C语言简单有趣例子总结zwf

1 原字输出#includestdio.hint main() printf( n); printf( n); printf( n);return 0; 2正方形求面积#includestdio.h int main() float a,area; printf(请输入边长a=n); scanf(%f,&a); area=a*a; printf(area=%fn,area);3 三数比较大小并输出大的#includestdio.h int main() int a,b,c,max; printf(请输入三个数字（并用逗号隔开）n); scanf(%d,%d,%d,&a,&b,&c); max=a; if(bmax)max=b; if(cmax)max=c; printf(max=%dn,max); return 0;4 三个数求和#includestdio.h int main() int a,b,c,sum; printf(请输入三个数字（用逗号隔开）n); scanf(%d,%d,%d,&a,&b,&c); sum=a+b+c; printf(sum=%dn,sum); return 0;5 两数字比较大小并输出大的#include int main() int x,t,max; printf(请输入两个数字（用逗号隔开）:nn); scanf(%d,%d,%d,&x,&t,&max); if(xt) max=x; else max=t; printf(max=%dn,max); return 0;6 密码输入及提示#include int main() int number1=1234,name1=678,x,y; printf(请输入用户名:); scanf(%d,&x); printf(请输入密码:); scanf(%d,&y); if (x=name1&y=number1) printf(Welcome!n); else printf(number Wrong!n); return 0; 6(2) #include void main() int m,n,x=123,y=345;printf(请输入用户帐号:);scanf(%d,&m);if(m!=x)printf(用户名错误!n(请重新输入)n);else printf(请输入密码:);scanf(%d,&n);if (n=y)printf(欢迎进入!n); else printf(密码错误!n(请重新输入)n); 7 注意接口 (1)#include main()intnumber1=1234,name1=678,x,y;printf(请输入用户名:);scanf(%d,&x);printf(请输入密码:);scanf(%d,&y);if (x=number1,y=name1) printf(欢迎进入数学运算程序!n); int a,b,c,sum;printf(请输入三个数字（用逗号隔开）n);scanf(%d,%d,%d,&a,&b,&c);sum=a+b+c;printf(sum=%dn,sum); else printf(number Wrong!n);（2）#include main()intnumber1=1234,name1=678,x,y;printf(请输入用户名:);scanf(%d,&x);if(x!=number1)printf(输入错误!n);return 0;printf(请输入密码:);scanf(%d,&y);if(y=name1) printf(欢迎进入数学运算程序!n); int a,b,c,sum;printf(请输入三个数字（用逗号隔开）n);scanf(%d,%d,%d,&a,&b,&c);sum=a+b+c;printf(sum=%dn,sum); else printf(number Wrong!n); 8 小写字母换成大写字母 (1)#include int main()char x,y,z;printf(请输入三个小写字母（用逗号隔开）:);scanf(%c,%c,%c,&x,&y,&z);if(97=x&x=122)x=x-32;printf(%cn,x); else printf(输入错误!n);if(97=y&y=122)y=y-32;printf(%cn,y); else printf(输入错误!n);if(97=z&z=122)z=z-32;printf(%cnn,z);else printf(输入错误!n);return 0;(2)#includeint main()char x,y,z;printf(请输入三个小写字母（用逗号隔开):);scanf(%c,%c,%c,&x,&y,&z);x=x-32,y=y-32,z=z-32;printf(%c,%c,%cnn,x,y,z);return 0;9 大写字母换成小写字母#includeint main()char ch;printf(大写字母转换成小写字母，请输入一个大写字母:n);scanf(%c,&ch);if(ch=A&ch=Z)?(ch+32):ch;printf(%cn,ch);return 0;10 求解方程组#includeint main()int x,y=5;printf(请输入x=);scanf(%d,&x);if(x0)y=x*x-2; printf(y=%dn,y);return 0;待定#include void putnumber()int y,number1=123;printf(请输入密码:);scanf(%d,&y);if (y=number1) printf(Welcome!n);else printf(Input number error!n); int main()char name3,x3;name3=xxx;printf(请输入用户名:);x3=getchar();if (x3=name3)putnumber();else printf(Input name error!n);return 0;11 查码#includevoid main()char c1,c2;c1=0;c2=w;printf(%c,%cn,c1,c2);printf(%d,%dnn,c1,c2);12 从小到大#includeint main()int x,y,z,t;printf(请输入三个数字（用逗号隔开）:);scanf(%d,%d,%d,&x,&y,&z);if (xy)t=x;x=y;y=t; /*交换x,y的值*/ if(xz)t=z;z=x;x=t;/*交换x,z的值*/ if(yz)t=y;y=z;z=t;/*交换z,y的值*/printf(small to big: %d %d %dn,x,y,z);return 0; 二、13 switch分数等级 #includeint main()int score,n;char a;doprintf(请正确输入分数: );scanf(%d,&score);while(score100);n=score/10;switch(n)case 9:case 