惭愧了。。。。。。。。。

#include <stdio.h>
#include <stdlib.h>
char g;
void fun()
{int i,a,b,c=0,s=0;
for(i=1;i<=10;i++)
{
    do{a=rand()%181+20;b=rand()%8+2;}
    while(a%b);
printf("%d/%d=\n",a,b);
scanf("%d",&c);
if(c==a/b){printf("right answer!\n");s++;}
else printf("error answer!\n");
}
printf("score=%d\n",10*s);
printf("once again?(y/n)\n");
scanf("%d",&g);
g=getchar();
//return g;
}
 
void main(void)
{
fun();
while(1)
{
    if(g!='n')
        fun();
    else break;
}
 
}