입력 계산기: scanf

#include <stdio.h>

int main(void) {
    int a = 0;
    int b = 0;
    int sum = 0;
    int minus = 0;
    int mul = 0;
    int divide = 0;
    
    scanf("%d",&a);
    scanf("%d",&b);
    
    sum = a+b;
    minus = a-b;
    mul = a*b;
    divide= b/a;
    printf("a+b=%d\n", sum );
    printf("a-b=%d\n", minus);
    printf("a*b=%d\n", mul );
    printf("b/a=%d\n", divide );
    
    return 0;
}