Posts

Showing posts from November 12, 2019

Symbolic constant

By -
Defining Symbolic constant: A symbolic constant value can be defined as a preprocessor statement that is used in the program as any other constant value. When you include the header file with the help of the keyword define, the constant is declared it is called symbolic constant. Define symbolic constant : #define symbolic_name value of constant The symbolic name of variable or constant then after giving space put the value which wants to put. Other examples : #define PI 3.141593 #define TOTAL 100 You can also use this in as a global variable PI-Symbolic constant whose value is 3.141593. When the program is preprocessed, all occurrences of the symbolic constant PI are replaced with the replacement text 3.141593 Symbolic constant in C program : #define PI 3.141593 #define TRUE 1 #define FALSE 0 Symbolic constants are the constants represented by symbols... Constants are values that don't change throughout the program execution Example: #include<stdio...
Post a Comment
Read more

Popular posts from this blog

Getting input in C

By -
                 Getting input in C There are two ways to get input from user in C language. 1) By scanf() function 2) By gets() or fgets() function 1. By scanf() function:-            The standard input-output header file named stdio.h   contains the definition of the function printf()   and scanf(), which are used to display on the screen and to take input from user. Program:-   #include < stdio . h > void main ( ) { // defining a variable int x ; /* displaying message on the screen asking the user to input a value */ printf ( "Please enter a value..." ) ; /* reading the value entered by the user */ scanf ( "%d" , &x ) ; /* displaying the number as output */ printf ( "\nYou entered: %d" , x ) ; } Output:- Please enter a value... The Output was aski...
Read more

Unary Operator

By -
What is a Unary Operator? Unary Operators are the operators which require only one operand. While binary operator requires two operands and tertiary requires three operands. Unary operators are: +, -, ++, --, sizeof() 1) + and -   Note: (+) and (-) are not of addition and subtraction but it denotes only sign of operator as positive or negative. Ex. +1, +2, +3... -1, -2, -3... 2) ++ and -- It seems to be  ++ (two plus-plus), But it is a single operator. It is called the increment operator . Increment operator are of two type: i) Pre increment ii) Post increment The meaning of both the increments is the same. i.e To add +1 in  any value x++ or ++x; or to increase the value by 1. x++ is x=x+1 where x is a variable. Example: 7++ output is 8 25++ output is 26 program: (Pre-increment)  #include <stdio.h> #include <conio.h> int main() {     int x=7;     ++x;  / /Whe...
Read more