Xing

• Sep 13th, 2007

 

In case of C Functions.

Declaration: When we write the prototype of the function before using it, this is called function declaration.

Definition: When we define code for the function with the function name itself, it is called function definition.

manishmodgil

 Profile Answers by manishmodgil 

• Dec 28th, 2007

 

DECLARATION : declaration only creates the variable name and nothing exists against it. i.e no memory space is consumed.

eg. extern a;

DEFINITION : definition declares as well as assigns some value to the variable.

eg.  int a;

even though we are not mentioning any value default value is provided by the C compiler.

eg. int a=10;

jontyrodes

 Profile Answers by jontyrodes 

• May 9th, 2008

 

Definition
int * i
i is definitionsince we can store a address without allocating memory
*i is definition since we can assign *i = 4 ;

Definition
char *c
c is definition since it can store a address of a character
*c is definition since it can store a character
Now, c is a declaration for storing a string, now i need to allocate memory to store a string..

Comments anyone ???

ashok reddy chenikala

• Aug 31st, 2011

 

Declaration means just identify the datatype and some memory allocation. If we print the value it gives garbage value.

Definition means declaration and assign some value to that variable. i.e. definition = declaration + initialization.