December 7 function function

Function

1. What is a function and why do you use a function

function is a piece of code that will function as a modular

Stability can be reused

2. How functions are defined

Two ways to define it: 1. Declare after declaration (the implementation part of the function is longer)

2. Declaration and implementation put together (logic simple note: Must be placed in front of the main function)

The reason is that the execution of the program follows from top to bottom

Function naming rules: first letter lowercase

The format of the function (the void type does not require a return value)

return value type name ( parameter, parameter, parameter ) {

function Body

Code

Return

}

int add (int a, int b) {

int result = a + B;

return result;

}

void print (int a) {

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

}

3. Invocation of functions

int result = Add (10, 20);

print (result);

The style of ps://programming

Try not to see the actual implementation in the main function, only the logical result

December 7 function function