C Programming Tutorials

C Programming Tutorials And Articles
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One of the tricky question in interview comes out is How do you point to the third byte of an integer. Assumption that integer is 4 byte. Here is the code to do the same #include <iostream> using namespace std; int main(int argc, char *argv) { int i = 35; //integer...
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C implementation of double linked list #include <stdio.h> #include <conio.h> #include <stdlib.h> #include <string.h> #define N 100 struct dlinklist {
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I wrote a program in C for matching patterns among 2D matrices. In brief, the program accepts a SUBSET matrix & a SUPERSET matrix as I/P from user and helps verify whether the SUBSET matrix is present within the SUPERSET matrix in a continuous manner (provisions have been made for detecting row...
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Introduction A command line argument is a parameter which is passed to a program at the time or instant when it is invoked or executed from the command line .This is accomplished by passing information to main() method of the program. It is the information that directly follows the program’s...
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The article explains why hashing have o(1) complexity. This article will clear your doubt that whay hashing has 0(1) time complexity but will not take you deeper . There are certain factors which can affect the time complexity like collision and performance of hashing depends on hashing algorithm....
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What is Dameon Process? A Daemon process is a process which is not associated with any terminal and hence is supposed to run in background. Since, a daemon process involves background processing, it is recommended it should not include any user interaction. Therefore, it should be clear about...
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Using URLDownloadToFile function In this article I would want to show you how to download a file from internet using URLDownloadToFile function in C language. I think everybody has ever experienced the downloading a file with Internet Explorer. IE is using directly this function, but It uses...
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When an ELF executable is executed, a process is created and its process image is create in the RAM. However, it is here in the process image in RAM, all the variables are assigned memory. Sometimes memory is allocated statically i.e. defined how much memory at the compile time, and at times it has...
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Relocating a node in the linked list is one of major operation and I have tried to simulate one type of movement. i.e. moving forward. node* MoveForward(node *current) { int rno; /* Roll number for moving of node */ int n; /* Number of nodes...
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Hello every member of go4expert forum. I have something to share with you all. I have successfully developed a date program which prompt a user to enter a date(12/12/2005) and return the day of week(tuesday). #ifndef CONVERTER_H_ #define CONVERTER_H_ struct U_Days { int days; }u_days; ...
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Program tells you the day of the date inputed. Remember when you copy the code paste in a file named *.c and not cpp file as that will cause an error. I have commented in the code where it will cause the error. #include<stdio.h> #include<conio.h> #include<time.h> #define AND && #define OR...
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This is the third article where I will tell you about a couple of new programming methods that can help you make your code simpler and safer. You may read the previous two posts here and here . This time we will take samples from the Qt project. Introduction It was not accidentally that I...
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The motivation behind writing this article came from the fact that there are still many books/tutorials/softwares etc where I have seen 'void main' being used instead of 'int main'. Still most of the C/C++ newbies are taught to start practice coding with 'void main'. Even I started practicing C in...
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Before we start with Non re-entrant Functions, Can you guess the problem with this piece of code : #include<stdio.h> #include<signal.h> #include<unistd.h> #include<stdlib.h> int flag; char *s;
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Suppose a system call was blocked due to some reason (like waiting for a read of some data on terminal) and during this time a signal occurs. Do you know what happens in this scenario? In this article we will discuss the impact of signals on system calls. System calls are different from...
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We will discuss the concept of Macros. A Macro is a name given to a piece of code or to a value. Whenever the macro is used in the code, it is replaced by its value at the very first stage (preprocessing stage) of compilation process. They are defined using '#define' directive. For...
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A lot many times you would have used a Linux command with some arguments to it. Like : cp -r /home/user/Desktop/abc /home/abcrm -rf abcIn the above examples, 'cp' or 'rm' are the name of binaries (written in 'C') while the rest of the stuff is the command line arguments to the respective...
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What is OpenGL? OpenGL is a set of standard API's for developing 2D and 3D graphics applications. The standard provides it in the form of a library which can be linked along wih your program (could be C/C++). OpenGL includes vast scope of API's which can be used to render figures, textures,...
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This article is the Part-II (Part-I here) of the series where in we are focusing on good coding practices. In the Part-I we discussed the importance of the assert macro/function for detecting and debugging bugs in program. In this part we will focus on good coding practices while dealing with...
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In this tutorial we’ll be learning about LOGICAL operators in C , What are they and How they can be used. These are also a fundamental part of C programming Language, and You’ll find them in almost every useful code using conditions. Note : C Generally denotes 1 for True and 0 for False. (While...
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