**Sum Square Difference** also known as problem 6 is very straight forward math… (A) calculate the summation of the numbers squared, and (B)then the square of the summation… then subtract A from B… my solution for this problem is below in C++

```
#include <iostream>
#include <string>
#include <sstream>
using namespace std;
int main(){
int sumfirsthundred = 0;
int squarefirsthundred = 0;
int sumfirsthundredsqr = 0;
for(int i = 1; i < 101; i++){
sumfirsthundred = sumfirsthundred + i;
squarefirsthundred = squarefirsthundred + (i*i);
}
sumfirsthundredsqr = sumfirsthundred * sumfirsthundred;
cout << sumfirsthundredsqr - squarefirsthundred << "n";
std::cout << "Press ENTER to continue...";
std::cin.ignore( std::numeric_limits<std::streamsize>::max(), 'n' );
return 0;
}
```