String Manipulation doubt

[noopathan]

I have two strings as below

string A = "102030405060.wldep.1251.jpg";
string B= "102030405060.wldep.1251.pdf";

I want the word after last dot in other two strings
i.e;
string C = "jpg";
string D="pdf";

Early code help is greatly appreciated.

regards

Jango

 

[Ben Pope]

I have two strings as below

string A = "102030405060.wldep.1251.jpg";
string B= "102030405060.wldep.1251.pdf";

I want the word after last dot in other two strings
i.e;
string C = "jpg";
string D="pdf";

Try

std::find_last_of

Ben Pope

 

[=?iso-8859-1?q?Stephan_Br=F6nnimann?=]

I have two strings as below

string A = "102030405060.wldep.1251.jpg";
string B= "102030405060.wldep.1251.pdf";

I want the word after last dot in other two strings
i.e;
string C = "jpg";
string D="pdf";

Early code help is greatly appreciated.

regards

Jango

Use std::string::rfind.

Regards, Stephan

 

[Daniel T.]

I have two strings as below

string A = "102030405060.wldep.1251.jpg";
string B= "102030405060.wldep.1251.pdf";

I want the word after last dot in other two strings
i.e;
string C = "jpg";
string D="pdf";

Early code help is greatly appreciated.

regards

Jango

assert( A.rfind('.') != string::npos );
string C = A.substr( A.rfind('.') + 1 );

 

[Jim Langston]

assert( A.rfind('.') != string::npos );
string C = A.substr( A.rfind('.') + 1 );

Don't use assert for something like this you want to put into production.
Once you turn off debug mode asserts disappear. So it would totally ignore
that. I would rather do:

std::string C;
if ( A.rfind('.') != string::npos )
C = A.substr( A.rfind('.') + 1 );

That'll work in production or debug. Yes, it assigns a null string and
doesn't bring up an error box, but you can MessageBox if you want manually.

 

[Daniel T.]

Don't use assert for something like this you want to put into production.
Once you turn off debug mode asserts disappear. So it would totally ignore
that. I would rather do:

std::string C;
if ( A.rfind('.') != string::npos )
C = A.substr( A.rfind('.') + 1 );

That'll work in production or debug. Yes, it assigns a null string and
doesn't bring up an error box, but you can MessageBox if you want manually.

It all depends on what you want to accomplish. Your solution is good if
the program should expect to occasionally get a string without a '.' in
it (for example if the user is entering the string.)