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

int main() {

  FILE *pp;
  if((pp = popen("/bin/ls *.c", "r")) == NULL) {
    perror("popen");
    exit(1);
  }

  char filename[1024];
  while(fscanf(pp, "%s", filename) != EOF) {
    char command[1024];
    snprintf(command, 1024, "wc -l %s", filename);
    system(command);
  }
  pclose(pp);

  return EXIT_SUCCESS;
}