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

#include <sys/types.h>
#include <dirent.h>

void printFile(const char *path, const int lvl);

void dirTraveler(const char *startDir, const int lvl);

int main()
{
	dirTraveler(".",0);
	return 0;
}

void dirTraveler(const char *startDir, const int lvl)
{
    char path[1000];
    strcpy(path, startDir);

    DIR *dir=opendir(path);
    if(dir)
    {
	struct dirent *de = readdir(dir);
        while(de)
        {
			if(de->d_type == DT_REG && strstr(de->d_name,".txt"))
			{
				int path_len = strlen(path);
                strcat(path, "/");
                strcat(path, de->d_name);
				printFile(path, lvl);
                path[path_len] = '\0';
			}
            if(de->d_type == DT_DIR && 0!=strcmp(".", de->d_name) && 0!=strcmp("..", de->d_name))
            {
                int path_len = strlen(path);
                strcat(path, "/");
                strcat(path, de->d_name);
                dirTraveler(path, lvl+1);
                path[path_len] = '\0';
            }
           de = readdir(dir);
        }
    }
    closedir(dir);
}

void printFile(const char *path, const int lvl)
{
	int i;
	char s[100];
	for(i=0;i<lvl;i++)
		printf("\t");
	printf("%s[\n", path);
	
	FILE *f = fopen(path, "r");
	if(f)
	{
		while(fgets(s,sizeof(s)/sizeof(char),f))
		{
			for(i=0;i<lvl+1;i++)
				printf("\t");
			printf("%s",s);
		}
		fclose(f);
	}
	
	for(i=0;i<lvl;i++)
		printf("\t");
	printf("]\n");
}