Thread: Program to calculate factorials

  1. #1
    Registered User
    Join Date
    Sep 2001

    Question Program to calculate factorials

    OK, I know that this will seem a pitifully stupid question to anyone with any programming knowledge, but here goes anyway.

    I'm new to C++ and I need to write a program to calculate factorials from an integer input. It's not so much a language difficulty with C++ as a logical problem.

    Beginning with a factor of 1, I need a loop which multiplies the user input number by the factor, adds 1 to the factor, then multiplies the previous result by the new factor, continuing until the factor=(starting number - 1). Can anyone help?

  2. #2
    l'Anziano DavidP's Avatar
    Join Date
    Aug 2001
    Plano, Texas, United States
    is this what u mean:

    int factorial (int number)
    if(number > 1) return (number * factorial(number - 1));
    else return 1;

    That should work.
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    "Circular logic is good because it is."

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