string find last of problem

[kaferro]

I need to find "DEL" in a string. Sometimes it will appear at the
beginning sometimes at the end. I test for its existence if pos is
greater than zero when using the string function find_last_of(). This
method worked fine until I encountered an unanticipated string value.
What is the best method to solve the problem that exists in the code
below where both find_last_of() return a positive value?

//determines if trade type is DEL
string s_transStatus="DEL";
int pos=0;
pos=s_transStatus.find_last_of("DEL");

cout << "\ns_transStatus=" << s_transStatus;
cout << "\npos=" << pos << endl;

s_transStatus="ELEC";
pos=0;
pos=s_transStatus.find_last_of("DEL");

cout << "\ns_transStatus=" << s_transStatus;
cout << "\npos=" << pos << endl;

 

[Victor Bazarov]

I need to find "DEL" in a string.

You need to find an exact substring?

Sometimes it will appear at the
beginning sometimes at the end. I test for its existence if pos is
greater than zero when using the string function find_last_of().

Wrong function, if I understand what you're trying to do. 'find_last_of'
finds the last occurrence of _any_ of the chars from { 'D', 'E', 'L' } in
your string.

This
method worked fine until I encountered an unanticipated string value.

Like what?

What is the best method to solve the problem that exists in the code
below where both find_last_of() return a positive value?

Not sure what you're asking. What exactly are you trying to accomplish
here?

//determines if trade type is DEL
string s_transStatus="DEL";
int pos=0;
pos=s_transStatus.find_last_of("DEL");

You can write it in the same line:

int pos = s_transStatus.find_last_of("DEL");

I believe you still need to simply use 'rfind' instead of 'find_last_of'.

cout << "\ns_transStatus=" << s_transStatus;
cout << "\npos=" << pos << endl;

s_transStatus="ELEC";
pos=0;
pos=s_transStatus.find_last_of("DEL");

cout << "\ns_transStatus=" << s_transStatus;
cout << "\npos=" << pos << endl;

V

 

[Sarath]

I need to find "DEL" in a string. Sometimes it will appear at the
beginning sometimes at the end. I test for its existence if pos is
greater than zero when using the string function find_last_of(). This
method worked fine until I encountered an unanticipated string value.
What is the best method to solve the problem that exists in the code
below where both find_last_of() return a positive value?

//determines if trade type is DEL
string s_transStatus="DEL";
int pos=0;
pos=s_transStatus.find_last_of("DEL");

cout << "\ns_transStatus=" << s_transStatus;
cout << "\npos=" << pos << endl;

s_transStatus="ELEC";
pos=0;
pos=s_transStatus.find_last_of("DEL");

cout << "\ns_transStatus=" << s_transStatus;
cout << "\npos=" << pos << endl;

As per the documentation, find_last_of searches through a string for
the last character that matches any element of a specified string.
Seems the program behavior is correct. I suggest you to use find or
rfind function for your purpose.

-Sarath
http://sarathc.wordpress.com/

 

[nishit.gupta]

use find for exact pattern to be searched.

As per the documentation, find_last_of searches through a string for
the last character that matches any element of a specified string.
Seems the program behavior is correct. I suggest you to use find or
rfind function for your purpose.

-Sarath
http://sarathc.wordpress.com/