strstr

strstr(const char *s1, const char *s2);

find s2 from s1, search until 0

ex:

char a[100] = "bbbbaaaa";

a[2]= 0;

printf("%d\n", strstr(a, "a"));

---> can not find

friend class

ex:

if A class wants B class can access A's protected method,

A must define B as its friend class

Programming: Principles and Practice using C++

new book

void parameter

in c,

int a()  &  int a(void) are different

a() can accept an infinite number of parameters,

a(void) can accept zero parameter

function pointer in c++

testFunPtr is not a static function 

testFunPtr2 is a static function

correct:

int (com_scsi_command_driver::*pt2Function)()=       &com_scsi_command_driver::testFunPtr;

int (*pt2Function)()= 

&com_scsi_command_driver::testFunPtr2;

wrong:

int (*pt2Function)()= &com_scsi_command_driver::testFunPtr;

file IO

in fcntl.h

O_RDONLY

typeof

get type:

ex:
typeof(int) intVar1=1;
typeof(intVar1) intVar2=intVar1;
typeof(int*) intPtrVar1=&intVar1;
typeof(intPtrVar1) intPtrVar2=intPtrVar1;
printf("%d %d %d %d\n", intVar1, intVar2, *intPtrVar1, *intPtrVar2);

result: 1 1 1 1