C语言课件程序.doc

1:求1100的整数之和。includemain() int i,sum=0; i=1; loop: sum+=i; i+; if(i=100) goto loop; printf(sum=%dn,sum); 2:求1100之间所有奇数之和。includemain() int i,sum=0; for(i=1;i=100;i+=2) sum+=i; printf(sum=%dn,sum);运行输出：sum=25003:求1100之间所有偶数之和。includemain()intsum, i; sum=0;i=2; while(i=100) sum=sum+i; i+=2; printf(sum=%dn,sum); 4:求两个正整数a,b的最大公约数 GCD(Greatest Common Divisor)。 include main() intu,v,t; printf(Input2integers:n); scanf(%d%d,&u,&v); while(v) t=u%v; u=v; v=t; printf(The GCD=%dn,u); 5:输入一个正整数，然后按反向输出。比如输入12345，则输出为54321。includemain() int number,digit; printf(Input an integern); scanf(%d,&number); do digit=number%10; printf(%d,digit); number/=10; while(number); printf(n);6:计算1到5的乘法表。 include main() int i,j; for(i=1;i=5;i+) for(j=1;j=5;j+) printf(%d*%d=%2d,i,j,i*j); printf(n); 7:把输入串中除小写元音字母以外的字符打印出来。includemain() char c; while(c=getchar()!=n) if(c=ac=ec=ic=oc=u) continue; putchar(c); 8:输出100之内3的整倍数。includemain() int i; for(i=1;i=100;i+) if(i%3!=0) continue; printf(%4d,i); 9: 输入三角形的三边，求三角形的面积。include include main() float a,b,c,area,s; printf(Input 3 edges:n); scanf(%f%f%f,&a,&b,&c);if(a+bc&b+ca&a+cb) s = (a+b+c)/2; area = sqrt(s*(s-a)*(s-b)*(s-c); printf(The area=%.2f,area); else printf(Input error!n);10：猜数游戏。程序预置一个常数(称为幻数)，让用户猜，猜对时给出正确信息，否则会给出是大了还是小了的提示。 include main() int magic=618 , guess; printf(Input your guess:n); scanf(%d,&guess); if(guess!=magic) guessmagic ? printf(High):printf(Low); else printf(*Right*n); printf(%d is the magic number.n,magic); 11:用switch语句输出学生的分数等级。设分数大于等于90分者为A等，70分90分为B等(含70)，60分70分为C等(含60)，60分以下为D等，分数为浮点数。includemain() int i; float score; printf(Input a scoren); scanf(%f,&score); i=score/10; switch (i) case 9:; case 10:printf(A);break; case 7:; case 8:printf(B);break; case 6:printf(C);break; default:printf(D); 12:交换两个变量的值。includemain() int a,b,c; a=4,b=8; printf(a=%d,b=%dn,a,b); c=a; a=b; b=c; printf(a=%d,b=%dn,a,b);13:输入一个字符，求其先导字符和后继字符include main() charc,ch,pre,pos; c=getchar();pre=c-1;putchar(pre);putchar(,);putchar(c);putchar(n);scanf(%c,&ch);pos=c+1;printf(%c,%c,c,pos);运行输出：i（键盘上输入两个）h,iii,j14:输入一个球的半径，求其体积；输入一个圆柱体的底面半径和高，求圆柱体的表面积include define PI 3.141593main() float area,volume,rg,rs,h; printf(Input radium of global:n); scanf(%f,&rg); volume = 4*PI*rg*rg*rg/3; printf(Input radium and height of column:n); scanf(%f%f,&rs,&h); area = 2*PI*rs*rs+2*PI*rs*h; printf(The volume=%10.2fn,volume); printf(The area=%-10.2fn,area);运行输出：Input radium of global:3.5Input radium of column：4.2 4.5The volume= 179.59 (右对齐)The area=129.74 (左对齐) 15:将数组倒置define N 10includemain()int i,j,t,aN;for(i=0;i=N-1;i+) scanf(%d,&ai);for(i=0;i=N-1;i+) printf(%3d,ai);printf(n); for(i=0,j=N-1;i=N/2-1;i+,j-) t =ai; ai=aj; aj=t;for(i=0;i=N-1;i+) printf(%3d,ai);16:求某年某月某日是该年的第几天。includemain()int i,leap,y,m,d;int days213=0,31,28,31,30,31,30,31,31,30,31,30,31, 0,31,29,31,30,31,30,31,31,30,31,30,31 ;printf(Input year=? mouth=? day=?n);scanf(%d%d%d,&y,&m,&d); leap = y%4=0&y%100! =0y%400=0; for(i=1;im;i+) d=d+daysleapi;printf(It is %dth day of %d yearn,d,y);运行输出：Input year=? month=? day=?2000 3 11It is 61th day of 2000 year17:将一个二维数组行和列的元素互换，存到另一个二维数组中。