anyone who can teach me some basics of low level programming?

[MarkCuering]

---

Turbo C is an IDE developed by borland to write C programming language (DOS). way back late 1990's we use to refer C as TC or Turbo C, bcoz the IDE was famous and it was the easiest way to get start in writing Turbo C... I mean "C" hehehe... sorry. ^_^

[mastertroll2]

Unsa pud difference sa pointer ug reference??

[ben77]

@MarkCuering

thanks for the clarification...

and thanks pod sa mga tips...


pasensya karon lang ko nakareply kay na busy gamay with school activities...


gusto lang ko magkat-on sa previous programming langguage...

we cannot get to where we are going if we don't know where we came from.....


hehehehe

saonz... bahalag wrong mistake sayop grammar.... hehehehe

[nullpointer]

Unsa pud difference sa pointer ug reference??

A pointer variable holds the memory address of the object or type it points to.
Example:
int count; // declare variable count
int *pCount; // declare int pointer variable
count = 1; // initialize
pCount = &count; // assign the address of count to pCount
*pCount++; // increment count indirectly

A reference variable act as an alias of the variable it refers to.
Example:
int count = 1; // declare integer variable count
int &cRef = count; // create cRef as an alias for count
cRef++; // increment count (using its alias cRef)

[ben77]

@nullpointer


good tip...

kalimot na ko ana da... wala man gud to maexplore pag c++ namo before.... balik ko ana ug kat-on...

[MarkCuering]

Okay... here's a lesson for today regarding C. Which is still up to now someone come to me and ask what the heck happen in my code. believe me whether you will find yourself working 5 to 10 years in C without taking a serious understanding on this will condemn you to repeat this mistakes...


1. What's wrong on the code below?

int *pVar1;
pVar = 0
*pVar1 = 32676; 

2. What about this one? still in pointers.

 *p = (char *) malloc(100);  
 *p = 'y'; 

3. They've been teaching us that C++ is superset of C...which I guess not TRUE!... like the code below,

int *p = malloc(sizeof(int) * 1000); 

it is valid in C then why isn't valid in C++? how would I write so it would be valid in both C and C++?

This is just one of the reason why the core dll's in microsoft still in C language...and there's no way they can make it in C++. Even in embedded devices... just think about "void *" Why,When,Where and How...


4.Are expressions of var_array and *var _array same in array of integers? *sigh*

5. lastly,

int main() {

    /*NOTE 1: We defined here local variables */

    int var_int, var_array[2];
             
     /* NOTE 2: defined our pointers the one will hold the int the other one holds the array*/

    int *p1, *p2;

    /* NOTE 3: Finally! p1 points to our variable Integer */

    p1 = &var_int;

    /* NOTE 4: Finally! p2 points to our variable Array at index 0 */

    p2 = &var_array[0];

    /* Now let's assign some values */

    *p1 = 3;          /* var_int now is equal to 3... please see NOTE: 3 */


    *++(p2) = 1;     /* Can you determine what happen now in our var_array???? where the int "1" being stored... See NOTE 4 */

    return 0;
} 

Having lack knowledge of "operator precedence rules" and "dereference operator" in C or C++ would let anyone confuse! This topic is usually in Chapter 1 in your book... which surely be forgetten when you reach CLASSES & OBJECTS...I was been asked way back in my interview where I was not allowed to run the code since it is clearly readable... I haven't answer... how lame I was.... I was thinking that they would ask me some few algorithms or solve some problem... I was confident enough since I know how to capture exceptions or hit F1 in any IDE's and scan proper arguments.... well, I Learn my lessons, which I guess worth to be shared.

[ingkiang]

haha...medyo nkalimot nko ani....thanks bro...worth sharing...

[ben77]

@MarkCuering


Salamat kaayo... thanks for sharing ... dako na kaayo na nga tabang.....

[inagasai]

cge sir apil ko ani gusto pud ko makakat on ani nga assembly language..asa man ato room dapit or sites

[eax]

Art of Assembly Language Programming and HLA by Randall Hyde