C++ ---- 指针和引用

the basic of my C++ is so weakness....because i have not go to class about C++ in my university...

wo lost something when i get something....

get to business , this question puzzled me so long time....

today let's analyse it...

the first , 指针...

int *pointer;

int test=100;

pointer=&test;

the value of pointer is the address of  test.

and *pointer=test;

and ....the other

int test=100;

int *pointer=test;  // this say test is int type value...pointer is pointer type value

and this is equal to int *pointer=&test;

and also equal to :

int *pointer;

pointer=&test;

if you change the value of test , the value of pointer not change...

this is 指针...

the second...指针数组

int test[20];

int *pointer=test; or

int *pointer=&test[20]; or

int *pointer; pointer=test;  or

int *pointer; pointer=&test[20];

the value of pointer is the address of a[0]...

then....pay attention to this...

test[i]=*(test+i)=pointer[i]=*(pointer+i);

&test[i]=test+i=&pointer[i]=pointer+i;

and sizeof(test)!=sizeof(*test)...

 tomorrow go on...