Find / Replace string in text file

[neeludhiman]

Hi All,

Can someone please help me with the code in C / C++ to find a string in an input text file and replace it with another string in output text file. The catch is that white spaces in the input file should be retained in output file. And, if possible we should be able to replace multiple search strings with multiple replace strings. e.g;
srch1, srch2, srch3 in in.txt should be replaced by rplc1, rplc2, rplc3 in out.txt

Thanks.

[sicarie]

Have you tried using getline() and strtok()?

[neeludhiman]

Hi,

I forgot to mention that I need the code for Windows platform. So I can not use sed, getline() as they are not available in Windows.

Thanks.

[sicarie]

Hi,

I forgot to mention that I need the code for Windows platform. So I can not use sed, getline() as they are not available in Windows.

Thanks.

I'm pretty sure getline is available in Windows, what headers are you including in your program?

[neeludhiman]

Solved:

while (fgets(str, 80, infile) != NULL) {
while ((srchstr = strstr (str, "my")) != NULL)
memcpy(srchstr, "yo", strlen("yo"));
while ((srchstr = strstr(str, "this")) != NULL)
memcpy(srchstr, "that", strlen("that")) ;
fputs(str, outfile);
}

[dmjpro]

Solved:

 while (fgets(str, 80, infile) != NULL) {
       while ((srchstr = strstr (str, "my")) != NULL)
           memcpy(srchstr, "yo", strlen("yo"));
       while ((srchstr = strstr(str, "this")) != NULL)
           memcpy(srchstr, "that", strlen("that"));
       fputs(str, outfile);
}
 

Please follow the guideline while you do post.

Kind regards,
Dmjpro.