Replace String

[proggybilly]

I am trying to write a small script that will replace what is in a file with new data.

i have the file opened and i can display it on the screen

int main()
{
 string line2;
 ifstream file2;
 file2.open("/etc/asterisk/rc.conf");
 if(!file2){
  printf("File rc.conf not open");
 }

 while(!file2.eof()){
 getline(file2,line2);
 cout<<line2<<endl;
 }

}

what I need to do is search the file for the instance of "EXT2IP" which actually reads as (#EXT2IP="192.168.1.1").

I need to find that instance, strip off the # (if exists) and then replace the IP address with an IP address I will pull from an array.


Your help is greatly appreciated.

 

[cpjust]

1. You use both cout and printf(). I'd stick with cout for the whole program. I believe there could be problems if you start mixing the two together.

2. To search for "EXT2IP", you can use the string::find() function:

http://www.cppreference.com/cppstring/find.html

3. To write to the file you'll need to use a ofstream file to write to (or a fstream if you want to read & write to the same file).

 

[proggybilly]

Thanks for the suggestion. I ended up using sed to do what I needed.