C 中的拷貝構造 賦值建構函式

c++中的拷貝構造，賦值構造的形式如下：

eg：

a (a &a) 

a(const a &a)  
a &operator = (const a &a)

#includeusing namespace std;

class a 
a(const a &a)  
a &operator = (const a &a) 
a (int t) 
~a() 
};void func(a ret) 
a get() 
int main()

測試結果

address: 89fed0, point:fb1698, val: 1

這是乙個拷貝建構函式

c的：global address: 89fed8, point: fb1698, value: 1

這是乙個拷貝建構函式

傳值：stack address: 89fee0, point: fb1698, value: 1

delete 89fee0

address: 89fee8, point:fb1798, val: 3

從函式返回時stack address: 89fee8, point: fb1798, value: 3

d的：global address: 89fee8, point: fb1798, value: 3

delete 89fee8

delete 89fed8

delete 89fed0

#includeusing namespace std;

class a 
a &operator = (const a &a) 
a (int t) 
~a() 
};void func(a ret) 
a f () 
int main()

測試結果

address: 89fee8, point:f51788, val: 3

stack address: 89fee8, point: f51788, value: 3

這是乙個賦值建構函式

delete 89fee8

global address: 89fed8, point: f51788, value: 3

address: 89fee0, point:f51698, val: 1

global address: 89fee8, point: f51698, value: 1

delete 89fee8

delete 89fee0

delete 89fed8

a( a);

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