10: a=A;break;case 8: a=B;break;case 7: a=C;break;case 6: a=D;break;default: a=E;break;printf(分数为%d分n等级为%cn,score,a);return 0; if 等级优化#includeint main()int result;char grade;printf(请输入分数:);scanf(%d,&result); doprintf(输入错误，请重新输入:);scanf(%d,&result); while(result100);if (result=90&result=80&result=70&result=60&result=0&result60)grade=E; printf(Grade=%cnn,grade); return 0; 14 方程解#includeint main()int x,y;printf(请输入x的值为:);scanf(%d,&x);if(x=1&x=10) y=3*x-11;printf(y=%dnn,y);return 0; 15 if分数等级#includeint main() int result;char grade;printf(请输入分数:);scanf(%d,&result);if(result100) printf(input Error!n);return 0;else if(result60) grade=E;else if(result70) grade=D; else if(result80) grade=C;else if(result90) grade=B; else grade=A;printf(Grade=%cnn,grade);return 0;16 字符判断#includeint main()char c1;printf(请输入一个字符:);c1=getchar(); if(c1=a&c1=A&c1=48&c1=57) printf(is a number!n); else printf(is a other!n); return 0;17 输入中文（指针）#includeint main()char str1=呵呵; printf(%snn,str1); return 0;18 棱形*双重循环#includevoid main()int i,j;for(i=1;i=4;i+)for(j=1;j40-i;j+) printf( );for(j=1;j=1;i-)for(j=1;j40-i;j+)printf( );for(j=1;j=2*i-1;j+)printf(*);printf(n);19#includeint main()int i, a3,sum=0;float p;for(i=0;i=2;i+)ai=(i+1);printf(请输入分数:,i);scanf(%d,&ai);sum+=ai;p=(float)(sum)/i;printf(输出平均分为%fn,p);printf(p=%fn,p);return 0;错#includeint main()int i,t, a10,sum=0;float p;for(i=0;iai+1)t=ai;ai=ai+1;ai+1=t;for(i=2;i=8;) sum+=ai;p=(float)(sum)/8;printf(输出平均分为:);printf(p=%fn,p);return 0; 20简单求和（1+3+5）#includeint main()int i=1,sum=0; while(i=3) sum+=i*2-1;i+;printf(%dn,sum); return 0;注意：1、(i=0时,sum+=2i,i+,n+)(0+2+4+) 2、(i=0时，sum+=i+,n+;)(0+1+2+)21 用Do while限制正数doprintf(请重新输入两个正数（用逗号隔开）：);scanf(%d,%d,&a,&b);while(a0|b0);22 同学和统计平均分#includeint main()int a=0,b,f,s=0;float ave;doprintf(请正确输入同学人数：);scanf(%d,&a);while(a1);/前提控制符合条件for(b=0;ba;b+)/次数限制scanf(%d,&f);s+=f;ave=(float)s/a;printf(ave=%fn,ave);return 0;23 猜数游戏#include#include#includeint main()int k,r,n=1,m,a,b;srand(time(NULL);r=rand()%100+1;printf(欢迎进入猜数游戏n);printf(想猜几次:);scanf(%d,&m); do printf(猜一猜(请输入数字(1100):); scanf(%d,&k); n+;if(k=r)b=n-1; printf(恭喜你第%d次猜对了n,b);return 0;if(kr)printf(太大!n);if(kr)printf(太小!n); while(n=m);a=n-1;printf(呵呵，猜了%d次没猜着,继续加油！n,a); return 0;1 for(i=0;i5;i+) printf(%d ,*(a+i); 2for(i=0;i312#includeint main()int i,j,k; int *p1,*p2,*p3,*p4;printf(输入i,j,k的值分别为（逗号隔开）:); scanf(%d,%d,%d,&i,&j,&k);p1=&i;p2=&j;p3=&k; p4=p2;p2=p1,p1=p3;p3=p4;printf(变换后i,j,k的值分别为:);printf(%d,%d,%d,*p1,*p2,*p3);return 0;25.下标、地址、指针法访问#includeint main()int i,a5=1,3,5,7,9;int *p=a;for(i=0;i5;i+) printf(%d,ai); getchar(); for(i=0;i5;i+)printf(%d,*(a+i); getchar(); for(i=0;i5;i+)printf(%d,*p+); getchar();return 0;26.消除空格#includeint main()char a=chin a;char *p=a;printf(%sn,a);for(;*p!=0;p+)if(*p= )continue;else printf(%c,*p); printf(n); return 0;27.消除指定数#includeint main()char a=china;char c;char *p=a;printf(%sn,a);scanf(%c,&c);for(;*p!=0;p+)if(*p=c)continue;else printf(%c,*p); printf(n); return 0; 28./*1*1+2*2+3*3+n*n=1000求 n?