C Exercises: Create a new array after replacing all the values 5 with 0 shifting all zeros to right direction

Last update on July 28 2025 12:49:49 (UTC/GMT +8 hours)

72. Replace 5 with 0 and Shift Zeros Right

Write a C program to create an array after replacing all the values 5 with 0 and shifting all zeros to the right.

C Code:

#include <stdio.h>
#include <stdlib.h>

// Function prototype for 'print_array'
void print_array(int parray[], int size);

int main(void){ 
    int arr_size;

    // Declaration and initialization of an integer array 'a1'
    int a1[] = {1, 2, 0, 3, 5, 7, 0, 9, 11, 5};
    arr_size = sizeof(a1)/sizeof(a1[0]);

    // Printing the elements of the original array 'a1'
    printf("Elements in original array are: ");  
    print_array(a1, arr_size);    

    // Declaration of 'size' and 'index' variables
    int size = arr_size, index = 0;

    // Declaration of integer array 'result'
    int result[size];

    // Loop to iterate through the elements of 'a1'
    for (int i = 0; i < size; i++)
    {
        // If the current element is not equal to 5, copy it to 'result' and increment 'index'
        if (a1[i] != 5)
        {
            result[index++] = a1[i];
        }
    }

    // Update 'arr_size' to reflect the size of the modified 'result' array
    arr_size = sizeof(result)/sizeof(result[0]);                

    // Printing the elements of the modified array 'result'
    printf("\nElements in new array are: ");  
    print_array(result, arr_size);
}       

// Definition of the 'print_array' function
void print_array(int parray[], int size)
{
    int i;      
    // Loop to print the elements of the array
    for( i = 0; i < size - 1; i++)  
    {  
        printf("%d, ", parray[i]);  
    } 
    // Printing the last element
    printf("%d ", parray[i]);  
    printf("\n");   
}

Sample Output:

Elements in original array are: 1, 2, 0, 3, 5, 7, 0, 9, 11, 5 

Elements in new array are: 1, 2, 0, 3, 7, 0, 9, 11, 0, 0

Pictorial Presentation:

Flowchart:

For more Practice: Solve these Related Problems:

• Write a C program to replace all occurrences of 7 with 0 and shift zeros to the left.
• Write a C program to change all negative numbers in an array to 0 and move zeros to the end.
• Write a C program to replace a specified value with 0 in an array and then rotate the array so zeros are grouped together.
• Write a C program to replace multiple specified values with 0 and then shift all zeros to one side.

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