testArithmetic_2

#include <stdio.h>
#include <stdlib.h>

void showResult(int);

void showResult(int n3) {
    printf("answer = ");
    printf("%d\n", n3);
}

int main(int argc, char *argv[]) {
    int n1 = 0;
    int n2 = 0;
    char selectSymbol = ' ';
    char clearChar = ' ';

    printf("Enter two number: ");
    scanf("%d %d", &n1, &n2);

    /* clear buffer */
    while ((clearChar = getchar()) != EOF && clearChar != '\n');

    printf("Enter operator: ");
    scanf("%c", &selectSymbol);

    int ans = 0;

    switch (selectSymbol) {
        case '+':
            ans = n1 + n2;
            break;
        case '-':
            ans = n1 - n2;
            break;
        case '*':
            ans = n1 * n2;
            break;
        case '/':
            ans = n1 / n2;
            break;
        default:
            /* do nothing */
            break;
    }

    showResult(ans);

    printf("\n");
    system("pause");
    return 0;
}