c - Naming a file with a loop counter -

how write line runs in loop , uses loop counter k give file name?

int k; for(k = 0; k < 10; k++)     fopen("/home/ubuntu/desktop/" + k + ".txt", "w"); // java-like code 

also how can create folder on local directory put files there instead of using desktop?

there 2 parts question: creating directory, , writing numbered files. try following (updated directory protection set explicitly, correct headers included, , 1 file closed before next 1 opened):

#include <stdio.h> #include <sys/stat.h>  int main(void) {   const char* mydirectory = "/users/floris/newdirectory";   char filename[256];   int ii, ferr;   file *fp;   ferr = mkdir(mydirectory, (mode_t)0700);   for(ii=0; ii< 10; ii++) {     sprintf(filename, "%s/file%d.txt", mydirectory, ii);     if((fp = fopen(filename, "w"))!=null) {       // whatever need     }     else {       printf("could not open %s\n", filename);     }     fclose(fp);   } return 0; }