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 C++
 
 

µ Dynamic Allocation

 

㹺ҨҾٴ֧µ Dynamic Allocation ѹѺ

   
 
#include <iostream.h>

int main()
{
int *pt1;
int *pt2;

int one=1;
int two=2;
	pt1=&one;
	*pt1=*pt1+two;

	*pt2=two;
	two=two+1;

	cout<<*pt1<<"\n";
	cout<<*pt2<<"\n";
	cout<<one<<" "<<two;
return 0; }
 
   

[Download Code]

ҧêԴµͧ͡ * ˹Ҫ͵äѺ 㹵ҧҧµ쪹Դ integer 2 еøա 2 ǤѺ ҡҡͧ one pt1 ͧ & Ѻ ҡҡǡŢͧµ two ѹ¤ µҹ鹪价 one ѧ ͺǡҢͧµ two Ңͧ one ж١ǡ͹ѹ

ҡҡ pt2 价Ңͧ two ͹ѹáФѺ ѧ鹶¹Ңͧ two µ¹仴 ǡѹ¹Ңͧ pt2 Ңͧ two ¹仴¤Ѻ

   
 
#include <iostream.h>

int main()
{
int *pt1,*pt2;
int index=10;
pt1=&index; pt2=pt1; cout<<index<<" "<<*pt1<<" "<<*pt2; return 0; }
 
   

[Download Code]

ҧʴԸաˤҾµµҹͧѺ

ѧ¹觤ҡѺ

ҡ͸Ժͧҷѧ蹹§ҡͻ Ҩ¹ѹҧ ͡Ѻǹͧѹѧ ҵͧҷ¹仴 ҡеͧµФѺ

   
 
#include <iostream.h>

void set(int height,int *lenght);


int main()
{
int h=170;
int l=60;

	cout<<"Height ="<<h<<"\n";
	cout<<"Lenght ="<<l<<"\n";

	set(h,&l);

	cout<<"Height ="<<h<<"\n";
	cout<<"Lenght ="<<l<<"\n";


	return 0;
}

void set(int height,int *lenght)
{
	height=100;
	*lenght=50;

	cout<<"Height ="<<height<<"\n";
	cout<<"Lenght ="<<*lenght<<"\n";
}
 
   

[Download Code]

ѧҡѹ͡ҡ þҢͧ height 㹿ѧ蹹դҤ 100 ҾǹͧҢͧ height 170 ҧҡҢͧ lenght ¹Ƕ֧СѺǹͧ ҡѧ¹Ѻ

µѺѧ

   
 
#include <iostream.h>

void square(void);
void three(void);
void (*pt)(void);


int main()
{
	square();
	pt=square;
	pt();

	pt=three;
	pt();

	return 0;

}

void square(void)
{
cout<<"Square"<<"\n";
}

void three(void)
{
cout<<"three"<<"\n";
}
 
   

[Download Code]

ҧʴ繶֧µ 繾µ价ѧ蹤Ѻ ҧ褧ͧ͸Ժ¹ФѺ

Dynamic Allocation

   
 
#include <iostream.h>

struct person
{
	int one;
};

int main()
{
int *pt1,*pt2;
int index=10;
char *name;
person *people;

	pt1=new int;
	*pt1=100;

	pt2=new int;
	*pt2=index;

	name=new char[10];
	name="Vikingdev";

	people=new person;

	cout<<*pt1<<" "<<*pt2<<" "<<name;

	delete pt1;
	delete pt2;
	delete people;
	delete[] name;

	return 0;
}
 
   

[Download Code]

dynamic allocation º͹õ˹ ҧѹç dynamic allocation 鹨繵÷ ѧ鹨֧鹷촴ʵ ҧ dynamic allocation ͨеͧҧµҡ͹ ҡ鹡 new ǵªԴͧ դ觷ѧٴ֧蹡 struct оٴ㹺 ͧ㹵͹ʴԸա new Ҷҵù structure ͧªͧ͢ structure ᷹Ѻ

ѧࡵ㹵ҧҡͧҧ dynamic allocation char ҡͧá˹ӹǹ ẺҧѺ Фǹ͹ èШӹ蹡 繵ͧ * ˹ҹФѺ

͹Шҡеͧ delete ͷµ÷ dynamic allocation Ѻ ѧࡵ źеͧ delete[] ФѺ

 

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