#include <stadio.h>
int main (void)
{
float sum=0.0,avg=0.0;
printf("请输入两个整数:");
scanf("%d\n%d\n",&a&b);
sum=a+b;
avg=sum/2;
printf("两个数的和为：%d\n",sum);
printf("两个数的平均数为%f\n",avg);
       return 0;
}

很谢谢你！啵啵