Perhaps, if you look at line number 32 in your source file
Error 1 error C2039: 'c' : is not a member of 'std::basic_string<_Elem,_Traits,_Ax>' c:\users\sama\documents\visual studio 2010\projects\11\11\11.cpp 32
The number at the end is the line number.
In VS, you can go to a specific line number by pressing CTRL+G.
Since you don't appear to have shown us the line with the error, it is going to be up to you, but I suspect a spelling error!