[C++] Greatest Common Factor Of Two Numbers

Here's a program that will ask for two numbers then give the greatest common factor.

Source Code:

Code:

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#include <iostream.h>

void GCF(int x, int y)
{
    int z, l=1;//i'm setting l and will use it as a loop
    z=y+1;
   
    while(l!=0)//keep looping until l is 0, which it wont be, unless common factors are found
    {
          z--; //subtracts from number
         
          if(y%z == 0 && x%z == 0) // if remainders equal zero, set l to zero, so it can display that number
          {
                l=0;
          }
    }
    cout<<"The GCF is: "<<z<<endl; //z is now the GCF
}
int main()
{
    int x, y;
   
    cout<<"Enter a number: ";
    cin>>x;
    cout<<"Enter another number: ";
    cin>>y;
    if(x>y)  //if and else statements take care of different inputs, and call the void function above.
    {
          GCF(x, y);
    }
    else
    {
        GCF(y, x);
    }
   
    system ("PAUSE");
    return 0;
}

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