Thread: Pre-incrementoperators and post-increment operators

  1. #1
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    Pre-incrementoperators and post-increment operators

    Hi, i bought a book about C and now im in chapter 6, theyre explaing stuff about Pre-incrementoperators and post-increment operators, but i dont really understand what they do. Please help me!

  2. #2
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    Sep 2001
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    It just changes when the increment occours...
    Code:
    #include <stdio.h>
    int main ()
    {
     int x = 3;
     printf ("%d x\n", x); // Prints 3
     printf ("%d x++\n", x++); // Prints 3 again, then increments x to 4...
     printf ("%d x\n", x); // x is now 4, so prints 4.
     printf ("%d ++x\n", ++x); // Increments x to 5, then prints x (5)
     printf ("%d x\n", x); // x is now 5, so prints 5
     return 0;
    }
    If the line has ++x, then x is incremented before the line is evaluated. If the line has x++, then the line is evaluated before x is evaluated.
    Callou collei we'll code the way
    Of prime numbers and pings!

  3. #3
    Guest Sebastiani's Avatar
    Join Date
    Aug 2001
    Location
    Waterloo, Texas
    Posts
    5,708
    Very elegant explanation there, QC! Kudos!
    Code:
    #include <cmath>
    #include <complex>
    bool euler_flip(bool value)
    {
        return std::pow
        (
            std::complex<float>(std::exp(1.0)), 
            std::complex<float>(0, 1) 
            * std::complex<float>(std::atan(1.0)
            *(1 << (value + 2)))
        ).real() < 0;
    }

  4. #4
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    Exclamation

    What???

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