case转换错误在main函数中~~~拜托帮忙看下怎么回事啊 - C语言论坛

已结贴√ 问题点数：20 回复次数：3

case转换错误在main函数中~~~拜托帮忙看下怎么回事啊

#include <stdlib.h>
#include <time.h>
#include <stdio.h>
#include <math.h>
main()
{
    int data1,data2,i;
    int count=0;
    int reply;

    srand(time(NULL));

    while( count < 10 )
    {
        i=rand()%4+1;

        switch(i)
        case 1:
        {
            data1=rand()%11;
            data2=rand()%11;

            printf("%d+%d=",data1,data2);
            scanf("%d",&reply);
        }
            break;

        case 2:
        {
            data1=rand()%11;
            data2=rand()%11;

            while (data1<data2)
            {
                data1=rand()%11;
                data2=rand()%11;
            }
            printf("%d-%d=",data1,data2);
            scanf("%d",&reply);
        }
            break;

        case 3:
        {
            data1=rand()%11;
            data2=rand()%11;

            printf("%d*%d=",data1,data2);
            scanf("%d",&reply);
        }
            break;

        case 4:
        {
            data1=rand()%11;
            data2=rand()%11;

            while(data2==0)
            {
                data1=rand()%11;
                data2=rand()%11;
            }

            while(data2!=0)
            {
                int x=fmod(data1,data2);
                while(x!=0)
                {
                    data1=rand()%11;
                    data2=rand()%11;
                }
            }

            printf("%d/%d=",data1,data2);
            scanf("%d",&reply);
        }
            break;

        count++;
    }
  }

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第 2 楼

得分:0

修改以后的代码，测试通过。

程序代码：

#include <time.h>
#include <stdio.h>

int main(void) {
    int data1,data2,i;
    int count=0;
    int reply;

    srand(time(NULL)); //个人感觉srand((unsigned)time(NULL))比较好。

    while( count < 10 )
    {
        i=rand()%4+1;

        switch(i) {          //switch语句要用大括号包好
        case 1:

            data1=rand()%11;
            data2=rand()%11;

            printf("%d+%d=",data1,data2);
            scanf("%d",&reply);

            break;

        case 2:

            data1=rand()%11;
            data2=rand()%11;

            while (data1<data2)
            {
                data1=rand()%11;
                data2=rand()%11;
            }
            printf("%d-%d=",data1,data2);
            scanf("%d",&reply);

            break;

        case 3:

            data1=rand()%11;
            data2=rand()%11;

            printf("%d*%d=",data1,data2);
            scanf("%d",&reply);

            break;

        case 4:

            data1=rand()%11;
            data2=rand()%11;

            while(data2==0)
            {
                data1=rand()%11;
                data2=rand()%11;
            }

            while(data2!=0)
            {
                int x=fmod(data1,data2);
                while(x!=0)
                {
                    data1=rand()%11;
                    data2=rand()%11;
                }
            }

            printf("%d/%d=",data1,data2);
            scanf("%d",&reply);

            break;
                }

        count++;
    }
                return 0;    
}

[ 本帖最后由 ansic 于 2011-3-19 17:05 编辑 ]

善人者，不善人之师；不善人者，善人之资。不贵其师，不爱其资，虽智大迷。

第 3 楼

得分:0

测试一下，会产生死循环呀

善人者，不善人之师；不善人者，善人之资。不贵其师，不爱其资，虽智大迷。

第 4 楼

得分:20

修改完毕

程序代码：

root@~ #
root@~ #cat 1.c
#include <time.h>
#include <stdio.h>

int main(void) {
    int data1,data2,i;
    int count=0;
    int reply;

    srand((unsigned)time(NULL));

    while(count<10){
        i=rand()%4+1;
    
        switch(i) {
        case 1:

            data1=rand()%11;
            data2=rand()%11;

            printf("%d+%d=",data1,data2,data1+data2);
            scanf("%d",&reply);

            break;

        case 2:

            data1=rand()%11;
            data2=rand()%11;

            while (data1<data2)
            {
                data1=rand()%11;
                data2=rand()%11;
            }
            printf("%d-%d=",data1,data2,data1-data2);
            scanf("%d",&reply);

            break;

        case 3:

            data1=rand()%11;
            data2=rand()%11;

            printf("%d*%d=",data1,data2,data1*data2);
            scanf("%d",&reply);

            break;

        case 4:

            data1=rand()%11;
            data2=rand()%11+1; //data2永远不会是0啦

            printf("%d/%d=",data1,data2,data1/data2);
            scanf("%d",&reply);

            break;
                }

        count++;
    }
                return 0;
}
root@~ #

root@~ #./1
4-2=2
10/5=2
4*8=32
0/11=11
7/9=0
0*4=0
10/4=2
9*9=81
4-4=0
2*7=14
root@~ #

善人者，不善人之师；不善人者，善人之资。不贵其师，不爱其资，虽智大迷。