الكود:

/* C++ Program to Find Sum and Average of three numbers  */

#include<iostream>
using namespace std;

int main()
{
    float a,b,c,sum,avg;
    cout<<"Enter 1st number :: ";
    cin>>a;
    cout<<"\nEnter 2nd number :: ";
    cin>>b;
    cout<<"\nEnter 3rd number :: ";
    cin>>c;

    sum=a+b+c;

    avg=sum/3;

    cout<<"\nThe SUM of 3 Numbers [ "<<a<<" + "<<b<<" + "<<c<<" ] = "<<sum<<"\n";
    cout<<"\nThe AVERAGE of 3 Numbers [ "<<a<<", "<<b<<", "<<c<<" ] = "<<avg<<"\n";

    return 0;
}

/* C++ Program to Find Sum and Average of three numbers */

Enter 1st number :: 3

Enter 2nd number :: 4

Enter 3rd number :: 5

The SUM of 3 Numbers [ 3 + 4 + 5 ] = 12

The AVERAGE of 3 Numbers [ 3, 4, 5 ] = 4