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Sed script, changing all C-comments to C++-comments

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# 1  
Old 11-21-2009
Sed script, changing all C-comments to C++-comments
I must write a script to change all C++ like comments:

Code:
// this is a comment

to this one

Code:
/* this is a comment */

How to do it by sed? With file:

Code:
#include <cstdio>
using namespace std; //one

// two
int main() {
  printf("Example"); //    three
}//four

the result should be:


Code:
#include <cstdio>
using namespace std; /*one*/

/* two*/
int main() {
  printf("Example"); /*    three*/
}/*four*/

I don't know how to append */ on the end of line. Can anyone help me?

Best regards,
Lucas
Last edited by black_hawk; 11-21-2009 at 08:20 PM..
# 2  
Old 11-21-2009
Try:

Code:
# sed "s@//\(.*\)@/*\1*/@g" file1  
#include <cstdio>
using namespace std; /*one*/

/* two*/
int main() {
  printf("Example"); /*    three*/
}/*four*/

Of course, this doesn't cater for when there are // inside strings...
# 3  
Old 11-21-2009
Great, thanks a lot. I haven't any // in strings, so it works.
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