Example
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <unistd.h>
#include <dirent.h>
#include <ctype.h>
int main(int argc, char **argv)
{
const char *dname = (argc > 1 ? argv[1] : ".");
DIR* pdir = opendir(dname);
if(pdir == NULL) {
perror("Can't open directory");
return EXIT_FAILURE;
}
int textfiles=0;
struct dirent* dent;
while ((dent=readdir(pdir))!=NULL) {
int d_name_len = strlen(dent->d_name);
if (d_name_len > 4 &&
strcmp(dent->d_name + (d_name_len - 4), ".txt") == 0) {
textfiles++;
}
}
printf("Number of text files: %i\n", textfiles);
closedir(pdir);
return 0;
}
