PTA 7-6 简单计算器 (10分)

Posted 2021-03-04

```#include<stdio.h>
int main()
{
    int a, b, c, count = 0;
    char ch;
    scanf("%d", &a);
    while ((ch = getchar()) != ‘=‘)
    {
        scanf("%d", &b);
        if ((ch == ‘/‘) && (b == 0))
        {
            count = 1; break;
        }
        switch (ch)
        {
        case ‘+‘: a = a + b; break;
        case ‘-‘:a = a - b; break;
        case ‘*‘:a = a * b; break;
        case ‘/‘:a = a / b; break;
        default:
            count = 1; break;
        }
        if (count) break;
    }
    if (count)
    {
        printf("ERROR");
    }
    else
    {
        printf("%d", a);
    }
    return 0;
}