XCRUN ERROR: HELP!

[qia360]

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I just run a hello world program and get this error, i don't know what it means to do?


xcrun: error: active developer path ("/Volumes/Xcode 1/Xcode.app/Contents/Developer") does not exist, use `xcode-select --switch path/to/Xcode.app` to specify the Xcode that you wish to use for command line developer tools (or see `man xcode-select`)
Process terminated with status 1 (0 minute(s), 17 second(s))
0 error(s), 0 warning(s) (0 minute(s), 17 second(s))

HERE is my program:

 #include <stdio.h>
int main()
{
  printf ("Hello!\n");
  return 0;
}