Computer Science SLO Based Key Point Notes

👉👉👉 Computer Science 12th Class Notes (Main Page)

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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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👉👉👉 Computer Science 12th Class Notes (Main Page)

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(National Book Foundation - As Federal Textbook Board, Islamabad 
Based on National Curriculum Pakistan 2026-2027 and Onward prescribed by Federal Board of Intermediate and Secondary Education, Islamabad, and All Pakistan Boards) 

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