C语言 sscanf 双打

sscanf for doubles

提问by bobobobo

This is a simple problem, but I can't see it:

这是一个简单的问题，但我看不到：

  char *s = "f 8.649292" ;
  double d ;
  sscanf( s, "f %f", &d ) ;

  printf( "d is %f\n", d ) ;

Why is dnot containing the double value 8.649292?

为什么d不包含双精度值8.649292？

回答by bobobobo

Oh wait, nevermind. d needs to be a float.

哦等等，没关系。d 需要是一个float.

And to make it work you could use %lffor a double

为了使它工作，你可以使用%lf双倍

  char *s = "f 8.649292 " ;
  double d ;
  sscanf( s, "f %lf", &d ) ;

  printf( "d is %lf\n", d ) ;