摘要：
#include <stdio.h> int main() { int i, j, k; for (i = 0; i <= 20; i++) //公鸡 { for (j = 0; j <= 33; j++) //母鸡 { //for (k = 0; k <= 100; k+=3) //小鸡 //{ 阅读全文
摘要：
#include < iostream > using namespace std; class BaseClass { public: virtual void fn1() { cout << "B1" << endl; } void fn2() { cout << "B2" << endl; } 阅读全文