C Exercises: Sort the elements of an array
6. Array Sorting
Write a C program to sort the elements of an array.
Sample Solution:
C Code:
#include<stdio.h> // Include the standard input/output header file.
#include<stdlib.h> // Include the standard library header file.
// Comparator function used for qsort.
int comparetor (const void * x, const void * y)
{
return ( *(int*)x - *(int*)y );
}
int main () // Start of the main function.
{
int my_array[100]; // Declare an integer array 'my_array' with a maximum size of 100.
int n,i; // Declare integer variables 'n' and 'i'.
printf("\nInput the number of elements to be stored in the array :"); // Prompt the user to input the number of elements.
scanf("%d",&n); // Read the user's input and store it in 'n'.
printf("Input %d elements in the array :\n",n+1); // Prompt the user to input the elements of the array.
for(i=0;i<n;i++) // Start of a for loop to iterate over the elements of the array.
{
printf("element - %d : ",i); // Prompt the user for the value of the current element.
scanf("%d",&my_array[i]); // Read the user's input and store it in the current element of 'my_array'.
}
qsort (my_array, n, sizeof(int), comparetor ); // Sort the array 'my_array' using the qsort function and the 'comparetor' function.
printf("\nAfter sorting the array are :\n"); // Print a message indicating that the array has been sorted.
for (i=0; i<n; i++) // Start of a for loop to iterate over the sorted elements of the array.
printf ("%d \n",my_array[i]); // Print the current element of the sorted array.
return 0; // Return 0 to indicate successful execution of the program.
} // End of the main function.
Sample Output:
Input the number of elements to be stored in the array :5
Input 6 elements in the array :
element - 0 : 2
element - 1 : 4
element - 2 : 3
element - 3 : 1
element - 4 : 5
After sorting the array are :
1
2
3
4
5
Flowchart:
For more Practice: Solve these Related Problems:
- Write a C program to sort an array of integers in descending order using qsort() with a custom comparator.
- Write a C program to sort an array of strings in alphabetical order using a user-defined comparison function.
- Write a C program to implement bubble sort on an array of integers and count the number of swaps performed.
- Write a C program to sort an array of structures based on one of their integer fields using qsort().
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