例如： 1 2 3 1 4 a= b= 2 5 4 5 6 3 6程序如下：includemain() int a23=1,2,3,4,5,6; int b32,i,j; printf(array a:n); for(i=0;i=1;i+) for(j=0;j=2;j+) printf(%5d,aij); bji= aij; printf(n); printf(array b:n); for(i=0;i=2;i+) for(j=0;j=1;j+) printf(%5d,bij); printf(n); /* end of main */18:有一个3*4的矩阵，编程求出其中最大的元素的值，以及其所在的行号和列号。程序如下：includemain() int i,j,row=0, colum=0,max, a34=1,2,3,4,9,8,7,6,-10,10,-5,2; max=a00; for(i=0;i=2;i+) for(j=0;jmax) max=aij; row=i; colum=j; printf(max=%d,row=%d,colum=%d,max,row,colum);19:从键盘输入一行字符，以换行符结束，分别以正向和反向的次序输出。 include define M 80 main() int i,n;char sM;for(i=0;i=M-1;i+) si=getchar(); if(si=n) break; for(n=0;n=0;n-) putchar(sn); 20:输入一行字符，统计其中以空格分开的单词的个数。includemain()char s80,c;int i,num=0,word=0;gets(s);for(i=0;(c=si)!=0;i+) if(c= ) word=0; else if(word=0) word=1; num+; printf(The number of word=%dn,num);运行输出：I love ChinaThe number of word=321:有三个字符串，要求找出其中最大者。includeincludemain()char string20;char str320;int k;for(k=0;k0) strcpy(string,str0); else strcpy(string,str11); if(strcmp(str2,string)0) strcpy(string,str2); printf(nthe largest string is: n%sn,string);22:函数的返回值int max(float x, float y) if(x=y) return(x); else return(y); void main() float a, b, c; scanf(%f%f, &a, &b); c=max(a, b); printf(max=%5.2fn, c); 运行情况如下： 2.5 5.6max= 5.0023:计算x的n次方，x=2 , -3；（n=1, 2, , 9）。 includedouble power(int x, int n) /* 函数首部 */ int i; /* 说明部分 */ double p; p=1; /* 执行部分 */ for(i=1; i=n; i+) p*=x; return(p); /* 返回p值 */ void main( ) int i; for(i=1; i10; i+) printf(power(2, %d)=%8.4f, power(-3, %d)=%11.4fn, i, power(2, i), i, power(-3, i);24:自定义函数求数的平方。 include long square(long); /* 函数声明 函数原型*/void main() long num, result; printf(Input an integer: ); scanf(%ld, &num); result=square (num); /* 函数调用 */ printf(nThe square number of %ld is %ld, num, result); long square (long x) /* 函数定义 */ long x_square; /* 说明部分 */ x_square=x*x; /* 执行部分 */ return x_square; 运行结果：Input an integer： 100 (输入)The square number of 100 is 10000 (输出)25:输入一个整数，输出其平方与立方。include/* calculate square */ long sq(int i) long a; a=i*i; return a; /* calculate cube */ long cub(int j) long b; b=sq(j)*j; return b; void main() int n; printf(Input n=?n); scanf (%d,&n); printf(Square of%d is %ldn,n,sq(n); printf(Cube of %d is %ldn,n,cub(n);运行输出：Input n=? 3Square of 3 is 9 Cube of 3 is 27 26:求n的阶乘的程序：includelong int fac(int);main()int i;for(i=1;i=10;i+)printf(%2d!=%ldn,i,fac(i); Long int fac(int n)if(n=1)return 1;else return n*fac(n-1); 运行输出： 1!=1 2!=2 3!=6 4!=24 5!=120 6!=720 7!=5040 8!=40320 9!=36288010!=362880027:用选择法对数组排序。includevoid selsort(int,int);void main() int i,j,a10; printf(Input 10 integers:n); for(i=0;i=9;i+); scanf(%d,&ai); selsort(a,10); printf(Sorted array are:n); for(i=0;i=9;i+) printf(%3d,ai);void selsort(int a,int n) int i,j,k,t; for(i=0;in-1;i+); k=i; for(j=i+1;jn;j+) if(ajak) k=j; if(k!=i) t=ak; ak=ai; ai=t; /* end of selsort function */28:二分法查找includedefine M 100int bis(int,int,int,int);void main()int i,k,result,aM;printf(Input %d number in order:n,M);for(i=0;i=M-1;i+) scanf(%d,&ai);printf(Enter a number to find:n);scanf(%d,&k);result=bis(a,k,0,M-1);if(result != -1) printf(%d found in array element %dn,k,result);else printf(%d not found!n,k); int bis(int b,int key,int low,int high)int mid;while(low=high) mid=(low+high)/2; if(key=bmid) return mid; else if(keybmid) high=mid-1; else low=mid+1; return -1;29:输入两个数,求较大者#includeint a=8,b=10;int max(int a,int b) int c; c=ab?a:b; return c;void main() int a=25; printf(a=%d,b=%dn, a,b); printf(max=%dn,max(a,b); 另一题30:运行输出： max=8 min=5在main函数中引用a 与 b时，a与b尚未定义, 因此要做extern说明。