C Programming Tutorials

C Programming Tutorials And Articles
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Today while solving a problem, I had to convert integers to string in C to use its indexing capabilities. One simple solution was to use sprintf, which can be done in 2-3 lines, but i was temped to solve this problem without any string manipulation functions. The Code // Change a positive...
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Introduction This article talks about different ways of handling Abnormal Condtions or Errors that occur or Invalid Data receiving by an Application. These Errors are something, the programmer expect to occur in their Applications. Depending on the specific circumstances, below are some...
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In a language like 'C', the programmer has almost complete control over memory operations but this brings in a problem that many of you might have faced : Memory errors. Although GDB can be used in many areas of these kind of problems but there are sometimes when programmer doesn't want to put too...
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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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Most of the people working on Linux must have used the basic command 'ls'. I use it many times a day. It is a very useful command when it comes to displaying the contents of a directory and their properties. For those few who have still not used 'ls' its high time now, go to its man page, study it...
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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++...
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Function pointers are pointers that can hold the address of a particular type of functions. These pointers, once initialized can be used to call the function whose address they are pointing to. Declaring Function Pointer A function pointer can be declared in following way : <return type of...
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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...
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Most of the newbie programmers are fascinated by the term 'hacking' or 'cracking'(to be precise). Generally, they see some weirdly written code (that may visually seem like a painting to any new programmer) and start dreaming of the developer who has written the code as god of programming or...
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Networking is all about transmitting messages from one node to another. The simplest example can be to transmit "Hello World" from one computer to another. Socket programming in C/C++ has already been covered. Today we will see how to check if the transmitted data has any errors. There are many...
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I am attaching a ZIP file that contains a Quiz Making and Participating program. You MUST donwload the ZIP and run the exe. The source code given below would not be sufficient enough. As of Right now, only the participating side is completed - Files are created for individual teams and all their...
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The thing is that it wonít be really OOP because the encapsulation will be a bit weak and you will have to handle constructors and destructors manually but itís still cool. First of all, basic knowledge: 1) Structures 2) Pointers to Functions 1: Structures A structure is a collection...
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For a given problem, there maybe many solutions, but we always look for a ‘better’ solution. So, how do we determine which solution is ‘better’? In the context of algorithms and programs, we consider a solution as ‘better’ when it uses the minimum resources. Hence, an efficient program will always...
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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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Introduction Here I am going to give a simple example of addition, substraction, multiplication etc to check overflow/underflow so that we can minimize buggs/defects in our code The code In your project/product or any place, If you have some operation like Addition, substraction...
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What is C ? C Programming Language was developed at AT & T’s Bell Labs in 1972. It was designed and developed by Denis Ritchie. Spite of C being an old language it still has remained one of the worlds most popular and one of the best programming language even came into existence! C is...
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Stack is a Last in First out(LIFO) abstract data structure...Stack is used as the main data structure for processing and data management on most of the OS architectures...like intel x86 etc etc.. Stack based Overflows It happens when to much data is passed on the call stack and results in...
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After writing my previous article Virus Code in Linux - C Code That Changes it's Process Name Run Time, I wondered if a process can change its name then why cannot it change its PID. And what if a process can change both its name and PID after lets say every 1 second? Well it will be a difficult...
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A running instance of a program executable is known as a Process. A process when run can do various things like open some files, read/write some data, create some threads/processes, register some functions as callback in various scenarios etc. According to the logic, after the completion of the...
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Loops are the basic logic building structures in computer programming. It is a way of executing statement(s) repeatedly in specified times, which is termed as iteration. Here different types of loops in C language will be discussed. All of them have same goal, but their way of working is...
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