C++ Program in Visual Studio with comment please,So i can follow im trying to wo

Question

C++ Program in Visual Studio with comment please,So i can follow im trying to work on the Euler Projects.

The sum of the squares of the first ten natural numbers is,

12 + 22 + ... + 102 = 385

The square of the sum of the first ten natural numbers is,

(1 + 2 + ... + 10)2 = 552 = 3025

Hence the difference between the sum of the squares of the first ten natural numbers and the square of the sum is 3025 ? 385 = 2640.

Find the difference between the sum of the squares of the first one hundred natural numbers and the square of the sum.

Explanation / Answer

#include<iostream.h>
#include<conio.h>

void main()
{
clrscr();   
unsigned long n,i,sum=0,sum1=0,d;
cout<<"Enter any number"; // enter the n, for your case n=100
cin>>n;

for(i=1;i<=n;i++)
{
d=i*i;
sum=sum+d; // sum=sum of squares=1^2+2^2+....n^2

sum1=sum1+i; // sum of numbers=1+2+...n
}
sum1=sum1*sum1; // square of sum
cout<<endl<<"Difference between sum of squares and square of sum= "<<sum-sum1;
getch();
}

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