Comments

Post a Comment

Popular

C Programming Files I/O

Image
C Programming Files I/O There are a large number of functions to handle file I/O (Input Output) in C. In this tutorial, you will learn to handle standard I/O in C using fprintf(), fscanf(), fread(), fwrite(), fseek.and more. In C programming, file is a place on your physical disk where information is stored. Why files are needed? When a program is terminated, the entire data is lost. Storing in a file will preserve your data even if the program terminates. If you have to enter a large number of data, it will take a lot of time to enter them all. However, if you have a file containing all the data, you can easily access the contents of the file using few commands in C. You can easily move your data from one computer to another without any changes. Types of Files When dealing with files, there are two types of files you should know about: Text files Binary files 1. Text files Text files are the normal .txt files that you can easily create using Notepad ...
Read more

C Program to Display Prime Numbers Between Two Intervals #33

Image
C Program to Display Prime Numbers Between Two Intervals Example to print all prime numbers between two numbers (entered by the user). This problem is solved using nested for loop and if...else statement. To understand this example, you should have the knowledge of following  C programming topics: C if...else Statement C Programming for Loop C Programming break and continue Statement Example #1: Display Prime Numbers Between two Intervals #include <stdio.h> int main () { int low , high , i , flag ; printf ( "Enter two numbers(intervals): " ); scanf ( "%d %d" , & low , & high ); printf ( "Prime numbers between %d and %d are: " , low , high ); while ( low < high ) { flag = 0 ; for ( i = 2 ; i <= low / 2 ; ++ i ) { if ( low % i == 0 ) { flag = 1 ; break ; } ...
Read more

C Program to Find the Sum of Natural Numbers using Recursion #38

Image
C Program to Find the Sum of Natural Numbers using Recursion Example to find the sum of natural numbers by using a recursive function. To understand this example, you should have the knowledge of following C programming topics: C Programming User-defined functions C Programming Recursion The positive numbers 1, 2, 3... are known as natural numbers. The program below takes a positive integer from the user and calculates the sum up to the given number. You can  find the sum of natural numbers using loop  as well. However, you will learn to solve this problem using recursion here. Example: Sum of Natural Numbers Using Recursion #include <stdio.h> int addNumbers ( int n ); int main () { int num ; printf ( "Enter a positive integer: " ); scanf ( "%d" , & num ); printf ( "Sum = %d" , addNumbers ( num )); return 0 ; } int addNumbers ( int n ) { if ( n != 0 ) return n ...
Read more

C Programming Enumeration

Image
C Programming Enumeration In this article, you will learn to work with enumeration (enum). Also, you will learn where enums are commonly used in C programming. An enumeration is a user-defined data type that consists of integral constants. To define an enumeration, keyword  enum  is used. enum flag { const1, const2, ..., constN }; Here, name of the enumeration is  flag . And,  const1 ,  const2 ,....,  constN  are values of type  flag . By default,  const1  is 0,  const2   is 1 and so on. You can change default values of enum elements during declaration (if necessary). // Changing default values of enum enum suit { club = 0, diamonds = 10, hearts = 20, spades = 3, }; Enumerated Type Declaration When you create an enumerated type, only blueprint for the variable is created. Here's how you can create variables of enum type. enum boolean { false, true }; enum boolean check; ...
Read more

C Operators

Image
C Programming Operators C programming has various operators to perform tasks including arithmetic, conditional and bitwise operations. You will learn about various C operators and how to use them in this tutorial. An operator is a symbol which operates on a value or a variable. For example:  +  is an operator to perform addition. C programming has wide range of operators to perform various operations. For better understanding of operators, these operators can be classified as: Operators in C programming Arithmetic Operators Increment and Decrement Operators Assignment Operators Relational Operators Logical Operators Conditional Operators Bitwise Operators Special Operators C Arithmetic Operators An arithmetic operator performs mathematical operations such as addition, subtraction and multiplication on numerical values (constants and variables). Operator Meaning of Operator + addition or unary plus - subtraction or unary minus * multiplica...
Read more

C if...else Statement

Image
C if...else Statement In programming, decision making is used to specify the order in which statements are executed. In this tutorial, you will learn to create decision making program using if...else statements. C if statement if (testExpression) { // statements } The  if  statement evaluates the test expression inside the parenthesis. If the test expression is evaluated to true (nonzero), statements inside the body of  if  is executed. If the test expression is evaluated to false (0), statements inside the body of  if  is skipped from execution. To learn more on when test expression is evaluated to nonzero (true) and 0 (false), check out  relational  and  logical operators . Flowchart of if statement Example #1: C if statement // Program to display a number if user enters negative number // If user enters positive number, that number won't be displayed #include <stdio.h> int main () { i...
Read more

C Standard Library Functions

Image
C Standard Library Functions In this article, you'll learn about the standard library functions in C. More specifically, what are they, different library functions in C and how to use them in your program. C Standard library functions or simply C Library functions are inbuilt  functions  in C programming. The prototype and data definitions of the functions are present in their respective header files, and must be included in your program to access them. For example:  If you want to use  printf()  function, the header file  <stdio.h>  should be included. #include <stdio.h> int main () { // If you use printf() function without including the <stdio.h> // header file, this program will show an error. printf ( "Catch me if you can." ); } There is at least one function in any C program, i.e., the  main()  function (which is also a library function). This function is automatically called ...
Read more