C Replace all Even elements by 0 and Odd by 1

Write a C Program to replace all Even elements by 0 and Odd by 1. Here’s simple Program to replace all Even elements by 0 and Odd by 1 in C Programming Language.

What is an Array ?

Arrays a kind of data structure that can store a fixed-size sequential collection of elements of the same type. An array is used to store a collection of data, but it is often more useful to think of an array as a collection of variables of the same type.

Instead of declaring individual variables, such as number0, number1, …, and number99, you declare one array variable such as numbers and use numbers[0], numbers[1], and …, numbers[99] to represent individual variables. A specific element in an array is accessed by an index.

All arrays consist of contiguous memory locations. The lowest address corresponds to the first element and the highest address to the last element.

Here is source code of the C Program to replace all Even elements by 0 and Odd by 1. The C program is successfully compiled and run(on Codeblocks) on a Windows system. The program output is also shown in below.

SOURCE CODE : :

/* C Program to replace all Even elements by 0 and Odd by 1  */

#include <stdio.h>

void readArray(int arr[], int size)
{
    int i =0;

    printf("Enter elements of array :: \n");

    for(i=0; i < size; i++)
    {
        printf("\nEnter arr[%d] :: ",i);
        scanf("%d",&arr[i]);
    }
}

void printArray(int arr[], int size)
{
    int i =0;

    printf("\nElements are : ");

    for(i=0; i < size; i++)
    {
        printf("\narr[%d] : %d",i,arr[i]);
    }
    printf("\n");
}

void replaceEvenOdd(int arr[], int size)
{
    int i=0;

    for(i=0; i < size; i++)
    {
        if( arr[i] % 2 == 0 )
            arr[i] = 0 ;
        else
            arr[i] = 1 ;
    }
}

int main()
{
    int arr[10];

    readArray(arr,10);

    printf("\nBefore replacement : ");
    printArray(arr,10);

    replaceEvenOdd(arr,10);

    printf("\nAfter replacement : ");
    printArray(arr,10);

    return 0;
}

OUTPUT : :

/* C Program to replace all Even elements by 0 and Odd by 1  */

Enter elements of array ::

Enter arr[0] :: 1

Enter arr[1] :: 2

Enter arr[2] :: 3

Enter arr[3] :: 4

Enter arr[4] :: 5

Enter arr[5] :: 6

Enter arr[6] :: 7

Enter arr[7] :: 8

Enter arr[8] :: 9

Enter arr[9] :: 0

Before replacement :
Elements are :
arr[0] : 1
arr[1] : 2
arr[2] : 3
arr[3] : 4
arr[4] : 5
arr[5] : 6
arr[6] : 7
arr[7] : 8
arr[8] : 9
arr[9] : 0

After replacement :
Elements are :
arr[0] : 1
arr[1] : 0
arr[2] : 1
arr[3] : 0
arr[4] : 1
arr[5] : 0
arr[6] : 1
arr[7] : 0
arr[8] : 1
arr[9] : 0

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