Iterators within templates

[Gaijinco]

Why this doesn't work?

1: template <typename T>
2: void imprimir(vector<T> v)
3: {
4: for(vector<T>::iterator pos=v.begin(); pos<v.end(); ++pos)
5: cout << *pos << " ";
6: cout << endl;
7: }
8:

The compiler says
Line 4 expected `;' before "pos"

I don't know what that's supposed to mean! Thanks.

 

[TB]

Gaijinco skrev:

Why this doesn't work?

1: template <typename T>
2: void imprimir(vector<T> v)
3: {
4: for(vector<T>::iterator pos=v.begin(); pos<v.end(); ++pos)

 

[John Carson]

Why this doesn't work?

1: template <typename T>
2: void imprimir(vector<T> v)
3: {
4: for(vector<T>::iterator pos=v.begin(); pos<v.end(); ++pos)
5: cout << *pos << " ";
6: cout << endl;
7: }
8:

The compiler says
Line 4 expected `;' before "pos"

I don't know what that's supposed to mean! Thanks.

Please don't include line numbers with your code. Anyone who attempts to
compile it must first manually delete the numbers.

Replace

for(vector<T>::iterator pos=v.begin(); pos<v.end(); ++pos)

with

for(typename vector<T>::iterator pos=v.begin(); pos<v.end(); ++pos)

The compiler is interpreting vector<T>::iterator as a variable name, not as
a type name. Using typename tells it to interpret it as a type.