#include <stdio.h>
int a, b;
char x;
int main()
{
    printf("Nhap phep toan: ");
    scanf("%c", &x);
	printf("Nhap 2 so: "); 
	scanf("%d %d", &a, &b);
    switch(x)
    {
        case '+':
        {
            printf("%d + %d = %d", a, b, a + b);
            break;
        }
        case '-':
        {
            printf("%d - %d = %d", a, b, a - b);
            break;
        }
        case '*':
        {
            printf("%d * %d = %d", a, b, a * b);
            break;
        }
        case '/':
        {
            if(b == 0)
            {
                printf("Khong the chia cho 0!");
            }
            else
            {
                printf("%d / %d = %2f", a, b, (float)a / b);  
        		break;
        	}
        }
        default:
        {
            printf("Khong co phep toan");
            break;
        }
    }
	return 0; 
}