Question

I’m learning function templates in C++, so I wrote a simple function to remove duplicates. But the compiler throws following error.

removeDup is not a function or static data member

using namespace std;  
template <typename T>  
void removeDup(std::vector<T>& vec)  
{  
        std::sort(vec.begin(), vec.end());  
        vec.erase(std::unique(vec.begin(), vec.end()), vec.end());  
}  

What could be the problem?

Answer 1

This works fine for me:

#include <vector>
#include <algorithm>
#include <iostream>

using namespace std;  
template <typename T>  
void removeDup(std::vector<T>& vec)  
{  
        std::sort(vec.begin(), vec.end());  
        vec.erase(std::unique(vec.begin(), vec.end()), vec.end());  
}  

int main()
{

    int values[] = {1,2,3,3,3};
    vector<int> ints(values, values + 5);
    removeDup(ints);

    for (vector<int>::iterator it=ints.begin(); it!=ints.end(); ++it)
        cout << " " << *it;
    return 0;
}

$ g++ c.cpp
$ ./a.out
1 2 3