1回答

• 

  南泉彬哥

  2017-11-03 23:39:46

  你把顺序调换一下，就清楚了：
  

  int one = 10 ;       
  

  int two = 20 ;       
  

  int three = 0 ;               
  

  three=one+two;       
  

  System.out.println("three=one+two==>"+three);       
  

  three+=one;       
  

  System.out.println("three+=one==>"+three);
  

  0 0