How to decrement vector elements and handle negative values in C++.

[needOfHelpCMath]

I am stuck on now to decrement the numbers and would like some help please.

Write a loop that subtracts 1 from each element in lowerScores. If the element was already 0 or negative, assign 0 to the element. Ex: lowerScores = {5, 0, 2, -3} becomes {4, 0, 1, 0}.

#include <iostream>
#include <vector>
using namespace std;

int main() {
   const int SCORES_SIZE = 4;
   vector<int> lowerScores(SCORES_SIZE);
   int i = 0;

   lowerScores.at(0) = 5;
   lowerScores.at(1) = 0;
   lowerScores.at(2) = 2;
   lowerScores.at(3) = -3;

   /* Your solution goes here  */  for (i = 0; i < SCORES_SIZE; ++i) { 
if (lowerScores.at(i) < SCORES_SIZE) { 
lowerScores.at(i) = 0;

}
  }  
  
   for (i = 0; i < SCORES_SIZE; ++i) {
      cout << lowerScores.at(i) << " ";
   }
   cout << endl;

   return 0;
}

Testing for lowerScores = {5, 0, 2, -3}
Expected output: 4 0 1 0
Your output: 5 0 2 0

 

[MarkFL]

In the following for-loop:

  for (i = 0; i < SCORES_SIZE; ++i) { 
if (lowerScores.at(i) < SCORES_SIZE) { 
lowerScores.at(i) = 0;

}
  }

You have code that will set the array value to zero if the value there is less than [M]SCORES_SIZE[/M]. However, what you want is code that will set the array value to zero if the value is not positive, otherwise you want to decrement it. So, I would try something like:

for (i = 0; i < SCORES_SIZE; i++)
{
	if (lowerScores.at(i) > 0)
	{
		lowerScores.at(i)--;
	}
	else
	{
		lowerScores.at(i) = 0;
	}
}