switch Calculator

Lab C Beginner 10 points

Read a op b where op is one of + - * /. Print the result (integer division), division by zero, or unknown operator, using switch.

Input

One line: integer, operator, integer.

Output

One line.

Example

Input

6 * 7

Output

Sample input available Sample output available

Editor

Hints

switch on a char uses case '+':

Don't forget break, or execution falls into the next case.

Solution explanation

switch compares one value against constant cases; default catches the rest.

Show solution

#include <stdio.h>

int main() {
    int a, b;
    char op;
    scanf("%d %c %d", &a, &op, &b);
    switch (op) {
        case '+':
            printf("%d\n", a + b);
            break;
        case '-':
            printf("%d\n", a - b);
            break;
        case '*':
            printf("%d\n", a * b);
            break;
        case '/':
            if (b == 0) {
                printf("division by zero\n");
            } else {
                printf("%d\n", a / b);
            }
            break;
        default:
            printf("unknown operator\n");
    }
    return 0;
}

Output

Answer