编程四则运算

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

#define x 6

int Test()
{
int num = 0;
int answer = 0;
int result = 0;
int a = 0;
int n = 0;
char op = 0;

int count = x;
while ( count-- )
{
a = rand() % 10;
n = rand() % 10;
op = rand() % 4;

switch ( op )
{
case 0:
op = '+';
answer = a+n;
break;
case 1:
op = '-';
answer = a-n;
break;
case 2:
op = '*';
answer = a*n;
break;
case 3:
n++;
op = '/';
answer = a/n;
break;
default:
break;
}

printf("\n题目:");
printf("%d%c%d=?\n", a, op, n);
printf("输入答案:");
scanf("%d", &result);

if ( answer == result )
num++;
}

return num;
}

int main()
{
srand( time(NULL) );

printf("开始答题:\n");
printf("你一共答对le%d道题目。\n", Test());
return 0;
}