C Programming Tutorials

C Programming Tutorials And Articles
  Title / Author Replies Reverse Sort Order
Views
When a process terminates abnormally it usually tries to send a signal indicating what went wrong. C programs (and UNIX) can trap these for diagnostics. Also user specified communication can take place in this way. Signals are software generated interrupts that are sent to a process when a...
2
28,292
File Splitter is a very useful utility application for downloading . User want to download and store the downloaded files into Floppy disk , Its possible only if the downloaded file size is Less than or equal to 1.38 MB , If file size is more than the floppy disk size then File Splitter is...
2
12,096
Insert a node before a particular node in a linked ist node* ins_bef(node *current) { int rno; /* Roll number for inserting a node*/ node *newnode,*temp; newnode=(node*)malloc(sizeof(node)); printf("\nEnter the roll number before which you want to insert a...
2
82,984
Introduction I always like smilies and the ASCII characters can behave like good smileys and so I wrote a small utility to get all tha ASCII values of the characters and I can easily add them anywhere I prefer The Code int i; FILE *fp; fp = fopen("c:\\code.txt","w"); for(i=0;i<256;i++)
2
3,588
Introduction The idea is simple just to test whether the expression contains correct sequence of brackets or not. void main() { char arr; char *top; int loop=0,i,l,binary;
2
1,903
The code to find upper and lower diagonal of 3x3 matrices #include<conio.h> #include<stdio.h> void main() { int a,i,j,k; clrscr(); printf("\n Enter a Matrix 3x3:\n\n");
2
4,361
One of my friends, who is learning to program in C, asked me about how to write a program which checks an inputed string is a palindrome or not, without using the header file string.h So here's the solution. #include <stdio.h> void main(void) { char str; int len=0,i=0,j,flag=1;
2
31,448
In computer programming, a bitwise operation operates on one or two bit patterns or binary numerals at the level of their individual bits. On many computers, bitwise operations are slightly faster than addition and subtraction operations and significantly faster than multiplication and division...
2
15,978
Introduction This article explains what downcast are, how to make it safe, and so forth. However, before learning what downcast are, you must be familiar with polymorphism. Background Can you guess what is down-casting…yes it’s an opposite mechanism of up-casting. In upcast the...
2
16,753
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...
2
10,489
Generally a question is asked that if you have given n bits then print out all the possible binary numbers of n bit and so I will try to explain how to get that done. Please don't Copy Paste. Understand The logic because it is useful in other problems as well for eg if n=1 then you can have 0...
2
9,381
This is the second article on avoiding certain errors at the early stage of code writing. In the previous post, we have already advised you to avoid a large number of calculations in one expression. However, we should investigate this question in detail. Let's see what's dangerous about complex...
2
4,314
There are certain situations where you may want to limit your process's use of system resources like CPU or may want to put certain limitations on things like number of open file descriptors, maximum memory your process can allocate for its data etc. You may use commands like ulimit, sysconf etc to...
2
10,987
What is a Compiler A Compiler is a Computer Program that go through the provided source code , Checks for error and converts in into another computer language that a computer can understand (usually binary opcodes). Compilation A compiler's work can be divided into 3 parts. Front End...
2
4,349
The while loop is a statement used in some programming languages (including C) to execute code repeatedly, this allows a programmer to execute a set of instruction multiple times until a condition is met. It is one of the simplest looping structure in C and basically follows the following...
2
1,490
Do while loops Do while loops are special kind of loops that are used to execute statements repeatedly in some programming languages including C. The do while loop is quite similar to the while loop but the main special thing about Do While loops are that they evaluate conditions at the bottom...
2
3,506
Switch Case Statements are special type of Conditional Statements (Selection Control Mechanism) , Basically they are used as a alternative for the long if statements used to compare integral values , By integral values we mean the values that can be expressed as an integer eg :- Characters ,...
2
7,342
Code for Integer Into Words #include<stdio.h> void main() { long int n,t; char a={" ","One","Two","Three","Four","Five","Six","Seven","Eight","Nine","Ten"}; char b={" "," ","Twenty","Thirty","Forty","Fifty","Sixty","Seventy","Eighty","Ninety"}; char c={"...
1
2,807
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) {...
1
4,388
We will understand a very important function 'fstat()'. We will create a working code to describe the capabilities of fstat() but before that lets theoretically Understand what it does. fstat() as the name suggests is used to get the status of the file. By status we mean all the useful...
1
13,791