includeint max(int x,int y) return xy?x:y;main() extern int a,b; int min(int,int) ; printf(max=%dn,max(a,b); printf(min=%dn,min(a,b); int a=8,b=5; int min(int i,int j) return ij?i:j; 31:通过函数调用，交换两个变量的值。 include void exchange(int p1,int p2); /void exchange(int*,int*) void main() int a=5,b=8; printf(a=%d,b=%dn,a,b); exchange(a,b);/(&a,&b); printf(a=%d,b=%dn,a,b); void exchange(int p1,int p2)/(int *p1,int *p2) int n; n=p1;/n=*p1; p1=p2;/*p1=*p2; p2=n;/*p2=n; 32:定义并输入有10个元素的数组，再以反序输出。includevoid main() int i,*p,a10; p=a; puts(Input 10 integer:n); for(i=0;i=9;i+) scanf(%d,p+); p-; puts(reverse output:); for(i=0,i=9;i+) printf(%d,*p-);33:求两个整数的商。includeint div(int,int);void main() int i=9，j=4,(*p)(int,int),k; p=div; k=(*p)(i,j); printf(i/j=%dn,k); int div(int m, int n) return m/n; 34:设文件test.c内容如下,且编译后test.exe存放在c:下。includevoid main(int argc ,char *argv) int i;for(i=1;i test china tianjin bejing china tianjin beijing 35:编一函数 strsave ，可接收一个字符串，然后动态地开辟一个能放得下这个字符串的内存空间，把接收到的字符串复制到其中，并返回该空间的起始地址。includeincludeincludechar *strsave(char*);void main( ) char *str=China,*cp; cp=strsave(str); printf(str=%s,cp=%sn,str,cp); char *strsave(char *s) char *p; if(p=(char*)calloc(strlen(s)+1,1) != NULL) strcpy(p,s); return p; 36:某单位招聘博士人员，国内博士应注明取得博士学位的年份，国外博士要注明取得博士学位的国家。 include void main() struct doctor char name15; int age; int tag; union int date; char country15; catalogue; person;printf(input name,age,tag:n);scanf(%s%d%d, , &person.age, &person.tag);if(person.tag=1) puts(input date-year:); scanf(%d,&person.catalogue.date); if(person.tag=2) puts(Input country name:n ); scanf(%s,person.catalogue.country); printf(n%s,%5d,,person.age);if(person.tag=1) printf(%10dn,person.catalogue.date);if(person.tag=2) printf(%sn,person.catalogue.country);37:打印12个月份。includeenum months jan=1,feb,mar,apr,may,jun,jul,aug,sep ,oct,nov,dec;main() enum months month; char *mname= ,January,February, March,April,May, June,July,August,September,October, November, December; for(month=jan;month=dec;month+) printf(%-2dt%-12sn,month,mnamemonth);运行输出：1 January2 February3 March4 April5 May6 June 7 July8 August9 September10 October11 November12 December38:取一个整数a从右端开始的47位。#includevoid main() unsigned a,b,c,d; scanf(%o,&a); b=a4; c=(04); d=b&c; printf(%o, %dn%o, %dn,a,a,d,d);39:整数a进行右循环移n位。#includevoid main() unsigned a,b,c; int n; scanf(a=%o, n=%d,&a,&n); b=an; c=c | b; printf(%on%o,a,c);40:从键盘录入n个学生的准考证号、姓名、总分，把这些数据保存到磁盘文件kaosheng.lst中，然后再从磁盘文件中读出并在屏幕上显示出来。#include#define N 500struct student unsigned long no; char name15； float score;studN；typedef struct student STU；void save(void); void load(void);int m=0; void main() int i;printf(Input studentn umbern:1n%dn, N)；scanf(%d,&m)；for(i=0;im;i+) scanf(%lu%s%f,&studi.no,,&studi.score)；save();load(); void save(void) FILE *fp； int i; if(fp=fopen(A:kaosheng.lst, wb)=NULL) printf(Open failn); exit(0); for(i=0;im;i+) if(fwrite(&studi,sizeof(STU),1,fp) != 1) printf(File write error!n); exit(0)； fclose(fp)；void load(void) FILE *fp； i