Header Files and Operators in C++

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

#include<iostream>

using namespace std;

//  There are two types of header files :

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

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

//  #include "this.h" --> This will produce an error if this.h is not present

// in the current directory.

int main()

{

    int a = 4, b = 5, c = 123, d = 40;

    cout<<"Hello World\n";

    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<<"\n";

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

    cout<<"The value of a * b is "<<a*b<<"\n";

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

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

    cout<<"The value of c % d is "<<c%d<<endl;

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

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

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

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

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

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

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

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

    cout<<endl;

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

    int e = 3, f = 5;

    char i = 'r';

    //  Comparison Operators

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

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

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

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

    return 0;

}

//OUTPUT:

// Hello World

// 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 c % d is 3

// The value of a++ is 4

// The value of b++ is 5

// The value of a-- is 5

// The value of b-- is 6

// The value of ++a is 5

// The value of ++b is 6

// The value of --a is 4

// The value of --b is 5

// Following are the comparison Operatos 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 Operatos in C++

// The value of ((a==b) && (a<b)) logical AND operator is 0

// The value of ((a==b) || (a<b)) logical OR operator is 1

// The value of (!(a==b)) logical NOT operator is 1