Header files & Operators in C++

 // There are two types of header files:

// 1. System header file: It comes with the compiler

#include<iostream>

// 2. User defined header file: It is written by the programmer

// #include"this.h"    This will produce an error if this.h is not present in the current directory

using namespace std;

int main()

{

    int a=4,b=5;

    cout<<"Operators in C++ : "<<endl;

    cout<<"Following are the types of operators in C++"<<endl;

    //Arithmetic Operators

    cout<<"The value of a + b is : "<<a+b<<endl;

    cout<<"The value of a - b is : "<<a-b<<endl;

    cout<<"The value of a * b is : "<<a*b<<endl;

    cout<<"The value of a / b is : "<<a/b<<endl;

    cout<<"The value of a % b is : "<<a%b<<endl;

    cout<<"The value of a++ is : "<<a++<<endl;

    cout<<"The value of a-- is : "<<a--<<endl;

    cout<<"The value of ++a is : "<<++a<<endl;

    cout<<"The value of --a is : "<<--a<<endl;

    cout<<endl;

    //Assignment operators --> used to assign values to variables

    // int a=3,b=9;

    // char d='d';

    //Comparison operators

    cout<<"Following are the comparison operators in C++"<<endl;

    cout<<"The value of a==b is : "<<(a==b)<<endl;

    cout<<"The value of a!=b is : "<<(a!=b)<<endl;

    cout<<"The value of a > b is : "<<(a > b)<<endl;

    cout<<"The value of a < b is : "<<(a < b)<<endl;

    cout<<"The value of a >= b is : "<<(a >= b)<<endl;

    cout<<"The value of a <= b is : "<<(a <= b)<<endl;

    cout<<endl;

    //Logical operators

    cout<<"Following are the logical operators in C++"<<endl;

    cout<<"The value of this logical AND operator ((a==b) && (a<b)) is : "<<((a==b) && (a<b))<<endl;

    cout<<"The value of this logical OR operator ((a==b) || (a<b)) is : "<<((a==b) || (a<b))<<endl;

    cout<<"The value of this logical NOT operator (!(a==b)) is : "<<(!(a==b))<<endl;

    return 0;

}

OUTPUT:

> cd "d:\C++\" ; if ($?) { g++ tut6.cpp -o tut6 } ; if ($?) { .\tut6 } Operators in C++ : Following are the types of operators in C++ The value of a + b is : 9 The value of a - b is : -1 The value of a * b is : 20 The value of a / b is : 0 The value of a % b is : 4 The value of a++ is : 4 The value of a-- is : 5 The value of ++a is : 5 The value of --a is : 4 Following are the comparison operators in C++ The value of a==b is : 0 The value of a!=b is : 1 The value of a > b is : 0 The value of a < b is : 1 The value of a >= b is : 0 The value of a <= b is : 1 Following are the logical operators in C++ The value of this logical AND operator ((a==b) && (a<b)) is : 0 The value of this logical OR operator ((a==b) || (a<b)) is : 1 The value of this logical NOT operator (!(a==b)) is : 1 PS D:\C++>