Solution for Exercise 23-2

ex2302

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

int main()
{
    DIR *folder;
    struct dirent *file;

    folder=opendir(".");
    if(folder==NULL)
    {
        puts("Unable to read directory");
        exit(1);
    }
    while(file = readdir(folder))
        printf("Found the file '%s'\n",file->d_name);
    closedir(folder);
    return(0);
}

Notes

* As long as the readdir() function returns a pointer to a dirent structure (Line 16), the while loop spins and directory entries are read.

* Feel free to ignore any "suggest parentheses" warning about Line 16. The compiler sees the single = sign and assumes that you meant to specify two, such as == for "is equal to." In the context as presented in this code, the statement is correct. That's why the compiler issued a warning and not an error.

Exercise ex2303 →