Problem:
Simple Calculator

Write a program which reads two integers a, b and an operator op, and then prints the value of a op b.

The operator op is '+', '-', '*' or '/' (sum, difference, product or quotient). The division should truncate any fractional part.

Input

The input consists of multiple datasets. Each dataset is given in the following format.

a op b

The input ends with a dataset where op = '?'. Your program should not process for this dataset.

Output

For each dataset, print the value in a line.

Constraints

0 ≤ a, b ≤ 20000

No divisions by zero are given.

Sample Input 1

1 + 2
56 - 18
13 * 2
100 / 10
27 + 81
0 ? 0

Sample Output 1

3
38
26
10
108

Solution in C (judge verdict: Time Limit Exceeded)

#include<stdio.h>
int main(){
  int a;
  int b;
  char op;
  scanf("%d %c %d", &a, &op, &b);
  for(;;){
    if(op == '+'){
      printf("%d\n", a + b);
    }
    else if(op == '-'){
      printf("%d\n", a - b);
    }
    else if(op == '*'){
      printf("%d\n", a * b);
    }
    else if(op == '/'){
      printf("%d\n", a / b);
    }
    else if(op == '?'){
      return 0;
    }
    else{
        break;
    }
  }
}