Pre-incrementoperators and post-increment operators

This is a discussion on Pre-incrementoperators and post-increment operators within the C Programming forums, part of the General Programming Boards category; Hi, i bought a book about C and now im in chapter 6, theyre explaing stuff about Pre-incrementoperators and post-increment ...

  1. #1
    Unregistered
    Guest

    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
    Registered User
    Join Date
    Sep 2001
    Posts
    752
    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
    5,652
    Very elegant explanation there, QC! Kudos!
    Code:
    #include <ip.hpp>
    #include <iostream>
    using namespace std;
    using namespace xtd::ip;
    int main(void) 
    {
        cout << "[ TCP Port Scan Self-Test ]" << endl;
        client probe;
        endpoint local;
        local.address = "127.0.0.1";
        local.protocol = IPPROTO_TCP;
        for(local.port = 0; local.port < (1 << 16); ++local.port)
        {
            if(probe.open(local))
                cout << "Listening: ";
            else
                cout << "No Response: ";
            cout << local.port << endl;
        }    
    }

  4. #4
    Unregistered
    Guest

    Exclamation

    What???

Popular pages Recent additions subscribe to a feed

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21