Glenn's Space

EXPLANATION:

Yung katabi ng mga nasa #include, yan yung tinatawag na headers. Kaya nga may .h na nakalagay. Basically #include is a function that will include files, such as your headers or your other files. Kunwari, #include “this_is_my_second_function.c”

Now, what is the difference between “ “ and < > ? The quotation tells the reader that these are your own files. < > indicates, on the other hand that the file is in the compiler itself.

The int main(void) { } is our main function. Later on, I will show you how to make your own function such as delay.

VARIABLES & VARIABLE DECLARATIONS

Variables are used to store different types of data. Kumbaga sa Assembly Low level Programming language, ito ay isang registers. Parang sa microprocessor. Anyway, there are two types of variables (there are the two ways of declaring your variables inside your program.

Now, ano anman ang pinagkaiba nitong dalawang ito? Ewan ko. Joke.

Global Variables – ito yung mga variables na nasa taas ng ating mga mga functions. Usually nasa itaas ng main function. Pero ang pinakamabisang pageexplain kung pano masasabi na ang isang variable ay globally declared ay sa pamamagitan ng pagtingin kung ito ay nasa ilalim ng mga headers. Magulo ba? Tsss.

Local Variables – ito yung mga variables na nasa loob ng isang certain functions.

Note that all local variables are merely accessible inside your function where it is declared. While the global variable, on the other hand, can be accessed by any of your functions anytime.

So, hindi ko na ieexplain yung “;” at yung mga uri ng DATA TYPES ha? Pero sige, konti lang. “;” ito ay yung tinawag kong TERMINATOR noong 2^nd year college ako na nauso naman sa buong klase at until now ginagamit ng mga kakalse ko. Hindi ko talaga alam kung ano ang official na tawag dyan sa programming, basta ang term ko dyan ay terminator.

MACRO DEFINITIONS

Let us go to macro function for awhile. I learned this one when I was in 2^nd year ulit. Hehehe. Effective ito lalo na kapag may exam ka at gusto mong mauna magpacheck. XD. Ito ay gamit sa pagpapaikli at pagdeclare ng CONSTANTS.

Macros are defined by the #define directive

Examples:

//this allows NUMBER to represent 3

#define NUMBER 3

//this allows SHOW to represent the printf() instruction

#define SHOW printf(“Hello World!”);

Commonly used data types

char(8 bits)

 int (16 bits)

 float (32 bits)

Array – a group of elements having the same data type

Example: char string[100] – an array named “string”

composed of 101 characters (from string[0] to string[100])

Variable Declarations

Variables are declared by the data type and variable name

if you want to continue reading this, download this full pdf file:

https://docs.google.com/open?id=0B-f2PRoUkrBDRE1iU1d4U1d3NEE

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