Table of Contents
data Keyword 1
dynamic memory allocation (malloc/free)
Definition
dynamic memory allocation is the task of allocating a free chunk of memory specific to the size you predetermine in bytes, by using the malloc function. The chunk of memory is not always in the same location hence being “dynamic” instead of static. By using the “free” function, that will release the block of memory back to the system.
References
List any sites, books, or sources utilized when researching information on this topic. (Remove any filler text).
- wikipedia
- class
- Reference 3
data Keyword 1 Phase 2
passing by address (function parameter passing)
Definition
Passing by address is just one of the ways that you pass a variable into a function. This is done not by passing the variable itself, but by passing the variable address. The only uses for this type of variable passing that I have encountered are arrays.
References
Demonstration
Demonstration of the indicated keyword.
If you wish to aid your definition with a code sample, you can do so by using a wiki code block, an example follows:
#include <stdio.h> void tripnum(int *x) { *x = (*x) * (*x) * (*x); } int main ( ) { int num = 10; tripnum(&num); printf(" Value of num is %d\n”, num); // Value of num is 1000 return (0); }
Alternatively (or additionally), if you want to demonstrate something on the command-line, you can do so as follows:
lab46:~/src$ gcc -otripnum tripnum.c lab46:~/src$ ./tripnum Value of num is 1000