Question

I have written down a program in c and I am trying to create a log file of it.

The problem I am facing is that while printing the outputs of each line in the file I want to write some distinctive feature such as the time of execution of that line or even the line number in the code.

Is there any way I can get to know any of these two.

I don’t mind if you suggest some other way to get a distinctive feature. All I want is that looking at the log file the user gets to know that a certain part of the code was getting executed.

Thanks

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I am working on linux and thus using the GCC compiler….

I have made a header file and in it I am for testing purposes writing __LINE__ . What I want to do is that in a program when I include this function of header file the line number gets printed where the function is. But instead i get the line number of the header file printf statement.

What do I need to do to get the line number of the file .
This is just a test format given below :-

new.h 
       void print()
       {
           printf("Line number is %d",__LINE__);
       }

actual file
       #include "new.h"
       int main()
       {
            print();
       }

Then I want that the line number that should be printed is that of actual file and not new.h which happens now….

Answer 1

Most C compilers provide some macros to identify each line, function, etc. With GCC, for example, you can use __LINE__, __FUNCTION__, and so on. Check your compiler documentation for details. To get a timestamp, you’ll need to let us know what system you’re working on.