#include <stdio.h>
int main()
{
int a,b,c,d;
float sum=0,ave;
printf("input 4 int data:\n");
scanf("%d %d %d %d", &a, &b, &c, &d);
sum=a+b+c+d;
ave=((int)(sum / 4.0*10))/10.0;
printf("sum=%d mean=%.1f\n",sum,ave);
return 0;
}