*/#includeint main()int n=0,sum=0; while(sum=1000) n+;sum+=n*n; printf(n=%dn,n-1);return 0;29./*修改*/#includeint main()int s30,num6=0;int i=0,n,j;float sum=0,ave;do printf(请正确输入一个班学生人数:);/*n为人数*/scanf(%d,&n);while(n30);printf(逐个输入学生的同学成绩:n);/*输到si中*/ for(;in;i+) scanf(%d,&si);sum+=si; ave=sum/n;if(si=0&si=60&si=70&si=80&si=90)num4+=1; printf(分数段 学生人数 图形n);printf(=n);printf(60 %d(%.f%)t,num0,num0/(float)n*100);for(j=1;j=num0;j+)printf(*);printf(n);printf(60-69 %d(%.f%)t,num1,num1/(float)n*100);for(j=1;j=num1;j+)printf(*);printf(n);printf(70-79 %d(%.f%)t,num2,num2/(float)n*100);for(j=1;j=num2;j+)printf(*);printf(n);printf(80-89 %d(%.f%)t,num3,num3/(float)n*100);for(j=1;j=90 %d(%.f%)t,num4,num4/(float)n*100);for(j=1;j=num4;j+)printf(*);printf(n);printf(=n);printf(平均分%.2fn,ave);for(i=0;i=ave) num5+; printf(成绩在（全班平均分及平均分之上）的学生人数:);printf(%d个n,num5);printf(不及格人数:);printf(%d个n,num0);printf(不及格的同学有:); for(i=0;in;i+) if(si60) printf(第%d号 ,i+1); printf(n);return 0;30#includeint main()int i,j,n;int a6=12,88,100,92,1,75;printf(对下列数进行排序:n);for(i=0;i6;i+)printf(%d ,ai);for(j=0;j5;j+)for(i=0;iai+1) n=ai;ai=ai+1;ai+1=n;printf(n);printf(第%d趟结果:,(j+1);for(i=0;i6;i+)printf(%d ,ai);return 0; 31./*struct应用格式*/#includeint main()struct z int a,b,c;t;scanf(%d,&t.a);printf(%d,t.a); return 0;32./*调用函数*/#includevoid t(int a, int b) int m,c,d;c=1;d=2;m=ab?c:d;printf(%dn,m);int main()int x,y; printf(输入:);scanf(%d,%d,&x,&y);t(x,y);return 0;33、分科排名#include int main() float str307; int i, j, n , pm=1; float sum=0, ave, findks; doprintf(请正确输入参加考生人数: ); scanf(%d,&n); while(n=0); for(i=0;in;i+)printf(输入考生学号:); scanf(%f,&stri0);printf(分别输入该学号的考生的:数学成绩、英语成绩和物理成绩:n,stri0);for(j=1;j4;j+) scanf(%f,&strij); for(i=0;in;i+) for(j=1;j4;j+) sum+=strij; strij=sum;ave=sum/3; stri5=ave; sum=0; for(i=0;in;i+) for(j=0;jn;j+) if(stri4strj4) pm+=1; stri6=pm;pm=1; printf(n考号 MT EN PH 总分 平均分 排名n); for(i=0;in;i+) for(j=0;j7;j+) printf(%-8g,strij); printf(n); printf(n输入要查找的考生的考号: ); scanf(%f,&findks); for(i=0;in;i+) if(stri0=findks) printf(n考号 MT EN PH 总分 平均分 排名n);for(j=0;j7;j+) printf(%-8g,strij); break;if(i=n)printf(error!没有该考生的信息!n);printf(n);return 0;34、/*掷骰子*/#include stdio.h#include stdlib.h#include conio.h#include time.henum CONTINUE,WON,LOST;int main() int status=CONTINUE; int i=0,j=0,add,k; srand(unsigned)time(NULL); printf(第1场投掷骰子n);while(i=0) i=rand()%6; printf(1:%dn,i); while(j=0) j=rand()&6; printf(2:%dn,j); add=i+j; if(add=11|add=7) status=WON; if(add=2|add=3|add=12) status=LOST; if(status=WON) printf(You Win!n); else if(status=LOST) printf(YOU LOST!n); else for(k=1;k=7;k+) i=0; j=0; printf(第%d场投掷骰子n,k+1); while(i=0) i=rand()%6; printf(1:%dn,i); while(j=0) j=rand()%6; printf(2:%dn,j); if(i+j)=add) status=WON; break; if(status=WON) printf(YOU WIN!n); else printf(YOU LOST!n); getch();return 0;/* 34、* * * *Press any key to continue*/#includeint main()int i,j,k;for(i=0;i4;i+) for(k=0;k8-i;k+)printf( );for(k=0;k8-i;k+)printf(*);for(j=1;j=i;j+)printf(*);printf(n);return 0;/* 35、* * * *Press any key to continue*/#includeint main()int i,j,k;f