3.3.6 The Programing with I/O Handling Function, Chapter - 3, Object Oriented Programming in C++, HSSC-II (12th Class) Computer Science Key Point Notes

12th Class (HSSC-II) Computer SLO Based Key Point Notes

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Unit 3: Object-Oriented Programming in C++

3.3.6 The Programing with I/O Handling Function

Program 1: The following program reads three integers and prints their sum and product. 

#include <iostream.h>
#include <conio.h>
void main()
{
        int x,y,z,sum.prod;
        cout<<“\nEnter first number: “;
        cin>>x;
        cout<<“\nEnter second number: “;
        cin>>y;

        cout<<“\nEnter third number: “;
        cin>>z;

        sum=x+y+z;
        prod=x*y*z;
        cout<<“\nSum="<<sum;

        cout<<“\nProduct="<<Prod;
        getch();

}

The execution of the program is shown below.
Enter first number:3
Enter second number:4
Enter third number:5
Sum=12
Product=60

Note: When this program is executed, it prompts the user to enter three numbers. The user enters the numbers, 3,4, and 5 separated by space, and presses the Enter key. The program calculates the sum and product and displays on the screen.

Program 2: The following program reads the base and height of a triangle and prints the area using floating-point values.

#include <iostream.h>
#include <conio.h>
void main()
{
        float base,height,area;
        cout<<“\nEnter the base: “;
        cin>>base;
        cout<<“\nEnter the height: “;
        cin>>height;

        area=(base*height)/2;

        cout<<“\nThe area of triangle is "<<area;
        getch();

}

In this program, two separate input statements are used for reading the values for the variable and height. the execution of the program is shown below"

Enter the base:4.5;

Enter the height:6.2;

The area of the triangle is 13.95

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3.1 Introduction to Object-Oriented Programming (OOP):

3.1.1 Computer Program/Software:

3.1.2 Header File and Reserved Words

3.1.3 Structure of C++ Program

3.1.4 C++ program statement Terminator:

3.1.5 Comment statement in C++ Program:

3.2.1 C++ Constants and Variables

3.2.2 Rules for Naming a Variable:

3.2.3 Different C++ data types for variable

3.2.4 The Constant Qualifier (const)

3.2.5 Variable Declaration and Initialization

3.2.6 Type Casting

3.3: Input / Output Handling

3.3.1 The cout Statement

3.3.2 The cin Statement:

3.3.3 The getch() function:

3.3.4 Commonly Used Escape Sequences

3.3.5 Commonly Used Escape Sequences

3.3.6 The Programing with I/O Handling Function

3.3.7 The Manipulators endl and setw

3.4.1 Types of Operator in C++:

3.4.2 UNARY, BINARY AND TERNARY OPERATORS

3.4.3 Order of Precedence of Operator

3.4.4 Expression in C++

4.1.4. The Switch Statement:

Chapter 3 (Complete Key Point Notes)

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