&x<10>y=x+1;printf<"%d",y>;}<2>main<>{ intx,y; scanf<"%d",&x>; if<<x>-5>&&<x<0>>y=x; elseif<x==0>y=x-1;elseif<x>0&&x<10>y=x+1;printf<"%d",y>;}3.main<>{inta,M; scanf<"%d",&a>; M=a>0?a:-a; printf<"abs<a>=%d",M>;}4.main<>{ intc,t,m; printf<"inputthenumberofcoatandtrousersyourwantbuy:\n">; scanf<"%d%d",&c,&t>; if<c==t>if<c>=50>m=c*80;elsem=c*90;elseif<c>t> if<t>=50>m=t*80+<c-t>*60;else90*t+<c-t>*60; elseif<c>=50>80*t+<t-c>*45; elsem=c*90+<t-c>*45; printf<"%d",m>;}#include<stdio.h>intmain<void>{ inta,b,c; scanf<"%d%d%d",&a,&b,&c>; if<a+b<=c||a+c<=b||b+c<=a> printf<"不构成三角形\n">; elseif<a==b&&b==c> printf<"等边三角形\n">; elseif<a==b||b==c||a==c> printf<"等腰三角形\n">; else printf<"不等边三角形\n">; return0;}#include"stdio.h"main<>{ longa; scanf<"%ld",&a>; if<a%5==0> if<a%7==0> printf<"yes\n|">; elseprintf<"no\n">;}=================================实验五循环结构=================================#include"stdio.h"main<>{intn;while<1> {printf<"Enteranumber:">; scanf<"%d",&n>; if<n%2==1> {printf<"Isaid">; continue; } break; } printf<"Thanks.Ineededthat!">;}#include<stdio.h>main<>{ intc; while<<c=getchar<>>!='\n'> { if<<c<='X'&&c>='A'||c<='x'&&c>='a'>> c+=2; elseif<c=='y'||c=='Y'||c=='z'||c=='Z'> c=c-24; printf<"%c",c>; } putchar<'\n'>;}#include<stdio.h>intmain<>{ intm,k; for<m=1;m<=4;m++> { if<m==1||m==4> { for<k=1;k<=6;k++> printf<"*">; printf<"\n">;} else printf<"**\n">;} return0;}4.#include<stdio.h>main<>{inta,b,c;printf<"*123456789\n">; printf<"\n">;for<a=1;a<=9;a++> {printf<"%3d",a>; for<b=1;b<=a;b++> {c=a*b; printf<"%3d",c>;} printf<"\n">;}}#include<stdio.h>main<>{ doublee=2,w=0.000001,t; doublen=1,s=1; t=1/w; while<s<t> { s=s*<n+1>; e=e+1/s; n++; } printf<"e=%lf,n=%d\n",e,<int><n-1>>;}#include<stdio.h>voidmain<>{inti,j,k=0,r,s=0,t=1000,a=0;for<i=2;i<=t;i++>{a=0;r=0;{for<j=1;j<i;j++>{k=0;if<i%j==0>{k=j;}r+=k;}if<r==i>a=r;}if<a!=0>{if<a==6>printf<"%d",a>;elseprintf<"+%d",a>;}s+=a;}printf<"=%d\n",s>;}=================================实验六数组=================================1.#include<stdio.h>main<>{ intgrade[6]; inti,mumber; for<i=1;i<=5;++i> grade[i]=0; printf<"enteryournumber\n">; for<i=1;i<=20;++i> { scanf<"%d",&mumber>; if<!mumber>break; ++grade[mumber]; } printf<"\n\nresultofsearch\n">; printf<"\n">; for<i=1;i<=5;++i> printf<"%4d%d\n",i,grade[i]>;}2.#include"stdio.h"main<>{intn,k,xx[20];inti,j,t;printf<"\nPleaseenteranumber">;scanf<"%d",&n>;printf<"\nPleaseenter%dnumbers:",n>;for<i=0;i<n;i++>scanf<"%d",&xx[i]>;printf<"%\nPleaseenteranothernumber:">;scanf<"%d",&k>;for<i=0;i<k;i++>{ t=xx[0]; for<j=1;j<n;j++> xx[j-1]=xx[j]; xx[n-1]=t;}printf<"\nAftermoving:\n">;for<i=0;i<n;i++>printf<"%3d",xx[i]>;printf<"\n">;}3.#include<stdio.h>main<>{ inti,a[100]={90,180,270,380,590,530,140,750,380},b[6];for<i=0;i<6;i++> b[i]=0; for<i=0;i<9;i++> { switch<a[i]/100> { case0:b[0]++;break; case1:b[1]++;break; case2:b[2]++;break; case3:b[3]++;break; case4:b[4]++;break; default:b[5]++;break; } } printf<"Theresultis:">; for<i=0;i<6;i++> printf<"%d",b[i]>; printf<"\n">;}4.