Very new, trying to loop products.

[TheOriginalTy]

Hi there,

I'm very new and taking an online cpp class. My teacher has a lab due before teaching any of the loop info, so i've been trying to figure it out myself.

My assignment is to make a program that loops products until 0 is entered, and then it displays the product.

So far I have:

#include <iostream>
using namespace std;

int main()
{
int user_input;
int product=1;


cout<<"/\\/\\ The Multiplier /\\/\\"<<endl;



do
{
cout<<"Enter a number to be multiplied"<<endl;
cin>>user_input;
product=product * user_input;


} while (user_input !=0);

cout<<"Product: "<<product;

}



I know that if I output the product before the while statement it comes out correctly, what I don't understand is why it gets reset to 0 after the while statement.

Help? Thanks in advance.

[Browni3141]

Product gets multiplied by every number the user enters, so when the user enters 0 product gets multiplied by 0.

[tubagreg]

It becomes 0 because your process is out of order. First you ask the user for a number, then you process the calculation, then you verify whether it's 0 or not. So, no matter what the user entered previously, product*0 = 0, thus, the loop will exit and print 0.

Make sense?

[Danny Toledo]

Please use tags.

What you are doing is displaying what the product is AFTER the while loop in nullified. To fix this, but the cout<< "Product: "<< product; in the do while loop. I also suggest initializing product at the beginning of the loop:

//...

do
{
     product = 1;
     cout<<"\nEnter a number to be multiplied"<<endl;
     cin>>user_input;
     product=product * user_input;
     cout<<"Product: "<<product;
}
while (user_input !=0);

This works for me.