Array and pointor

int ia[]={ 0, 1, 2, 3, 4, 5};

for(size_t i=0;i!= 6;i++)

cout<<ia[i];

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int ival=1024,ival2=2048;

int *pi=&ival, *pi2=&ival2;

pi=pi2;

cout<<ival<<"/r/n";

cout<<ival2<<"/r/n";

cout<<*pi<<"/r/n";

cout<<*pi2<<"/r/n";

ival=1024,ival2=2048;

int &ri=ival, &ri2=ival2;

ri=ri2;

cout<<ival<<"/r/n";

cout<<ival2<<"/r/n";

cout<<ri<<"/r/n";

cout<<ri2<<"/r/n";

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Console result: 

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1024

2048

2048

2048

2048

2048

2048

2048

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int ival=1024;

int *pi=&ival;

int **ppi=&pi;

cout<<ival<<"/r/n";

cout<<*pi<<"/r/n";

cout<<**ppi<<"/r/n";

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Console result: 

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1024

1024

1024

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const pointer point to  a const value

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const double pi=3.14;

const double *cptr=&pi;

double dval=3.14;

////*cptr=&dval; //error: *cptr might be const

cptr=&dval;//ok:but cannot change dval through cptr

dval=3.14159;

cout<<*cptr<<"/r/n";

cout<<dval<<"/r/n";

double *ptr=&dval;

*ptr=2.72;

cout<<*cptr<<"/r/n";

cout<<dval<<"/r/n";

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Console result: 

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3.14159

3.14159

2.72

2.72

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typedef string *pstring;

const pstring cstr;

<==>

string *const cstr;

c style: #include  <string.h>

c++ style: #include <cstring>

typedef int int_array[3];

int_array *ip=ia;

For(int_array *p = ia; o != ia+3; ++p)

{

   for(int *q = *p; q != *p+4;++q)

  {

         cout<<*q;

  }

}

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Terminology:

c-style string

Compiler extension

Compound type

Const void*

Delete expression

dimension

Dynamically allocated

Free store

heap

New expression

pointer

Pointer arithmetic

precedence

ptrdiff_t

Size_t

*opertator

++operator

[]operator

&operator

void*