C Programming Tutorials

C Programming Tutorials And Articles
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Memory Segment Whenever U create a program and load it on a CPU ie executing UR program. It loads a Process Page on the virtual memory of UR system.That Process page will be mapped to UR Task Struct which will be in UR Process Control Block PCB. ...
EIP ( Extended Instruction Pointer ) is a register that points to the next instruction...It simply points to the address in which that instruction is placed...So if we overwrite this we can change the direction flow of the program and make it do what we want.... In other words if we overwrite...
Stack memory Let's suppose there is nothing on the stack to begin with. One of the functions either the calling function or the called function depending on the calling convention would start a stack. Lets take a very simple C / C++ program to see how things would work. int func(int i) {...
Strings are paramount datatype for any real use case scenario. However, in C, there is no basic datatype as ‘string’. A string is understood as a collection set of characters i.e. in programmatic language, an array of characters, which are: Directly assigned in double quotes Terminated by a...
The code below swaps two nodes in the linked list. The swap operation can be helpful in sorting a linked list and so its very important how to swap the nodes of linked list. Swapping in normal arrays is swap of the data but in linked list its the pointers change and so there is just change in...
The code to swap two variables using macro expansions #include<stdio.h> #include<conio.h> #define SWAPE(x,y) int t;t=x;x=y;y=t; main() { int a,b;
A Program to check whether entered matrix is symmetric or not. #include<stdio.h> #include<conio.h> main() { int a,at,k,i,j,m,n; clrscr(); printf("enter the order of matrix"); scanf("%d %d",&m,&n);
Introduction The Source code that follows is for Tetris using BGI under Turbo C/C++ DOS compiler. It is still in the preliminary stages of development and there is a long way to go. Now, this is a demo version where the user isnt supposed to 'play' the game but be a mute spectator - it just...
Introduction The aim of this article is to explain the upcasting. Before going through this article I expect people have some preliminary idea about inheritance mechanism. Background The term upcasting comes from the class inheritance diagram. In the class inheritance diagram we...
Continuing the previous discussion that we did on Unix Threads (Basics) , today we will discuss the concept of 'Thread Synchronization'. Going through a quick recap, we now know that threads are used to make calls to functions non-blocking (asynchronous). One important point that we did not discuss...
Hello My first game of TicTacToe and thought I will put the same here after the Game of Mojo and Max 8 Note :- This will compile in Turbo C 3 Only and the zip contains the executable Version also for you to see. #include <iostream.h> #include <conio.h> #include <stdlib.h> ...
How to make your program to be fast. 1. Use Pre Increment or Pre Decrement in place of Post Increment or Post Decrement operator. i.e. use ++i or --i in place of i++ or i--. Because ++i operator take increment and save it i.e. One CPU Instruction is required for it. and in case of i++...
Program to find max(x,y) or Min(x,y) without using any relational and logical operator. int maximum(int x, int y) { int fNum,temp,num; num = x; num = y; temp=fNum; return( temp);
Difference between arrays and pointers? What is the purpose of realloc( )? What is static memory allocation and dynamic memory allocation? How are pointer variables initialized? Are pointers integers?
Introduction A lot of us use TC in our colleges. Today I will share with you Two ways to have fun in lab with your teachers. ;) Background Trick I In the first way, you will create an error in any wokring code just by adding one or more numeric letter in it. There will be only one...
Typecasting is simply a mechanism by which we can change the data type of a variable, no matter how it was originally defined. When a variable is typecasted into a different type, the compiler basically treats the variable as of the new data type. Example Lets go for a very simple example : ...
Introduction In computer science a search algorithm is a technique of finding a particular item among a collection of items. Searching for data is the second most common activity (after sorting data) necessary for creating many types of programs. Sequential Search In this technique we...
Introduction In computer Science and mathematics sorting is any technique that puts elements of a list in a certain numerical or lexicographical order.We will discuss some of the commonly used sorting algorithms which has been implemented in various high level languages like C, C++,...
The other day I was working on a code where in I was doing some file related operations. I used the function feof() to test whether the end of file has been reached or not. I got into some trouble over the way I used this function in my code, after debugging a bit I found the problem. The problem...
Continuing my previous article Understanding File Handling Functions in C, here in this article let us focus on functions like : fread() // read a chunk of data from file fwrite() // Write a chunk of data to file feof() // Check for end of file indicator ferror() // Check for error...