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C Programming Files I/O

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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 ...
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C Program to Display Prime Numbers Between Two Intervals #33

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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 ; } ...
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C Data Types

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C Programming Data Types In this tutorial, you will learn about data types and how to declare a variable in C programming. In C programming, variables or memory locations should be declared before it can be used. Similarly, a function also needs to be declared before use. Data types simply refers to the type and size of data associated with  variables  and functions. Data types in C Fundamental Data Types Integer types Floating type Character type Derived Data Types Arrays Pointers Structures Enumeration This tutorial will focus on fundamental data types. To learn about derived data types, visit the corresponding tutorial. int - Integer data types Integers are whole numbers that can have both positive and negative values but no decimal values. Example: 0, -5, 10 In C programming, keyword  int  is used for declaring integer variable. For example: int id; Here,  id  is a variable of type integer. You can de...
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Learn C Programming The Definitive Guide C is a powerful general-purpose programming language. It is fast, portable and available in all platforms. If you are new to programming, C is a good choice to start your programming journey. This is a comprehensive guide on how to get started in C programming language, why you should learn it and how you can learn it. TABLE OF CONTENTS ·         C Tutorials ·         What is C Programming? ·         Reasons to Learn C ·         Your First C Program ·         Recommended Books ·         Things to Remember What is C (Programming Language)? - The Basics Before getting started with C programming, lets get familiarized with the language first. C is a general-purpose programming language used for wide rang...
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Keywords and Identifiers

C Programming Keywords and Identifiers In this tutorial, you will learn about keywords; reserved words in C programming that are part of the syntax. Also, you will learn about identifiers and proper way to name a variable. Character set Character set is a set of alphabets, letters and some special characters that are valid in C language. Alphabets Uppercase: A B C ................................... X Y Z Lowercase: a b c ...................................... x y z C accepts both lowercase and uppercase alphabets as variables and functions. Digits 0 1 2 3 4 5 6 7 8 9 Special Characters Special Characters in C Programming , < > . _ ( ) ; $ : % [ ] # ? ' & { } " ^ ! * / | - \ ~ + White space Characters blank space, new line, horizontal tab, carriage return and form feed C Keywords Keywords are predefined, reserved words used in programming that have special meanings to the compiler. Keywords are part of the syntax and they ca...
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C – Programming Basics

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If you are looking for C programs, please click here  “C programs” .  This C programming basics section explains a simple “Hello World” C program. Also, it covers below basic topics as well, which are to be known by any C programmer before writing a C program. C programming basic commands to write a C program A simple C program with output and explanation Steps to write C programs and get the output Creation, Compilation, and Execution of a C program * How to install C compiler and IDE tool to run C programming codes The basic structure of a C program * Example C program to compare all the sections * Description for each section of the C program C programs ( Click here for more C programs )  with definition and output – C program for a Prime number, Factorial, Fibonacci series, Palindrome, Swapping 2 numbers with and without temp variable, sample calculator program and sample bank application program etc. 1. C PROGRAMMING BASIC...
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