C language 01

Before the all in the Evernote record

Continue ends the loop body and enters the next cycle.
Break directly ends the entire while loop

Parameter: Parameters in the function name after a timer function
Arguments: The specific data passed in when the function is called
The base data type is a formal parameter, is purely a value pass, modifies the value of a function's internal parameter without affecting the argument value

Role of Rerurn: 1, Exit function

2. Returns the specific reference to the function caller.

The function of void: No return value, can also return;

void login (QQ, password)

{

If QQ has no value

1, if (QQ no value) return;

If the password does not have a value

2, if (password no value) return;

3, QQ and password to send to the server.

}

1, the function name does not declare the data type, the system automatically defaults to the int type. such as test () = int Test ()

2. By default, the C language does not allow two functions of the same name to appear.

3. Functions cannot be nested defined.

4. Functions cannot be defined repeatedly, but can be declared repeatedly.

void A ();//Declaration

Vodi A ();

int main ()

{

}

void A ()

{

}//definition

5, there is a function declaration, there is no definition, the function can be compiled, can not be linked. PS: The compiler only detects syntax when compiling, and does not detect whether a function is defined. The definition is detected when the compiler links.

C language 01