GSL排列组合

#include <stdio.h>#include <gsl/gsl_combination.h>#pragma comment(lib, "libgsl_d.lib")#pragma comment(lib, "libgslcblas_d.lib")int main (void) {  gsl_combination * c;  size_t i;  printf ("All subsets of {0,1,2,3} by size:\n") ;  for (i = 0; i <= 4; i++)    {      c = gsl_combination_calloc (4, i);      do        {          printf ("{");          gsl_combination_fprintf (stdout, c, " %u");          printf (" }\n");        }      while (gsl_combination_next (c) == GSL_SUCCESS);      gsl_combination_free (c);    }  return 0;}