Mixing
Change all the // character for commenting in c++ to the c comment characters /* */ [duplicate]
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up vote
4
down vote
favorite
This question is an exact duplicate of:
replacing and adding at the end of lines with one line sed command
2 answers
I m trying to change some characters in a file, like this:
//this is a thest of how this works
#include <stdio.h>
int main()
// declare some variables here
int num1 = 4;
float num2 = 3.5;
// print the result
printf("The result is %fn", num1 * num2); // this does it
/* does it work? */
return 0;
I want to change all the // character for commenting in c++ to the c comment characters /* */ making the file then look like this:
/* This is a test of how this works */
#include <stdio.h>
/*this is a thest of how this works */
#include <stdio.h>
int main()
/* declare some variables here */
int num1 = 4;
float num2 = 3.5;
/* print the result */
printf("The result is %fn", num1 * num2); /* this does it */
/* does it work? */ */
return 0;
I do not know much bash at all and this is what i came up with sed 's/////* *//g' myprog.c
it did not work, what am i doing wrong or what do i need to do to make these changes? Im trying to make it a one line command
sed
edited 40 mins ago
Jeff Schaller
33.7k851113
asked 1 hour ago
fedora
234
New contributor
fedora is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
marked as duplicate by don_crissti, Jeff Schaller, Goro, andcoz, Romeo Ninov 17 secs ago
This question was marked as an exact duplicate of an existing question.
add a comment |Â
up vote
4
down vote
favorite
This question is an exact duplicate of:
replacing and adding at the end of lines with one line sed command
2 answers
I m trying to change some characters in a file, like this:
//this is a thest of how this works
#include <stdio.h>
int main()
// declare some variables here
int num1 = 4;
float num2 = 3.5;
// print the result
printf("The result is %fn", num1 * num2); // this does it
/* does it work? */
return 0;
I want to change all the // character for commenting in c++ to the c comment characters /* */ making the file then look like this:
/* This is a test of how this works */
#include <stdio.h>
/*this is a thest of how this works */
#include <stdio.h>
int main()
/* declare some variables here */
int num1 = 4;
float num2 = 3.5;
/* print the result */
printf("The result is %fn", num1 * num2); /* this does it */
/* does it work? */ */
return 0;
I do not know much bash at all and this is what i came up with sed 's/////* *//g' myprog.c
it did not work, what am i doing wrong or what do i need to do to make these changes? Im trying to make it a one line command
sed
edited 40 mins ago
Jeff Schaller
33.7k851113
asked 1 hour ago
fedora
234
New contributor
fedora is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
marked as duplicate by don_crissti, Jeff Schaller, Goro, andcoz, Romeo Ninov 17 secs ago
This question was marked as an exact duplicate of an existing question.
1
This has been asked several times (sounds like a new homework assignment), the right answer issedis the wrong tool for this job but good luck anyway...
