[C] 초간단 계산기

#include <stdio.h>
void main()
{
    int data1, data2, total;
    char oper;

    printf("연산자를 입력하세요? (+, -, *, /, %) : ");
    scanf("%c", &oper);
    printf("첫번째 피연산자를 입력하세요 : ");
    scanf("%d", &data1);
    printf("두번째 피연산자를 입력하세요 : ");
    scanf("%d", &data2);

    switch(oper)
    {
        case '+' :
            total = data1 + data2;
            break;

        case '-':
            total = data1 - data2;
            break;

        case '*':
            total = data1 * data2;
            break;

        case '/':
            total = data1 / data2;
            break;

        case '%':
            total = data1 % data2;
            break;
    }
    printf("계산결과 : %d %c %d = %d \n", data1,oper,data2,total);
}