void calculate_units_down( long *a, int c, long u, long *b ) {
/* USE:
long a[4] = { // dividend array
1000, // ms >> ss
60, // ss >> mm
60, // mm >> hh
24 // hh >> dd
int c = 4; // number of elements
long u = 1000000000; // start unit
long b[5]; // result array
*/
b[0] = u;
int i;
for ( i=0; i<c; i++ ) {
b[c+1] = b[c] / 1000; // e.g. ss = ms / 1000
b[c] = b[c] % 1000; // e.g. ms = ms % 1000
} // while
} // functionArchiv für den Tag: Fr, 28. Februar 2025
Rekursives Lesen von Verzeichnissen (C)
https://stackoverflow.com/questions/8436841/how-to-recursively-list-directories-in-c-on-linux
z.B.
#include <unistd.h>
#include <sys/types.h>
#include <dirent.h>
#include <stdio.h>
#include <string.h>
void listdir(const char *name, int indent)
{
DIR *dir;
struct dirent *entry;
if (!(dir = opendir(name)))
return;
while ((entry = readdir(dir)) != NULL) {
if (entry->d_type == DT_DIR) {
char path[1024];
if (strcmp(entry->d_name, ".") == 0 || strcmp(entry->d_name, "..") == 0)
continue;
snprintf(path, sizeof(path), "%s/%s", name, entry->d_name);
printf("%*s[%s]\n", indent, "", entry->d_name);
listdir(path, indent + 2);
} else {
printf("%*s- %s\n", indent, "", entry->d_name);
}
}
closedir(dir);
}
int main(void) {
listdir(".", 0);
return 0;
}bearbeitet:
#include <unistd.h>
#include <sys/types.h>
#include <dirent.h>
#include <stdio.h>
#include <string.h>
void listdir( const char *name, int indent ) {
DIR *dir;
struct dirent *entry;
if ( !( dir = opendir( name ) ) ) return;
while ( ( entry = readdir( dir ) ) != NULL) {
if ( entry->d_type == DT_DIR ) {
char path[1024];
if (
strcmp( entry->d_name, "." ) == 0 ||
strcmp( entry->d_name, ".." ) == 0
) continue;
snprintf( path, sizeof( path ), "%s/%s", name, entry->d_name );
printf( "%*s[%s]\n", indent, "", entry->d_name );
listdir( path, indent + 2 );
} else {
printf( "%*s- %s\n", indent, "", entry->d_name );
} // if/else
} // while
closedir(dir);
} // function
int main( void ) {
listdir( ".", 0 );
return 0;
} // main