HDOJ 1170 Balloon Comes!

       简单题，读取运算符和两个数字进行相应的计算。

#include <cstdio>char opr[2];//#define yangyuanint main(){#ifdef yangyuanfreopen("in", "r", stdin);#endif    int n, a, b;    scanf("%d", &n);    while (n--){scanf("%s%d%d", opr, &a, &b);        switch (opr[0])        {case '+':            printf("%d\n", a + b);break;case '-':printf("%d\n", a - b);break;case '*':            printf("%d\n", a * b);break;case '/':            if (a % b)                printf("%.2f\n", (double)a / b);elseprintf("%d\n", a / b);break;        }}    return 0;}