第十周项目3（1）实现基本功能

#include <stdio.h>#include <stdlib.h>#include<time.h>int main(){    int i,a,b,d,n;   float r,count=0;    srand(time(0));    for(i=1;i<=10;i++)    {        a=rand()%10+1;        b=rand()%10+1;        d=a+b;        printf("%d + %d=?\n",a,b);        scanf("%d",&n);        if(d==n)        {            printf("yes\n");            count++;        }        else            printf("wrong\n");    }    r=count/10;    printf("%f",r);}