KH Assignment 2

assignment2.c++

#include <iostream>
using namespace std;

int n, i, j; //We initialize the variables.
            //we don't give a shit what is in there (garbage atm)
            
int sum=0; //this time we DO care what it is. our sum starts at 0.

//I think main has to take parameters for it to be legal.
//I haven't coded C++ in a while, sorry.
//Maybe double check this from examples.
int main() {
  
  cout << "Enter a positive integer: ";
  cin >> n;
  //So n is now our user's number.
  j = n;
  //Now j=n, but that will change in our loop.
  
  for ( i=1; i<=n; /*do nothing*/)
  //Don't know how familiar you are with for loops yet. But basically,
  //this is what the for loop definition line means:
  // - At the beginning of the loop, i is set to 1.
  // - The loop only runs while i <= n.
  // - Every time the loop finishes running, we do nothing.
  //	(I could put something instead of "do nothing" but I put it in the loop.)
  {
    //i starts at 0 and increases by one every iteration.
    //j starts at whatever the user enters (n) and decreases by one each iteration.
    //so this follows the form of the assignment,
    // 1*n + 2*(n-1) + 3*(n-2) + ... + (n-1)*2 + n*1
    cout << i*j << endl;
    sum = sum + i*j;   
    
    //here we increase i and decrease j, in preparation for the next iteration.
    i++; j--;
  }
  
  //once we reach here we are done iwth the loop. so we print the sucker.
  cout << "The sum is " << sum << endl;
  
  //I did not write a loop to allow the user to go again.
  //If you need help with that then let me know.  
  
}