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

int main( int argc, char * argv[] )
{ 
   double d;        /* variable to hold converted number */
   char *restPtr;   /* pointer variable to hold rest pointer */

   errno = 0;
   d = strtod( argv[1], &restPtr );

   if (errno) perror("ERROR in strtod");
   printf( "Conversion of the string \"%s\"\n", argv[1] );
   printf( " * produces the double value ``%.2g''\n", d);
   printf( " * and leaves the remainder string \"%s\"\n", restPtr );

   return 0;
}