5.1.4. Using Arrays in Programs:, Chapter - 5, Arrays and String, HSSC-II (12th Class) Computer Science Key Point Notes

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

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Unit 5: Arrays and String

5.1.4. Using Arrays in Programs:

To perform any operation on the arrays like entering data, printing the data values, searching for the data, comparing the data, sorting the data, etc. a loop should be used. 

For example to fill an array using the cin function:

        int myArray[6];
        for(int i=0; i<=5; i++)
        {
                cout<<“Please enter the value: “;
                cin>>myArray[i];
        }

To print the data values from an array:

        for (int i=0; i<=5; i++)
        {
                cout<<myArray[i]<<endl;;
        }

Example # 1

Write a program that reads 5 integer values in an array and finds their total and average.

#include<iostream.h>
#include<conio.h>
void main()
{
        clrscr();
        int a[5], sum = 0;
        float avg;
        for(int i=0; i<=4; i++)
        {
                cout<<“Enter a number: “;
                cin>>a[i];
        }
        for(int j=0; j<=4; j++)
        sum = sum + a[j];
        avg = sum/5;
                cout<<“\n Sum of all numbers is: “<<sum;
                cout<<“\n Average = “<<avg;
        getch();
}

Example # 2:

Write a program that reads ten integer data values and prints the largest data values?

#include<iostream.h>
#include<conio.h>
void main()
{
        clrscr();
        int arr[10], max;
        for(int i=0; i<=9; i++)
        {
                cout<<“Enter a number: “;
                cin>>arr[i];
        }
        max = arr[0];
        for(int j=0; j<=9; j++)
        {
        if(max < a[j])
        max = a[j];
        }
                cout<<“The largest value is: “<<max;
        getch();
        }

Exercise Problem:

Problem ii:
Write a program that reads ten numbers in any array and prints them in reverse.

Problem iii:
Write a program that reads ten numbers and prints the smallest along with its index?

Problem iv:
For the given array:

int a[15]={4,8,5,1,3,5,0,12,5,7,3,15,8,4,11}

Write a program that prints the number of times the number 5 appears in the array.

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5.1. Introduction to Arrays:

5.1.1 Comcept of an Array:

5.1.2. Declaring (defining) an Array

5.1.3. Initialization of Array

5.1.4. Using Arrays in Programs:

5.1.5. The Sizeof() Function

5.2.1. Introduction of Two-Dimensional Arrays

5.2.2. Defining and Initializing a Two-Dimensional Array:

5.2.3. Accessing and Filling a 2D array

5.3.1 Introduction to Strings

5.3.2 Defining (declaration) a String

5.3.2 Initializing a String

5.4 Commonly used String Function

Chapter 5 (Complete Key Point Notes)

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