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 <iostream>
using namespace std;

int main(void) {
  while(1) {
    int a, b;
    char op;
    cin >> a >> op >> b;

    switch(op) {
      case '+': 
        cout << a+b << endl;
      case '-':
        cout << a-b << endl;
      case '*':
        cout << a*b << endl;
      case '/':
        cout << a/b << endl;
      case '?':
        break;
      default:
        break;
    }
  }
  return 0;
}