#include <iostream>
using namespace std;
class Rectangle {
public:
Rectangle():x1(0),x2(0),y1(0),y2(0){cout<<"default"<<endl;}
// Rectangle(int a1 = 0, int a2 = 0, int a3 = 0, int a4 = 0);
~Rectangle();
void area();
private:
int x1;
int x2;
int y1;
int y2;
};
//Rectangle::Rectangle(int a1, int a2, int a3, int a4) {
// x1 = a1;
// x2 = a2;
// y1 = a3;
// y2 = a4;
//}
Rectangle::~Rectangle() {}
void Rectangle::area() {
cout<<x1<<" "<<x2<<endl;
cout<<y1<<" "<<y2<<endl;
}
int main(void) {
Rectangle r;
// Rectangle r();//會被當成函數聲明
r.area() ;
// Rectangle k(1, 3, 5, 7);
// k.area() ;
return 0;
}
以上是測試代碼。
下面對這種易出錯情況進行總結:
表格來自:yzkdj