Given an array of strings in which all characters are of the same case, write a C function to sort them alphabetically. The idea is to use qsort() in C and write a comparison function that uses strcmp() to compare two strings.
C
#include <stdio.h> #include <stdlib.h> #include <string.h> // Defining comparator function as per the requirement static int myCompare(const void* a, const void* b) { // setting up rules for comparison return strcmp(*(const char**)a, *(const char**)b); } // Function to sort the array void sort(const char* arr[], int n) { // calling qsort function to sort the array // with the help of Comparator qsort(arr, n, sizeof(const char*), myCompare); } int main() { // Get the array of names to be sorted const char* arr[] = { "neveropen", "neveropenquiz", "clanguage" }; int n = sizeof(arr) / sizeof(arr[0]); int i; // Print the given names printf("Given array is\n"); for (i = 0; i < n; i++) printf("%d: %s \n", i, arr[i]); // Sort the given names sort(arr, n); // Print the sorted names printf("\nSorted array is\n"); for (i = 0; i < n; i++) printf("%d: %s \n", i, arr[i]); return 0; } |
Output
Given array is 0: neveropen 1: neveropenquiz 2: clanguage Sorted array is 0: clanguage 1: neveropen 2: neveropenquiz
Time Complexity: O(nlogn)
Auxiliary Space: O(1)
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