1#include<iostream> 2 using namespace std; 3 class test{ 4 int mvalue; 5 public: 6 test(int i){ 7 cout << "test(int i)=" << i << endl; 8 mvalue = i; 9 } 10 test(const test& obj){ 11 cout << "const test& obj" << endl; 12 this->mvalue = obj.mvalue; 13 } 14 int value(){ 15 return mvalue; 16 } 17 test& operator++(){ 18 ++mvalue; 19 return *this; 20 } 21 //后++ 22 test operator++(int){ 23 cout << "test operator++" << endl; 24 test ret(mvalue); 25 mvalue++; 26 cout << "mvalue=" << mvalue << endl; 27 return ret; 28 } 29 }; 30 int main(){ 31 test t(0); //test(int i)=0 32 test tt = t++; //test operator ++; test(int i)=0 33 34 cout << tt.value() << endl; 35 cout << t.value() << endl; 36 return 0; 37 } 38 //结果 39 test(int i)=0 40 test operator++ 41 test(int i)=0 42 mvalue=1 43 0 44 1