#include<stdio.h>main<>{inti,j,t,p,q,s,n,a[11]={6,3,42,23,35,71,98,67,56,38};for<i=0;i<10;i++>{for<j=i+1;j<10;j++>if<a[i]>a[j]> { t=a[i]; a[i]=a[j]; a[j]=t; }printf<"%d",a[i]>;}printf<"\ninputnumber:\n">;scanf<"%d",&n>;for<i=0;i<10;i++>if<n<a[i]>{ for<j=9;j>=i;j-->a[j+1]=a[j];break;}a[i]=n;for<i=0;i<=10;i++>printf<"%d",a[i]>;printf<"\n">;}#include<stdio.h>intmain<>{ chara[100],b[100]; inti=0,j=0,n=0; gets<a>; gets<b>; while<a[j]!=0> { while<<a[j+i]==b[i]>&&b[i]!=0>i++; if<b[i]==0>n++; i=0; j++; } printf<"%d",n>;}=================================实验七字符处理=================================1.该程序的功能是：输入字符串,删除其中的数字,保留剩下的字符。#include<stdio.h>main<>{ chara[40],b[40]; inti,j; printf<"Enterthestring:">; scanf<"%s",a>; i=j=0; while<a[i]!='\0'> { if<!<a[i]>='0'&&a[i]<='9'>> { b[j]=a[i]; j++; } ++i; } b[j]='\0'; printf<"%s",b>;}2.#include"string.h"#include"stdio.h"main<>{ charstr1[50]="everyone!";charstr2[50]="hello";strcpy<str2+strlen<str2>,str1>;printf<"%s",str2>;}//本代码有些奇怪,在有的vc上可以执行,有的却不行。#include"stdio.h"main<>{ inti,pos;charstr[]="Thisisaprogram";for<i=0;str[i]!='\0';i++> { if<str[i]=='a'>{pos=i;break;} }printf<"Thepositionis%d\n",pos>;}4.#include"stdio.h"main<>{ inti,pos;charstr[]="Thisisaprogram";for<i=0;str[i]!='\0';i++> { if<str[i]=='a'>{pos=i;break;} }printf<"Thepositionis%d\n",pos>;}程序运行结果如下图所示：#include"stdio.h"main<>{inti,j,k=0;chars[255];while<<s[k]=getchar<>>!=''>k++;for<j=0;s[j]!='';j++>{ if<s[j]<='Z'&&s[j]>='A'> {s[j]+=32; } if<s[j]<='w'&&s[j]>='a'>s[j]+=3; elseif<s[j]=='x'||s[j]=='y'||s[j]=='z'> s[j]-=23;}printf<"译码后结果:">;for<i=0;s[i]!='';i++>printf<"%c",s[i]>;printf<"\n">;getchar<>;}#include"stdio.h"main<>{inti=0;charstr1[255],str2[255];printf<"\nInputstring1:">;scanf<"%s",str1>;printf<"\nInputstring2:">;scanf<"%s",str2>;while<1>{ if<str1[i]==str2[i]> {i++; continue; } else break;}printf<"\n%d\n",str1[i]-str2[i]>;}=====================实验八函数=====================8.1？？？？？？？？？？？？？？？？？？？未成功inta=3,b=5;max<inta,intb>{ intc; c=a>b?a:b; return<c>;}main<>{ externinta,b; printf<"%d\n",max<a,b>>;}8.2#include<stdio.h>intis_prime<intm>{ inti; if<m==1> return0; for<i=2;i<m;i++> { if<m%i==0> { return0; } } return1;}voidmain<>{ intn,c; scanf<"%d",&n>; c=is_prime<n>; if<c==1> printf<"prime\n">; else printf<"notprime\n">;}8.3#include<stdio.h>intmain<>{intm,n,i,sum=1,t;printf<"请输入m的值：\n">;scanf<"%d",&m>;printf<"请输入n的值:\n">;scanf<"%d",&n>;if<m<n>{t=m;m=n;n=t;}for<i=m;i>=m-n+1;i-->{sum*=i;}for<i=1;i<=n;i++>{sum/=i;}printf<"值为:%d\n",sum>;}=====================实验九指针=====================1.//在每句for<j=0;j<12;j++>前都加上p=a;这句//将if<j%4==0>改为if<<j+1>%4==0>//调试后的程序是:#include<stdio.h>voidmain<>{intj,k,a[12],*p;p=a;for<j=0;j<12;j++>scanf<"%d",p++>;p=a;for<j=0;j<12;j++>{printf<"%d",*p++>;if<<j+1>%4==0>printf<"\n">;}}2.#include<stdio.h>voidmain<>{ voidswap<