конструкторы - Visual C++ - Ответ 23370

#include  memory.h;

class stack 
{ 
private: 
	enum {empty = -1}; 
	char *s ;  
	int max_len, top; 
public: 
	stack(); 
	stack(int size) 
	{ 
		s=new char[size]; 
		max_len = size; 
		top=empty; 
	} 
	stack(int size, const char str []); 
	stack(const stack &str);
	
	~ stack() 
	{ 
		delete [] s;
	}   

   void reset() 
   {
	   top=empty;
   }

   void push(char c); 
   char pop (); 
   char top_of() const; 
   bool full() const; 
}; 


stack::stack() 
{
	s = new char[1000]; 
	max_len = 1000; 
	top = empty;
} 


stack::stack (int size, const char str [])    
{
	s = new char [size]; 
	max_len = size; 
	for (int i=0; imax_len && str !=0;++i) 
		s[i]=str[i];                             
} 

stack::stack(const stack & str) 
{
	s = new char [str.max_len]; 
	max_len = str.max_len;
	top = str.top; 
	memcpy(s, str.s, max_len);
}        

int main ()
{
                stack data; 
	stack data1(100);      
	stack w(4, "abcd"); 
	return 0; 
}