c++

1. Programming Fundamentals
Lab No. 1
Introduction to C++ Basics

4. Structure of C++ Programs
A C++ program consists of three main parts.
• Preprocessor Directives
• The main Function
• C++ Statements

5. Preprocessor Directives
#include<iostream>
#include<conio.h> // .h shows that it’s a header file
Using namespace std;

6. Main Function
Int main()
{
}

7. C++ Statements
• Cout<<“programming is fun”;
• Cin>>name;
• Cout<<“Your name is <<name;

9. Sample Program
#include<iostream>
#include<conio.h>
Using namespace std;
Int main()
{
Cout<<“This is my first program”;
getch(); // if getch() is not used then display window will exit without
//waiting for a character to be pressed from the keyboard.
}

10. Predefined Identifiers
• Cout
Syntax:
Cout<<“……..”;
• Cin
Syntax
Cin>>…..;

11. Lets practice!

12. Initialization & Declaration
• Int x=4;
• int y=2;
• Int z=40;
• Int z; //declaration
• z=40; //initialization
• Int x=4, y=2, z=40;

13. Sample Program
To find the sum of two numbers
#include<iostream>
#include<conio.h> // .h extension is used to show that it’s a header file
Using namespace std;
Int main()
{
Int x=5;
Int y=3; //can also be written as int x=5, y=3;
Int z;
z=x+y; // No need to write ‘int’ with z again!!
Cout<<“z”<<endl;
Cout<<z; //Note that commas (“ “) are not used here. Make sure you know what difference it will make!
_getch();
}

14. Practice programs to get used to with C++ environment!