/* echofirstword.c 
 *   Neal Nelson 2009.10.02
 *
 * Echo first word of a line and strip leading spaces.
 * Overwrite the buffer provided by the caller.
 * Use strspn to skip leading spaces.
 *
 */

#include <stdio.h>
#include <string.h>

#define MAXLINE 80

main()
{ char buf[MAXLINE];

  while (fgets(buf, MAXLINE, stdin) != NULL ) {
    getArg(buf);
    printf ("%s\n", buf);
  }
}

getArg(char *buf)
{ char* p;
  char ws[] = " \n\t\r\f\v";

  for (p = buf + strspn(buf,ws); !isspace(*p) && *p != '\0'; p++) {
    *buf++ = *p;
  }
  *buf = '\0';
}