c++ - Adding Chars to a Stringstream -

i trying add numbers char array stringstream object. code is:

char[50] buffer = '<15>'; stringstream str; int page;  str << buffer[1]+buffer[2]; str >> page; 

page should hold integer value of 15, instead holds value 102. idea wrong code?

change

str << buffer[1]+buffer[2]; 

to

str << buffer[1] << buffer[2]; 

the way code written, add characters '1' , '5', equal 49 , 53 respectively, 102 , output stream.