求两个整数的和，差，积和平准值


#include <stdio.h>
int main()
{
int a, b, sum,dif,pro,aiv;

printf("输入两个数(以空格分割): ");
scanf("%d %d", &a, &b);
sum = a + b;
dif = a - b;
pro = a * b;
aiv = (a + b)/2;
printf("%d + %d = %d\n", a, b, sum);
printf("%d - %d = %d\n", a, b, dif);
printf("%d * %d = %d\n", a, b, pro);
printf("平准值是: %d",aiv);
return 0;
}