1 多态改错，写出执行结果 class A{ int i , j; A(int a,int b){ i=a;j=b; }

Oct 29, 2014

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1 多态改错，写出执行结果 class A{ int i , j; A(int a,int b){ i=a;j=b; } int add(){return i+j;} } class B extends A{ B(int a , int b){ super( a,b); } int add(){ return i*j;} } class C extends B { C(int a , int b){ super( a,b); } int add(){ return i-j; } }

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1 多态改错，写出执行结果 class A{ int i , j; A(int a,int b){ i=a;j=b; }

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1 多态改错，写出执行结果 class A{ int i , j; A(int a,int b){ i=a;j=b; } int add(){return i+j;} } class B extends A{ B(int a , int b){ super( a,b); } int add(){ return i*j;} } class C extends B { C(int a , int b){ super( a,b); } int add(){ return i-j; } } class hello2 { public static void main(String args[] ) { A a = new A(1,2); B b =new B(5 , 3); C c = new C(6,2); a=b; b=c;c=(C ) a; System.out.println( b.add() ) ; }