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 JavaScript (judge verdict: Accepted)

function Main(input) {
  input = input.split("\n");
  var i = 0;
  var result = NaN;
  while(1){
    var tmp = input[i++];
    tmp = tmp.split(' ');
    switch(tmp[1]){
      case '+':
        result = parseInt(tmp[0]) + parseInt(tmp[2]);
        break;
      case '-':
        result = tmp[0] - tmp[2];
        break;
      case '*':
        result = tmp[0] * tmp[2];
        break;
      case '/':
        result = Math.floor(tmp[0] / tmp[2]);
        break;
      case '?':
        result = NaN;
        break;
    }
    if(isNaN(result)){
      break;
    }else{
      console.log(result);
    }
  }
}
Main(require("fs").readFileSync("/dev/stdin", "utf8"));