#include <stdio.h>
int main()
{
	int val1, val2;
	printf("Vui long nhap val1  val2 :");
	scanf_s("%d %d", &val1, &val2);
	if (val2 == 0)
		printf("Vui long nhap lai");
	else
	{
		printf("%d+%d=%d\n", val1, val2, val1 + val2);
		printf("%d-%d=%d\n", val1, val2, val1 - val2);
		printf("%d*%d=%d\n", val1, val2, val1 * val2);
		printf("%d/%d=%d\n", val1, val2, val1 / val2);
	}
	return 1;
}
//{
	//double val1, val2;
	//printf("Vui long nhap  val1  val2 :");
	//scanf_s("%lf %lf", &val1, &val2);
	//if (val2 == 0)
		//printf("Vui long nhap lai");
	//else
	//{
		//printf("%lf+%lf=%lf\n", val1, val2, val1 + val2);
		//printf("%lf-%lf=%lf\n", val1, val2, val1 - val2);
		//printf("%lf*%lf=%lf\n", val1, val2, val1 * val2);
		//printf("%lf/%lf=%lf\n", val1, val2, val1 / val2);
	//}
	//return 1;
//}
// Doi voi cac truong hop cong tru va nhan thi ket qua cua 2 dang nay la giong nhau, chi khac nhau cach hien thi. 
//Rieng doi voi phep chia tuy la ky hieu nhu nhau (/) nhung cho ra 2 ket qua khac nhau.
//Voi dang so nguyen thi day la phep chia tinh thuong so. Con so thuc la cho ra ket qua la gia tri thuc ke ca phan le neu khong chia het.