?? overhead.cpp
字號:
//: C22:Overhead.cpp
// From Thinking in C++, 2nd Edition
// Available at http://www.BruceEckel.com
// (c) Bruce Eckel 1999
// Copyright notice in Copyright.txt
// Virtual base class overhead
#include <fstream>
using namespace std;
ofstream out("overhead.out");
class MBase {
public:
virtual void f() const {};
virtual ~MBase() {}
};
class NonVirtualInheritance
: public MBase {};
class VirtualInheritance
: virtual public MBase {};
class VirtualInheritance2
: virtual public MBase {};
class MI
: public VirtualInheritance,
public VirtualInheritance2 {};
#define WRITE(ARG) \
out << #ARG << " = " << ARG << endl;
int main() {
MBase b;
WRITE(sizeof(b));
NonVirtualInheritance nonv_inheritance;
WRITE(sizeof(nonv_inheritance));
VirtualInheritance v_inheritance;
WRITE(sizeof(v_inheritance));
MI mi;
WRITE(sizeof(mi));
} ///:~
?? 快捷鍵說明
復制代碼
Ctrl + C
搜索代碼
Ctrl + F
全屏模式
F11
切換主題
Ctrl + Shift + D
顯示快捷鍵
?
增大字號
Ctrl + =
減小字號
Ctrl + -