#include <stdio.h>  int main(void) {     double a, b, c;     char flag;     int m, n, q, z;       do {      printf("---------------------\n");      printf("easy calculator\n");      printf("---------------------\n");        do {        printf("addition input ' ', subtraction input '-', multiplication input '*', division input '/'\n");        printf("please input you want:")         scanf("%c", &flag);         printf("you input is %c. yes press 1. no press 0 please choose");        scanf("%d", &z);        } while (0 == z);        if (flag == ' ')       m=1;       else if (flag == '-')       m=2;       else if (flag == '*')       m=3;       else if (flag == '/')       m=4;       do {       printf("do a %c b\n",flag);       printf("please input a:");       scanf("%lf",&a);        printf("please input b:");       scanf("%lf",&b);       printf("you want do %lf %c %lf ?? yes input 1, no input 0\n", a, flag, b);        scanf("%d",&q);       } while (0 == q);        switch (m) {        case 1:        c=a b;        break;         case 2:        c=a-b;        break;         case 3:        c=a*b;        break;         case 4:        c=a/b;        break;        }       printf("%lf %c %lf=%lf", a, flag, b, c);      printf("return? yes input 1, no input 0");      scanf("%d", &n);      }while (1 == n);    return 0; }     手机发帖…格式……很乱

晕了……还没发完……

http://blog30.z. qeO5etZaCKCQ1FoDg==&feedcenter_pn=1&type=all&channel=0&back=false&backCount=0&count=8&ic=true&offset=0&dl=&ds=    去我空间看看……我也发了…那个格式好点……

自己编的

我粗心…没加你说的那个;结果……悲剧……这个是我五天的学习弄出来的东西…其实没什么用…就是语句用的多……故意编的的玩的