This document provides an introduction to programming with C++, including the basic structure of a C++ program, how to open C++, and examples of variable types and programs to calculate the area of a square and sum of two numbers. The main parts of a C++ program include using #include to import headers, defining the main function, and writing code within the main block. Variables can be integer, decimal, character, or boolean types. Example programs show how to declare and assign variables, use input/output streams, and perform calculations.

1. LAB 2
Programming with C++

2. Main part in C++ program
#include<iostream.h>
void main()
{
Any code will be written here
}

3. How to open C++
START

19. Variables
• Integer (int).
• Decimal (float,double).
• Character (char).
• Boolean (true / false).

20. Example1
Pseudocode C++
1. Read length. • int length,area;
2. area = length*length. cin>>length;
3. Print area. • area = length*length;
• cout<<“area=“<<area;

21. Example2
• Write a program to calculate the summation
of two numbers.