![](https://cos-cdn.shuashuati.com/pipixue-wap/2020-1230-1107-56/ti_inject-812ce.png)
以下程序的执行结果为( )。 #include <iostream.h> class Sample { int n; public: Sample(int i) {n=i;} operator++() {n++;} //前缀重载运算符 operator++(int) {n+=2;} //后缀重载运算符 void disp() { cout<<'n='<<n<<endl; } }; void main() { Sample A(2),B(2); A++; ++B; A.disp(); A.disp(); } A.n=4