– don_crissti
59 mins ago
@don_crissti I am so sorry I greatly apologies I didn't know there is an answer for this question
– fedora
46 mins ago
Related: unix.stackexchange.com/questions/163669/…
– Jeff Schaller
21 mins ago
and unix.stackexchange.com/q/72429/117549
– Jeff Schaller
18 mins ago
add a comment |Â
up vote
4
down vote
favorite
up vote
4
down vote
favorite
This question is an exact duplicate of:
replacing and adding at the end of lines with one line sed command
2 answers
I m trying to change some characters in a file, like this:
//this is a thest of how this works
#include <stdio.h>
int main()
// declare some variables here
int num1 = 4;
float num2 = 3.5;
// print the result
printf("The result is %fn", num1 * num2); // this does it
/* does it work? */
return 0;
I want to change all the // character for commenting in c++ to the c comment characters /* */ making the file then look like this:
/* This is a test of how this works */
#include <stdio.h>
/*this is a thest of how this works */
#include <stdio.h>
int main()
/* declare some variables here */
int num1 = 4;
float num2 = 3.5;
/* print the result */
printf("The result is %fn", num1 * num2); /* this does it */
/* does it work? */ */
return 0;
I do not know much bash at all and this is what i came up with sed 's/////* *//g' myprog.c
it did not work, what am i doing wrong or what do i need to do to make these changes? Im trying to make it a one line command
sed
edited 40 mins ago
Jeff Schaller
33.7k851113
asked 1 hour ago
fedora
234
New contributor
fedora is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
This question is an exact duplicate of:
replacing and adding at the end of lines with one line sed command
2 answers
I m trying to change some characters in a file, like this:
//this is a thest of how this works
#include <stdio.h>
int main()
// declare some variables here
int num1 = 4;
float num2 = 3.5;
// print the result
printf("The result is %fn", num1 * num2); // this does it
/* does it work? */
return 0;
I want to change all the // character for commenting in c++ to the c comment characters /* */ making the file then look like this:
/* This is a test of how this works */
#include <stdio.h>
/*this is a thest of how this works */
#include <stdio.h>
int main()
/* declare some variables here */
int num1 = 4;
float num2 = 3.5;
/* print the result */
printf("The result is %fn", num1 * num2); /* this does it */
/* does it work? */ */
return 0;
I do not know much bash at all and this is what i came up with sed 's/////* *//g' myprog.c
it did not work, what am i doing wrong or what do i need to do to make these changes? Im trying to make it a one line command
This question is an exact duplicate of:
replacing and adding at the end of lines with one line sed command
2 answers
sed
sed
edited 40 mins ago
Jeff Schaller
33.7k851113
asked 1 hour ago
fedora
234
New contributor
fedora is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited 40 mins ago
Jeff Schaller
33.7k851113
asked 1 hour ago
fedora
234
New contributor
fedora is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited 40 mins ago
Jeff Schaller
33.7k851113
edited 40 mins ago
Jeff Schaller
33.7k851113
edited 40 mins ago
Jeff Schaller
33.7k851113
33.7k851113
asked 1 hour ago
fedora
234
New contributor
fedora is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 1 hour ago
fedora
234
asked 1 hour ago
fedora
234
234
New contributor
fedora is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
fedora is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
fedora is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
marked as duplicate by don_crissti, Jeff Schaller, Goro, andcoz, Romeo Ninov 17 secs ago
This question was marked as an exact duplicate of an existing question.
marked as duplicate by don_crissti, Jeff Schaller, Goro, andcoz, Romeo Ninov 17 secs ago
This question was marked as an exact duplicate of an existing question.
1
This has been asked several times (sounds like a new homework assignment), the right answer issedis the wrong tool for this job but good luck anyway...
– don_crissti
59 mins ago
@don_crissti I am so sorry I greatly apologies I didn't know there is an answer for this question
– fedora
46 mins ago
Related: unix.stackexchange.com/questions/163669/…
– Jeff Schaller
21 mins ago
and unix.stackexchange.com/q/72429/117549
– Jeff Schaller
18 mins ago
add a comment |Â
1
This has been asked several times (sounds like a new homework assignment), the right answer issedis the wrong tool for this job but good luck anyway...
