Thread: Extracting specific parts from a string

Hi,

I have a string like this:

"FROM:<[email protected]>"

I need to extract 2 parts from this string(mailbox and server) and put them in two new strings as follows:

stringa = "mail"
stringb = "server.com"

all other bits can be discarded.

I would be very gretful if anyone has some code for extracting these two bits either side of the @ symbol, please remember any email address could be in there.

Thanks
TNT

Or in C++:

Code:

std::string s = "FROM:<[email protected]>";

int ltPos = s.find('<');
int atPos = s.find('@');
int gtPos = s.find('>');

std::string user = s.substr(  ltPos+1, atPos-ltPos-1 );
std::string host = s.substr( atPos+1, gtpos-atPos-1 );

I don't have the time to test this code, but something along these lines should work.

Code:

This piece of code does what you are asking.
#include <iostream.h>
#include <conio.h>
char* stringy="FROM:<[email protected]>" ;
char string1[30];
char string2[30]; 
int slen;

int main()
	{
 		slen=strlen(stringy);
 		int fromhere=0;
 		int j=0; 
 		
 			for(int i=0;i<slen;i++)
 				{
   					string1[i-6]=stringy[i];
   						if(stringy[i]=='@')
   							{
   								slen=1; 
 							    string1[i-6]='\0';
                            }
				}
		slen=strlen(stringy);  
 			for(int i=0;i<slen;i++)
 				{ 
					if(stringy[i]=='@' )
						{
							fromhere=1;
						}	   
					if(fromhere==1)
						{
							string2[j]= stringy[i+1];
 							j++;
						}   
 				}
		string2[strlen(string2)-1]='\0'; 
  		cout<<string1<<endl;
  		cout<<string2;
 
    	getch();
     	return 0;
	}

I checked it out from curiosity and got these errors from bigwillie.

Code:

c:\compiled\extract\cpp1.cpp(11) : error C2065: 'strlen' : undeclared identifier
c:\compiled\extract\cpp1.cpp(25) : error C2374: 'i' : redefinition; multiple initialization

I don't know what they mean but thats the 2 errors I got