C++有四種類型轉(zhuǎn)換操作符：static_cast、const_cast、dynamic_cast、reinterpret_cast。
1>. static_cast普通轉(zhuǎn)換，如double轉(zhuǎn)int：
1 double a = 10;
2 int b = static_cast<int>(a);
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2>. const_cast改變const或者volatile屬性:
1 const char* szA = "test";
2 char* szB = const_cast<char*>(szA);
3>. dynamic_cast把指向基類的指針或引用轉(zhuǎn)換成指向派生類或者基類的兄弟類的指針或引用：
1 class Base
2 {
3 public:
4 virtual void test(){} //基類必須有虛函數(shù)
5 };
6
7 class Child : public Base
8 {
9 public:
10 void print(){ cout << "child::base" << endl; }
11 };
12
13 Base* pBase = new Base();
14 Child* pChild = dynamic_cast<Child*>(pBase);
15 pChild->print();
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4>. reinterpret_cast用來(lái)在函數(shù)指針之間進(jìn)行類型轉(zhuǎn)換
1 typedef void (*FuncPtr)();
2 FuncPtr funcPtrArray[10];
3 int doSomeing(){return 0;}
4
5 funcPtrArray[0] = reinterpret_cast<FuncPtr>(&doSomeing);