2回答

• 

  qq_慕斯卡2160049

  2020-06-28 22:58:37

  前面已经声明过了three是int类型，不能重复声明，直接写three=one+two，后面都不能再写int了

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• 

  weixin_慕慕9482981

  2020-06-25 14:31:38

  直接在输出后面写公式就好可，干嘛还要int，这样太复杂了。

  public class HelloWorld{

      public static void main(String[] args) {

      int one = 10 ;

          int two = 20 ;

          int three = 30 ;

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

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

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

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

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

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

  }

  }

  
  

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