Differences between declaration and initialization in C/C++

Simple definition of declaration and initialization in C/C++. Both are same in C and C++.
Declaration: A declaration is a statement in C and C++ that says " Here is the name of variable and type of the variable". i am not telling you anything more about it.

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int a;        // declaration of a integer
int *p;       // declaration of pointer to integer
char ch;      // declaration of character
char *ptr;    //declaration of pointer to character
int fun(int); //declaration of function
struct add;   //declaration of structure

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Initialization: Initialization is definition where variable is also given a value. Some languages automatically initialize a value to all variable such as 0 and some language don't initialize.

int a       //declaration of integer variable
a=10        //initialization of integer variable
int b=10    //declaration and initialization of integer variable
int *p=&a   //declaration and initialization of pointer to integer
char ch     //declaration of pointer to character
ch='c'      //initialization of character variable
char *ptr   //declaration of pointer to character variable
ptr=&ch     //initialization of pointer to character variable