C Exercises: Create a new array taking the elements after the element value 5 from a given array of integers

Last update on December 20 2024 13:13:27 (UTC/GMT +8 hours)

Write a C program to create a array taking the elements after the element value 5 from a given array of integers.

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, 3, 5, 7, 9, 11};
    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' variable and calculation of the number of elements after the first 5
    int size = 0;
    int len = arr_size;
    int i = len - 1;

    // Loop to find the last occurrence of 5 in 'a1'
    while (i >= 0 && a1[i] != 5) i--;
    i++;

    // Calculate the number of elements after the last 5
    size = len - i;

    // Declaration of 'post_ele_5' array with the calculated 'size'
    int post_ele_5[size];

    // Loop to copy elements from 'a1' after the last 5 to 'post_ele_5'
    for (int j = 0; j < size; j++)
    {
        post_ele_5[j] = a1[i + j];
    }    

    // Updating 'arr_size' to reflect the size of the 'post_ele_5' array
    arr_size = sizeof(post_ele_5)/sizeof(post_ele_5[0]);                

    // Printing the elements of the new array 'post_ele_5'
    printf("\nElements in new array are: ");  
    print_array(post_ele_5, 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, 3, 5, 7, 9, 11 

Elements in new array are: 7, 9, 11

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Flowchart:

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