Question

Using C++, find the sum of the squares of the integers from 1 to MySquare, where MySquare is input by the user. Be sure to check that the user enters a positive integer.

Answer 1

Code with explanation in comments:

#include<iostream>

using namespace std;

int main()
{
//unsigned long variable will let
//user to enter only positive value only.
   unsigned long MySquare,i,sum=0,dummy;
   cout<<"Enter a positive number:";
   cin>>MySquare;
  
   //find the sum of the squares of the +ve integers
   //from 1 to MySquare
   for(i=1;i<=MySquare;++i)
   {
   //store the sqaure of i in dummy variable
   dummy=i*i;
   //store the sum of square of +ve integers from 1 to MySquare in sum variable.
       sum+=dummy;
   }
  
   //print the sum of squares of the +ve integers
   //from 1 to MySquare
   cout<<"\nSum = "<<sum;
  
   return 0;
}

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Snapshot of Code and the output:

Output:

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It will let the user to enter only positive value else it will throw error: