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: Wrong Answer)

process.stdin.resume();
process.stdin.setEncoding('utf8');
process.stdin.on('data', function (chunk) {
    var input = chunk.split("\n");
    var output = "";
    
    for(var i = 0; i < input.length; i ++){
        var r = calc(input[i]);
        if(r !== false){
            console.log(r);
        }
    }
    
    function calc(input){
        var nums = input.split(" ");
        nums[0] = Number(nums[0]);
        nums[2] = Number(nums[2]);
        if(nums[1] == "+"){
            return nums[0] + nums[2];
        }
        else if(nums[1] == "-"){
            return nums[0] - nums[2];
        }
        else if(nums[1] == "*"){
            return nums[0] * nums[2];
        }
        else if(nums[1] == "/"){
            return nums[0] / nums[2];
        }
        else if(nums[1] == "?"){
            return false;
        }
        
    }
});