#include<stdio.h>
#include<stdlib.h>
int    sum(int x,int y)
{
        int   l,k,h,m;
        l=x+y;
        k=x*y;
        h=x-y;
        m=x/y;
        return  l;
        return  k;
        return h;
        return m;
}
main()
{
        int   j,a,b,k,p,i,u,g;
            for(j=0;j<40;j++)
            {
                a=rand()%100;
                b=rand()%100;
            }
            for(g=0;g<10;g++)
            {
                printf("%d+%d=",a,b);
                scanf("%d",&k);
                if(k==sum(a,b))
                    printf("正确\n");
                else   
                    printf("错误\n");
                printf("%d*%d=",a,b);
                scanf("%d",&p);
                    if(p==sum(a,b))
                    printf("正确\n");
                else   
                    printf("错误\n");
                printf("%d/%d=\n",a,b);
                    scanf("%d",&i);
                        if(i==sum(a,b))
                    printf("正确\n");
                else   
                    printf("错误\n");
            printf("%d-%d=",a,b);
                scanf("%d",&u);
                if(u==sum(a,b))
                    printf("正确\n");
                else   
                    printf("错误\n");
               
            }





}

一个函数只能返回一个值，可以返回一个数组或者结构体，然后再判断加减乘除对应的值是否正确

收到的鲜花

• a524797320 于 2013-12-09 08:26 送鲜花  3朵   附言：我很赞同

返回一个数组吧，，，
这样不行的

收到的鲜花

• a524797320 于 2013-12-09 08:23 送鲜花  3朵   附言：但是可以运行！！！请问用数组的话！！+-*/ ...

改了改，自己看看吧

#include<stdio.h>
#include<string.h>
#include<stdlib.h>
#include<time.h>
int fun(int num1,int num2,char flag)
{
    switch(flag)
    {
        case '+':return num1+num2;
        case '-':return num1-num2;
        case '*':return num1*num2;
        case '/':return num1/num2;
    }
}
int main()
{
    int i=0;
    char Y_Q[100];
    int num1,num2,add,sub,mul,div;

    srand((unsigned)time(NULL));
    printf("**********答题开始!**********\n");
    while(1)
    {
        num1=rand()%100;
        num2=rand()%100;

        printf("**********第%2d道题***********\n",++i);

        printf("%d+%d=",num1,num2);
        scanf("%d%c",&add);
        if(add==fun(num1,num2,'+'))
            printf("正确\n");
        else   
            printf("错误\n");
 
        printf("%d-%d=",num1,num2);
        scanf("%d%c",&sub);
        if(sub==fun(num1,num2,'-'))
            printf("正确\n");
        else   
            printf("错误\n");
        
        printf("%d*%d=",num1,num2);
        scanf("%d%c",&mul);
        if(mul==fun(num1,num2,'*'))
            printf("正确\n");
        else   
            printf("错误\n");
        
        printf("%d/%d=",num1,num2);
        scanf("%d%c",&div);
        if(div==fun(num1,num2,'/'))
            printf("正确\n");
        else   
            printf("错误\n");  

        printf("**********第%2d道题结束!**********\n",i);
        
loop:    printf("继续答题(Y/y),退出(Q/q):");
        scanf("%s",Y_Q);
        if(strlen(Y_Q)==1)
        {
            if(Y_Q[0]=='Y'||Y_Q[0]=='y')
                continue;
            else
            if(Y_Q[0]=='Q'||Y_Q[0]=='q')
                break;
        }
        goto loop;
    }
    printf("**********结束答题!**********\n");
    return 0;
}

[ 本帖最后由 小小战士 于 2013-12-8 13:09 编辑 ]

收到的鲜花

• a524797320 于 2013-12-09 08:21 送鲜花  3朵   附言：好文章