Mega Code Archive
Qsort [string, dynamic pointer array]
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#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);
}
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