Question

Declared a map early on:

map<char*,char*>    rtable; // used to store routing information

Now I’m attempting to display the contents of the map:

void Routes::viewroutes(){
    typedef map<char*, char*>::const_iterator iter;
    for (iter=rtable.begin(); iter != rtable.end(); ++iter) {
        cout << iter->second << " " << iter->first << endl;
    }
}

Receiving the error “expected primary-expression before ‘!=’ token and for ‘->’ token. Can’t seem to understand the error I’m making here. Any ideas?

Answer 1

iter is a type in your code. Should be a variable.

typedef map<char*,char*> my_map_t;  // alias for a specialized map

// declare a variable of needed type
my_map_t    rtable;

// declare iter of type my_map_t::const_iterator
for (my_map_t::const_iterator iter=rtable.begin(); iter != rtable.end(); ++iter) {
    cout << iter->second << " " << iter->first << endl;
}
// scope of the iter variable will be limited to the loop above