Program to find the day of the week for a given date
1.0 Day of Week The Gregorian calendar was adopted in 1582. The formula to find the day of the week for any date after 1582 is, d = N +…
C Programming Tutorial 5: Structures and Unions
1.0 Structures A structure, in the C programming language, is a collection of variables for an entity. The variables are known as members of the structure and are located at…
C Programming Tutorial 4: Pointers and Arrays
1.0 Introduction A pointer variable holds the address of another variable. It is said to be "pointing" to that variable. For example, int *ip; defines a variable ip of type…
C Programming Tutorial 3: Control Flow and Functions
1.0 Introduction A C program comprises of global data and functions. A program must have a main function and the execution starts at the first statement in the main function.…
C Programming Tutorial 2: Data Types and Expressions
1.0 Introduction Data is an important part of a program. In fact, programs are written so that data can be captured, processed, stored and presented to the user. The success…
C Programming Tutorial 1 – Getting Started
1.0 Introduction C is a procedural programming language invented by Dennis Ritchie in 1972. C is, possibly, the most widely used programming language in the last fifty years. There are…
How to trim a string in C
The problem of removing leading and trailing whitespace characters in strings occurs in programming quite often. Here is a solution. #include <stdio.h> #include <stdlib.h> #include <string.h> #include <ctype.h> void trim…
Queue implementation in C using linked list
1.0 Queue A queue is something we see often in our daily lives. People stand in a queue to get into a bus, to get food in a buffet, buy…
Gtk-WARNING **: cannot open display:
While running a GTK+ based C program under Cygwin, the following runtime error is observed, Gtk-WARNING **: cannot open display: SOLUTION Make sure that Cygwin/XServer is installed and is running.…
cygwin1.dll not found
A C program was compiled under Cygwin and run directly under Windows. The following runtime error was observed, cygwin1.dll not found SOLUTION Make sure that the environment variable, PATH, has…