Simple Array Program

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Simple Array Program

Description

Array is a collection of similar data-type elements, which are stored in consecutive memory location under common variable name.

Syntax

data-type arrayname[size of array];

Eg. int a[10];

Array many be one-dimensional or multi-dimensional.
Array data-type and size must be declared, before it is being used.
Array index starts with zero and ends with less than one the size of the array.
Size of the array should be integer.

Initialisation

Eg.
int a[4] = {12,46,32,53};
float values[] = {33.23,53.31,53.68};

In the first example we have declared and initialized 4 elements of the array, while in the second we have directly initialized the array elements with float data-type as defining the size of array is optional.

Source code

//Simple program using Array
#include <stdio.h>
#include <conio.h>
void main()
{
int A[5],i;
int B[5] = {32,43,3,58,423};
clrscr();
printf("Enter the elements to store in array:");
for(i=0;i<4;i++)
{
scanf("%d",&A[i]);
}
printf("\nEntered elements of A array are:\n");
for(i=0;i<4;i++)
{
printf("%d\n",A[i]);
}
printf("\nStored elements of B array are:\n");
for(i=0;i<4;i++)
{
printf("%d\n",B[i]);
}
getch();
}

Program working steps

First line is the comment, 2nd and 3rd lines are preprocessor directives and 4th line is the main function from where the program execution starts.
On 5th line we have declared an array int A[5] means array can store 5 elements of integer data-type.
On 6th line an integer data-type array of size 5 with elements is initialized within the curly brackets and separated by commas.
Then using for loop, user is prompted to enter array elements for array A. These elements are sequentially stored starting from A[0], A[1]... till A[4].
Now using same for loop the array elements from array A is printed, and similarly array elements from array B is printed.
getch() to wait for the user command to exit.

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Tip Box

Array elements have garbage value, until you specify values to the elements.

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