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C / C++ »

[7 May 2011 | 2 Yorum | 1.754 views ]
C / C++ Courses ? 11 (Negation Operator and For Loops)

The Negation Operator (! ? NOT)
x=3;
if(! (x>10) )
printf(?%d?,x); //it will print ?3?.
if(!0)
printf(?hey?); //it will print ?hey?.
if(!x)
printf(?%d?,x); //it will print nothing.

!true=false
!false=true

3 Steps Which We Should Follow

1- Declare the input and use scanf initialized before while
2- Use the input in condition while and compare it with sentinal value
3- Change the input using scanf before the end of the loop

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C / C++ »

[25 Ara 2010 | 2 Yorum | 1.598 views ]
C / C++ Courses ? 10 (Pre-increment and Post-increment)

Pre-increment and Post-increment

Pre-increment changes the value of the variable, and then makes the calculation or processes which should be done. (It?s written like this: ?++x ?)

Post-increment makes the processes and then changes the value of the variable. (It?s written like this: ?++x ?)

Decrement versions of these are the same. (?–x? or? x–?)

int x=3;

printf(?%d?, ++x); //it will change the value of x to 4 and then print 4…

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C / C++ »

[18 Ara 2010 | Yorum Yok Kii | 1.499 views ]
C / C++ Courses ? 9 (While Loops)

While Loops

*Counter Controlled Loops:

Steps that we should follow:

? 1- Declare and initialize a counter

? 2-Use the counter in the condition part of while

? 3-Change the value of the counter inside the loop (increment or decrement)

¤ These 3 steps must be used in our program, else it means there is something wrong.

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C / C++ »

[29 Eki 2010 | 5 Yorum | 1.885 views ]
C / C++ Courses ? 7 (Review and Continue with If Statements)

Let?s start with an example to remember previous course.

Write a program that enters a final grade of student and prints if the student passed or failed. (40 and above passed)

#include

int main(){

int grade;

printf(?Enter the grade: ?);

scanf(?%d?,&grade);

(continues)…

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C / C++ »

[3 Ağu 2010 | 1 Yorum | 2.047 views ]
C / C++ Courses ? 6 (Conditions – If Statements)

They are used to compare some values and operate according to result.

The result can be true or false.

* If the condition is true, it operates everything in if statement.
* If the condition is false, it skips whole if statements and continue.

We can build conditional statements in two forms:

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C / C++ »

[3 Ağu 2010 | 4 Yorum | 1.591 views ]
C / C++ Courses ? 5 (Calculations)

Let’s continue with calculation in C!
First of all, we should know about order of mathematical operations. Basicly, we can say the order is like that:
1) ( ) paranthesis
2) * (product), / (division) , % (remainder of division)
3) + (summation), – (difference)
If operations are in the same order ( like + and – ), than the priority belongs to one that comes first.
Example;
int x= 5 * 4 / 2 + ( 4 + 2 );
If we print, it will find x …

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C / C++ »

[26 Tem 2010 | 2 Yorum | 1.770 views ]
C / C++ Courses ? 4 (Execution & Input)

Let’s start!
To write and execute a program:

Edit : writes codes of the program on a suitable platform
It creates a file which has “cpp” extension. For example: “First.cpp”
Preprocess : adds header files and then checks for errors before compiling
Compile :

checks for syntax errors
converts program code into object code(machine language code)

At this point, “First.cpp” becomes “First.obj”
Link : makes object code and files in preprocessing work together
Load : loads program into memory (CPU will take instructions)
Execute : runs every line in memory, but …

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C / C++ »

[23 Tem 2010 | 1 Yorum | 1.682 views ]
C / C++ Courses ? 3 (Variables)

Let’s talk about variables and usage of conversion specifiers now.
What is a variable?

* It’s a location in memory
* It’s used to store input and results. (Results can be output as well)
* It has a name and a data type
* We specify the location in memory by declaring

Three things that we can do with variables are declaration, initialization and using it.If you use a variable without declaring it, it will give you an error “undeclared identifiers”.

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C / C++ »

[22 Tem 2010 | C / C++ Courses ? 2 (Output, Escape Characters & Comments) için yorumlar kapalı | 1.273 views ]
C / C++ Courses ? 2 (Output, Escape Characters & Comments)

Let’s continue to refresh our minds:

The first function that we should know is printf function..

This function is used for output. The usage of this function is so simple.

Whatever you want to write as output on the screen, you can put this between quotation marks (” “)

printf(” (Things that you want to see on the screen will be here) “);

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C / C++ »

[19 Tem 2010 | 2 Yorum | 1.598 views ]
C / C++ Courses ? 1 (Introduction to C)

Let’s start with memories. There are two kinds of memory:

Temporary Memory: Also called “Primary Memory“. When we say temporary memory, RAM comes to our minds. It contains little space, but it is expensive.
Permanent Memory: Also called “Secondary Memory“.You know this is related to Hard Disc. It needs more space, but it is cheaper than temporary memory.

This theoratical information is enough for now. Let’s make a quick start to programming. The basic terms that a C Program should have, …

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