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Scripts: C :: Pointers :: Library Article #1

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Using Pointers in C
By: Erobo Team Member

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Brief explanation on how to create Pointers

A pointer in C is a reference to a memory location in your computer. Pointer can be of type int or string, and depending on how you use it you can change the refence.

Let's take a look at Strings with Pointers:

 Code Snippet 1

#include <stdio.h>

main(argc, argv, envp) {

char myString[40] = "This is my new String";

char *myPointer; //pointer of type char
                          //referenced to a memory location
myPointer = &myString[0]; //copy address location of
                                         //first char to myPointer

*myPointer = "Assign Pointer to a new variable"; 

//output result

printf("the value of myPointer is: %d\n",*myPointer); 

}



Now, here is how you can use Integers with Pointers:

 Code Snippet 2

#include <stdio.h>

main(argc, argv, envp) {

    int myInt = 53497;  //an Integer

    int *myIntegerPointer;  //integer pointer

    myIntegerPointer = &myInt;  //initialize

 
    *myIntegerPointer = 24742;  //reset pointer at
                                               //memory location
                                               //put new value 24742
      
      printf("myInt is equal to %d\n", myInt);
}


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