Constants, Manipulators and Operator Precedence in C++

 #include<iostream>

#include<iomanip>

using namespace std;

int main()

{

    // int a = 34;

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

    // a = 42;

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

    // cout<<endl;

    //  Constants in C++

    // const int b = 22;   //Since const, We can't change the value of b here

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

    // b = 78;  //You will get an Error because b is constant

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

    // Manipulators in C++

    int a = 3, b = 78, c = 2387;

    cout<<"The value of a without setw is : "<<a<<endl;

    cout<<"The value of b without setw is : "<<b<<endl;

    cout<<"The value of c without setw is : "<<c<<endl;

    cout<<"The value of a is : "<<setw(4)<<a<<endl;

    cout<<"The value of b is : "<<setw(4)<<b<<endl;

    cout<<"The value of c is : "<<setw(4)<<c<<endl;

    cout<<endl;

    //  Operator Precedence

    int x = 3, y = 4;

    // int z = (x*5) + y;

    int z = ((((x*5) + y) - 45) + 87);

    cout<<z<<endl;

    return 0;

}

//  OUTPUT:

//The value of a without setw is : 3

// The value of b without setw is : 78

// The value of c without setw is : 2387

// The value of a is :    3

// The value of b is :   78

// The value of c is : 2387

// 61