C Program to Sort an array of names or strings


Given an array of strings, 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.

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

static int myCompare (const void * a, const void * b)
    return strcmp (*(const char **) a, *(const char **) b);

void sort(const char *arr[], int n)
    qsort (arr, n, sizeof (const char *), myCompare);

int main ()
    const char *arr[] = {"GeeksforGeeks", "GeeksQuiz", "CLanguage"};
    int n = sizeof(arr)/sizeof(arr[0]);
    int i;

    printf("Given array is\n");
    for (i = 0; i < n; i++)
        printf("%d: %s \n", i, arr[i]);

    sort(arr, n);

    printf("\nSorted array is\n");
    for (i = 0; i < n; i++)
        printf("%d: %s \n", i, arr[i]);

    return 0;


Given array is
0: GeeksforGeeks
1: GeeksQuiz
2: CLanguage

Sorted array is
0: CLanguage
1: GeeksQuiz
2: GeeksforGeekss

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