C++

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Loops

Frankie1210 (20)
Can someone help me with my code? The prompt is Design a program that contains a loop that asks the user to enter a series of positive numbers.The user should enter a negative number to signal the end of the series. After all the positive numbers have been entered, the program should display their sum

This is what i have so far...
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 #include <iostream>

using namespace std;

float loopCalculateSum(float sum);
void showResults();

int main()


{
	//Inititalize variable
	float sum = 0;
	

	// Call to loop function
	sum = loopCalculateSum(sum);

	//Delay
	char quitKey;
	cout << "Press any key and Enter to end program: ";
	cin >> quitKey;

	//End of Program
	return 0;
}


// Loop function

float loopCalculateSum(float sum)

{
	int userInput = 0;
	do {
		cout << "Enter a postive number" << endl;
		cin >> userInput;

		sum = sum + userInput;
		cin >> sum;

		userInput++;
	} while (userInput >= 0);

	return sum;
}
rathpanha (16)
The user should enter a negative number to signal the end of the series.

I don't clear about this sentence can you explain again.
MiiNiPaa (8886)
Your problem is that you are adding input before checking its sign. Also you reading into sum for some reason.

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//Strongly prefer double to float
double loopCalculateSum(/*you do not need argument here*/)
{
    //Why there was int? Either have int as return type too or make input floating point
    double input;
    double sum;
    while(std::cin >> input && input >= 0) 
        sum += input;
    return sum;
}
dhayden (5798)
Don't forget to initialize sum to 0.0
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