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>
#include <string.h>
int main(int argc, const char * argv[]) {
    int a,b;
    int answer=0;
    char op[2];
    
    while(1){
        scanf("%d %c %d",&a,op,&b);//読み込み
        
        if(strcmp(op,"+")==0){
            answer = a + b;//＋のとき和
        }else if(strcmp(op,"-")==0){
            answer = a - b;//ーのとき差
        }else if(strcmp(op,"*")==0){
            answer = a * b;//＊のとき積
        }else if(strcmp(op,"/")==0){
            answer = a / b;// /のとき商
        }else if(strcmp(op,"?")==0){
            break;
        }
        
        printf("%d",answer);

    }

    return 0;
}