Pointer in C are one of the amazing tools that can be used while programming. The are very useful in dynamic allocation and also they decrease the program execution time that is time required to run the program.
By the definition if we talk than :
A pointer is a variable whose value is the address of the another variable.
Declaring a pointer :
type *var-name ;
Here type is the base type of the pointer (it can be int,float,long,double,etc.) while "var-name" is the name of the variable. When asterisk(*) sign is added before the variable than that variable is known as pointer variable.
NOTE :- In case of multiplication asterisk(*) sign is placed after the variable while in case of pointer they are placed before the variable.
int *a; //pointer to an integer
NOTE :- In case of multiplication asterisk(*) sign is placed after the variable while in case of pointer they are placed before the variable.
int *a; //pointer to an integer
double *df; //pointer to a double
char *ch; //pointer to a character
EXAMPLE :
| #include<stdio.h> |
| int main() |
| { |
| int *point, c=98; |
| point = &c; /* Ampersand(&) assigns the address of variable to pointer variable.*/ |
| printf("Value of pointer is : %d", *point); |
| printf("Address to which pointer points : %p",point); |
| } |