– don_crissti
59 mins ago
@don_crissti I am so sorry I greatly apologies I didn't know there is an answer for this question
– fedora
46 mins ago
Related: unix.stackexchange.com/questions/163669/…
– Jeff Schaller
21 mins ago
and unix.stackexchange.com/q/72429/117549
– Jeff Schaller
18 mins ago
1
1
This has been asked several times (sounds like a new homework assignment), the right answer is
sed is the wrong tool for this job but good luck anyway...– don_crissti
59 mins ago
This has been asked several times (sounds like a new homework assignment), the right answer is
sed is the wrong tool for this job but good luck anyway...– don_crissti
59 mins ago
@don_crissti I am so sorry I greatly apologies I didn't know there is an answer for this question
– fedora
46 mins ago
@don_crissti I am so sorry I greatly apologies I didn't know there is an answer for this question
– fedora
46 mins ago
Related: unix.stackexchange.com/questions/163669/…
– Jeff Schaller
21 mins ago
Related: unix.stackexchange.com/questions/163669/…
– Jeff Schaller
21 mins ago
and unix.stackexchange.com/q/72429/117549
– Jeff Schaller
18 mins ago
and unix.stackexchange.com/q/72429/117549
– Jeff Schaller
18 mins ago
add a comment |Â
2 Answers
2
active
oldest
votes
up vote
3
down vote
accepted
You only need this:
's+//+/*+g' file | sed 's+/*.*+& */+'
/*this is a thest of how this works */
#include <stdio.h>
int main()
/* declare some variables here */
int num1 = 4;
float num2 = 3.5;
/* print the result */
printf("The result is %fn", num1 * num2); /* this does it */
/* does it work? */ */
return 0;
answered 1 hour ago
Goro
7,52753270
anchoring the//misses the// this does itcomment
– Jeff Schaller
55 mins ago
1
@goro. Thank you very much for the help
– fedora
46 mins ago
add a comment |Â
up vote
1
down vote
sed 's|//(.*)|/*1 */|'
But beware there are a number of cases where it wouldn't do the right thing like in:
char *url = "http://host/";
/*
comment with // nested C++-syle comment
*/
// comment
continued on the next line
To account for those cases and more, you could adapt the code at that other Q&A as:
perl -0777 -pe '
BEGIN
$bs=qr(?:\;
$lc=qr(?:$bsn
s[^rn])*)
defined($1)?"/*$1 */":$&exsg'
Which on the above sample gives:
char *url = "http://host/";
/*
comment with // nested C++-syle comment
*/
/* comment
continued on the next line */
answered 31 mins ago
Stéphane Chazelas
287k53531868
add a comment |Â
2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
3
down vote
accepted
You only need this:
's+//+/*+g' file | sed 's+/*.*+& */+'
/*this is a thest of how this works */
#include <stdio.h>
int main()
/* declare some variables here */
int num1 = 4;
float num2 = 3.5;
/* print the result */
printf("The result is %fn", num1 * num2); /* this does it */
/* does it work? */ */
return 0;
answered 1 hour ago
Goro
7,52753270
anchoring the//misses the// this does itcomment
– Jeff Schaller
55 mins ago
1
@goro. Thank you very much for the help
– fedora
46 mins ago
add a comment |Â
up vote
3
down vote
accepted
You only need this:
's+//+/*+g' file | sed 's+/*.*+& */+'
/*this is a thest of how this works */
#include <stdio.h>
int main()
/* declare some variables here */
int num1 = 4;
float num2 = 3.5;
/* print the result */
printf("The result is %fn", num1 * num2); /* this does it */
/* does it work? */ */
return 0;
answered 1 hour ago
Goro
7,52753270
anchoring the//misses the// this does itcomment
– Jeff Schaller
55 mins ago
1
@goro. Thank you very much for the help
– fedora
46 mins ago
add a comment |Â
up vote
3
down vote
accepted
up vote
3
down vote
accepted
You only need this:
's+//+/*+g' file | sed 's+/*.*+& */+'
/*this is a thest of how this works */
#include <stdio.h>
int main()
/* declare some variables here */
int num1 = 4;
float num2 = 3.5;
/* print the result */
printf("The result is %fn", num1 * num2); /* this does it */
/* does it work? */ */
return 0;
answered 1 hour ago
Goro
7,52753270
You only need this:
's+//+/*+g' file | sed 's+/*.*+& */+'
/*this is a thest of how this works */
#include <stdio.h>
int main()
/* declare some variables here */
