Difference between revisions of "Interview Preparation Pointers"
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</pre> | </pre> | ||
The above example , we have declared a pointer to a variable (pointer_to_integer), the variable stores the address of an integer . | The above example , we have declared a pointer to a variable (pointer_to_integer), the variable stores the address of an integer . | ||
| + | |||
| + | Code: | ||
| + | <pre> | ||
| + | #include <stdio.h> | ||
| + | |||
| + | int main(void) { | ||
| + | int var = 20; | ||
| + | int *p; | ||
| + | p = &var; | ||
| + | |||
| + | printf("Pointer %d\n",var); | ||
| + | printf("Pointer %d\n",&var); // Prints the address of the varaible (var) | ||
| + | printf("Pointer %d\n",p); | ||
| + | printf("Pointer %d\n",*p); // Prints the value that (p) points to | ||
| + | return 0; | ||
| + | } | ||
| + | </pre> | ||
| + | |||
'''Under_construction''' | '''Under_construction''' | ||
Revision as of 04:35, 5 December 2016
Pointers : A pointer is a variable who's value is address of some other variable i.e. it can be address of some memory location.
<varaible_type> *<name>
eg :
int *pointer_to_integer
The above example , we have declared a pointer to a variable (pointer_to_integer), the variable stores the address of an integer .
Code:
#include <stdio.h>
int main(void) {
int var = 20;
int *p;
p = &var;
printf("Pointer %d\n",var);
printf("Pointer %d\n",&var); // Prints the address of the varaible (var)
printf("Pointer %d\n",p);
printf("Pointer %d\n",*p); // Prints the value that (p) points to
return 0;
}
Under_construction
