Program in C to demonstrate qserch , string and dynamic pointer array

#include "stdio.h"

#include "stdlib.h"

#include "string.h"

void sortstrarr(void *array, unsigned n);

static int cmpr(const void *a, const void *b);

int main (void)

{

char **strarray = NULL;

int i = 0, strcount = 0;

char line[1024];

while((fgets(line, 1024, stdin)) != NULL)

{

if(strlen(line) == 1)

continue;

           

strarray = (char **)realloc(strarray, (strcount + 1) * sizeof(char *));

strarray[strcount++] = strdup(line);

}

printf("### Before ###\n");

for(i = 0; i < strcount; i++)

printf("%2d: %s", i, strarray[i]);

sortstrarr(strarray, strcount);

printf("### After ###\n");

for(i = 0; i < strcount; i++)

printf("%2d: %s", i, strarray[i]);

/* free mem... */

for(i = 0; i < strcount; i++)

free(strarray[i]);

free(strarray);

return 0;

}

static int cmpr(const void *a, const void *b)

{

return strcmp(*(char **)a, *(char **)b);

}

void sortstrarr(void *array, unsigned n)

{

qsort(array, n, sizeof(char *), cmpr);

}