int num1 = 4;
float num2 = 3.5;
/* print the result */
printf("The result is %fn", num1 * num2); /* this does it */
/* does it work? */ */
return 0;
answered 1 hour ago
Goro
7,52753270
edited 44 mins ago
answered 1 hour ago
Goro
7,52753270
answered 1 hour ago
Goro
7,52753270
answered 1 hour ago
Goro
7,52753270
7,52753270
anchoring the//misses the// this does itcomment
– Jeff Schaller
55 mins ago
1
@goro. Thank you very much for the help
– fedora
46 mins ago
add a comment |Â
anchoring the//misses the// this does itcomment
– Jeff Schaller
55 mins ago
1
@goro. Thank you very much for the help
– fedora
46 mins ago
anchoring the
// misses the // this does it comment– Jeff Schaller
55 mins ago
anchoring the
// misses the // this does it comment– Jeff Schaller
55 mins ago
1
1
@goro. Thank you very much for the help
– fedora
46 mins ago
@goro. Thank you very much for the help
– fedora
46 mins ago
add a comment |Â
up vote
1
down vote
sed 's|//(.*)|/*1 */|'
But beware there are a number of cases where it wouldn't do the right thing like in:
char *url = "http://host/";
/*
comment with // nested C++-syle comment
*/
// comment
continued on the next line
To account for those cases and more, you could adapt the code at that other Q&A as:
perl -0777 -pe '
BEGIN
$bs=qr(?:\;
$lc=qr(?:$bsn
s[^rn])*)
defined($1)?"/*$1 */":$&exsg'
Which on the above sample gives:
char *url = "http://host/";
/*
comment with // nested C++-syle comment
*/
/* comment
continued on the next line */
answered 31 mins ago
Stéphane Chazelas
287k53531868
add a comment |Â
up vote
1
down vote
sed 's|//(.*)|/*1 */|'
But beware there are a number of cases where it wouldn't do the right thing like in:
char *url = "http://host/";
/*
comment with // nested C++-syle comment
*/
// comment
continued on the next line
To account for those cases and more, you could adapt the code at that other Q&A as:
perl -0777 -pe '
BEGIN
$bs=qr(?:\;
$lc=qr(?:$bsn
s[^rn])*)
defined($1)?"/*$1 */":$&exsg'
Which on the above sample gives:
char *url = "http://host/";
/*
comment with // nested C++-syle comment
*/
/* comment
continued on the next line */
answered 31 mins ago
Stéphane Chazelas
287k53531868
add a comment |Â
up vote
1
down vote
up vote
1
down vote
sed 's|//(.*)|/*1 */|'
But beware there are a number of cases where it wouldn't do the right thing like in:
char *url = "http://host/";
/*
comment with // nested C++-syle comment
*/
// comment
continued on the next line
To account for those cases and more, you could adapt the code at that other Q&A as:
perl -0777 -pe '
BEGIN
$bs=qr(?:\;
$lc=qr(?:$bsn
s[^rn])*)
defined($1)?"/*$1 */":$&exsg'
Which on the above sample gives:
char *url = "http://host/";
/*
comment with // nested C++-syle comment
*/
/* comment
continued on the next line */
answered 31 mins ago
Stéphane Chazelas
287k53531868
sed 's|//(.*)|/*1 */|'
But beware there are a number of cases where it wouldn't do the right thing like in:
char *url = "http://host/";
/*
comment with // nested C++-syle comment
*/
// comment
continued on the next line
To account for those cases and more, you could adapt the code at that other Q&A as:
perl -0777 -pe '
BEGIN
$bs=qr(?:\;
$lc=qr(?:$bsn
s[^rn])*)
defined($1)?"/*$1 */":$&exsg'
Which on the above sample gives:
char *url = "http://host/";
/*
comment with // nested C++-syle comment
*/
/* comment
continued on the next line */
answered 31 mins ago
Stéphane Chazelas
287k53531868
edited 9 mins ago
answered 31 mins ago
Stéphane Chazelas
287k53531868
answered 31 mins ago
Stéphane Chazelas
287k53531868
answered 31 mins ago
Stéphane Chazelas
287k53531868
287k53531868
add a comment |Â
add a comment |Â
1
This has been asked several times (sounds like a new homework assignment), the right answer is
sedis the wrong tool for this job but good luck anyway...– don_crissti
59 mins ago
@don_crissti I am so sorry I greatly apologies I didn't know there is an answer for this question
– fedora
46 mins ago
Related: unix.stackexchange.com/questions/163669/…
– Jeff Schaller
21 mins ago
and unix.stackexchange.com/q/72429/117549
– Jeff Schaller
18 mins ago