This is a question about the c language switch statement's private rule calculation program!!

while (1) {
    printf("+ - * / Select one: ");
    scanf("%c", &option);
    getchar();
    switch (option) {
    case'+':
        printf ("Enter two values: ");
        scanf("%d %d", &num1, &num2);
        getchar();
        printf("%d + %d = %d\n", num1, num2, num1 + num2);
        break;
    case'-':
        printf ("Enter two values: ");
        scanf("%d %d", &num1, &num2);
        getchar();
        printf("%d - %d = %d\n", num1, num2, num1 - num2);
        break;
    case'*':
        printf ("Enter two values: ");
        scanf("%d %d", &num1, &num2);
        getchar();
        printf("%d x %d = %d\n", num1, num2, num1 * num2);
        break;
    case'/':
        printf ("Enter two values: ");
        scanf("%d %d", &num1, &num2);
        getchar();
        printf("%d / %d = %d (volume output)\n", num1, num2, num1 / num2);
        break;
    default:
        printf("Please re-enter!!!!\n");
        continue;
    }
    break;
}