Topic_03 : Debugging practical
Debugging is a nice place to start understanding how computer programs
work. In fact, debugging is treated as an advanced concept for beginners
and is not usually dealt in the academic institutions.
Bug actually means a mistake in our code. Debugging is a process of
removing bugs from our code. Debugging involves a step by step execution
of the statements in our code.
Unless, the programmer is well aware of the work behind the scene, the
programmer can't understand the concepts clearly. Now let's go to the
explanation part on how the computer reacts while executing our program.
Consider our first program..
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# include <Stdio.h>
void main( )
{
printf("Hello World");
}
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steps involved in starting step by step execution of this program..
1) After you type the program, press "F10" key to start
debugging. You'll be prompted if you want the IDE to build your
application. press "Yes" in that prompted box.
2) If there are no errors in your program, an empty console window will appear
on the screen. And also, in the IDE, there appears a yellow arrow at the
starting curly bracket after the main function. That yellow arrow
indicates that, the computer is going to execute the code in the line, pointed
by that arrow.
3) Continue to press "F10", till the yellow arrow crosses the
printf("Hello World"); line. Now, press ALT+TAB to watch the
console window. You observe that, "Hello World" text is printed
on the console window, which was empty earlier.
4) Once, all the code in our program is completed, there won't be any more code
left for the computer to execute. IDE says the same message to you, once
it reaches the end of the program.
Click on "OK" button.
5) Press "F5" key to let the debugging process to get terminated.
This is just starting to learn how to debug. You'll come across more
concepts, that are related to debugging in the later tutorials. Once you
have enough command on the programming language, you can learn more about
debugging.