In win32 application if defining a variable of CString then
it gives the error "CString:Undeclared identifier" how to
solve the problem? What headerfile need to include??
3. When do you say that a digraph is acyclic
A)if and only if its first search does not have back arcs
B)a digraph is acyclic if and only if its first search does
not have back vertices
C)if and only if its first search does not have same
dfnumber
D)None of these