[分析题,4分] #include ”iostream.h”class three{ int x,y,z; public: three(int a,int b,int c){ x=a;y=b;z=c;} friend ostream &operator<<(ostream &output, three ob); };ostream &operator<<(ostream &output, three ob){ output<<ob.x<<’,’<<ob.z<<’,’<<ob.y<<endl; return output;}main(){ three obj1(10,20,30); cout<<obj; three obj2(50,40,100);cout<<obj2; }

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