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Try this:<br />
<br />
/a.out<br />
<br />
My guess is that you're logged in as root and the default PATH for root is NOT to include the current directory or &quot;.&quot;. &nbsp;By saying ./&lt;program_name&gt; you're telling the shell to run the a.out in the current working directory.<br />
<br />
You can also compile with the -o option like this:<br />
<br />
gcc filename.c -o filename<br />
<br />
so the output will go to filename instead of to a.out.<br />
<br />

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Try this:

/a.out

My guess is that you're logged in as root and the default PATH for root is NOT to include the current directory or ".".  By saying ./<program_name> you're telling the shell to run the a.out in the current working directory.

You can also compile with the -o option like this:

gcc filename.c -o filename

so the output will go to filename instead of to a.out.



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I found Jhance answer is correct. By mistake previously I rejected his anwer. Sorry for that.<br />
<br />
Thankyou<br />

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I found Jhance answer is correct. By mistake previously I rejected his anwer. Sorry for that.

Thankyou


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o.k. and Thankyou so much.<br />

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<div class="content wysiwyg-content">
I compiled a c++ file in Unix as gcc filename.cc. It didn't give me any error. But when I type a.out next it is saying file not found or bad command. The same thing is happening when I try to compile and run a C file giving the command cc filename.c and a.out.<br />
<br />
Kindly help me.
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</div>


I compiled a c++ file in Unix as gcc filename.cc. It didn't give me any error. But when I type a.out next it is saying file not found or bad command. The same thing is happening when I try to compile and run a C file giving the command cc filename.c and a.out.

Kindly help me.

To compile and execute a C++ file in UNIX

C++ is an intermediate-level general-purpose programming language, not to be confused with C or C#. It was developed as a set of extensions to the C programming language to improve type-safety and add support for automatic resource management, object-orientation, generic programming, and exception handling, among other features.