Difference between revisions of "Interview Preparation topic : Pointers in C"
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Lets Look at the following example: | Lets Look at the following example: | ||
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#include <stdio.h> | #include <stdio.h> | ||
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Address of temp variable: edf53400<br> | Address of temp variable: edf53400<br> | ||
Address of temp1 variable: adf9a5f6 | Address of temp1 variable: adf9a5f6 | ||
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| + | To declare a pointer to a variable do: | ||
| + | type *pointer;<br> | ||
| + | Where type can be int, double, float, char and pointer can be any variable. | ||
Revision as of 22:26, 10 December 2016
What is a Pointer?
A pointer is a variable which contains the address in memory of another variable. Every variable is a memory location and every memory location has its address defined which can be accessed using ampersand (&) operator, which denotes an address in memory.
Lets Look at the following example:
- include <stdio.h>
int main ()
{
int temp;
int temp1;
printf("Address of temp variable: %x\n", &temp );
printf("Address of temp1 variable: %x\n", &temp1 );
return 0;
}
When the following code is compiled and executed:
Address of temp variable: edf53400
Address of temp1 variable: adf9a5f6
To declare a pointer to a variable do:
type *pointer;
Where type can be int, double, float, char and pointer can be any variable.
