#include< iostream.h>
#include< conio.h>
void main() // can use int but last u have to return 0.
{
 int a,b,c,d,sum,avg;
 cout<<"Enter the four numbers:\n";
 cin>>a>>b>>c>>d;
 sum=a+b+c+d;
 cout<<"The sum of the numbers is:"<< sum <<"\n";
 avg=sum/4;  /* devide it by the number of numbers you enter
    for ex. you entered 7 number divide by 7*/
 cout<<"The average of the numbers is:"<< avg;
 // return 0;  (if using int main)
 }
/* if you copy this code please remove space in header files , sum and avg.
