// pgm1 -- data, variables, expressions
// 8/31/16
#include <iostream>
using namespace std;

int main()
{
    // variable definition
    int pgmNumber=1; // initialized to 1
    cout << "This is program number " << pgmNumber << "."
            << " Have a nice day!" << endl;

    // expression: legal combination of variables, literals,
    // and operators
    cout << "Tomorrow I will write program number " << pgmNumber+1
         << "." << endl;

    cout << "pgmNumber still has the value of : " << pgmNumber << endl;
    // now we are going change the value of pgmNumber
    // assignment operator places what is on the right
    // into the variable on the left
    pgmNumber=2;
    cout << "Value of pgmNumber after assignment is: " << pgmNumber << endl;
   //  2=x; NO GOOD lvalue required

    int x;
    x = pgmNumber + 100;
    // x+2=pgmNumber+100; NO GOOD lvalue required
    return 0;
}