testArithmetic_1

#include <stdio.h>

void A(int n3) {
    printf("答案是：");
    printf("%d\n", n3);
}

int main(int argc, char *argv[]) {
    int n1 = 0;
    int n2 = 0;
    char c = ' ';
    char clearChar = ' ';
    printf("輸入二個數字：");
    scanf("%d %d", &n1, &n2);
    while ((clearChar = getchar()) != EOF && clearChar != '\n');/* 清空緩衝區 */
    printf("輸入一個符號：");
    scanf("%c", &c);
    int n3 = 0;
    if (c == '+') {
        n3 = n1 + n2;
    }
    else {
        if (c == '-') {
            n3 = n1 - n2;
        }
        else {
            if (c == '*') {
                n3 = n1 * n2;
            }
            else {
                if (c == '/') {
                    n3 = n1 / n2;
                }
                else {
                    /* do nothing */
                }
            }
        }
    }
    A(n3);

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