remove algorithm

[rofhiwangae]

hey guys i cant seem to understand why de following code is not working::it gives me an error no matching function for call.....

#include <iostream>
#include <string>
#include <cctype>
#include <algorithm>
#include <iterator>


using namespace std;


int main()
{
    string name="this is not nyc***";
    name.erase(remove(name.begin(), name.end(),isspace), name.end());

    cout<<name.size()<<endl;

}

[Peter87]

If you want to pass a predicate function you have to use std::remove_if instead of std::remove.
http://www.cplusplus.com/reference/algorithm/remove_if/

Another problem is that there are multiple versions of isspace
http://www.cplusplus.com/reference/cctype/isspace/
http://www.cplusplus.com/reference/locale/isspace/
and the compiler doesn't know which one to pick.

To force the correct version you could use a cast

name.erase(remove_if(name.begin(), name.end(), static_cast<int(*)(int)>(isspace)), name.end());

Or you could specify the template argument types explicitly

name.erase(remove_if<string::iterator, int(*)(int)>(name.begin(), name.end(), isspace), name.end());

Or you could create another function, or use a lambda function, that calls the isspace function internally.

name.erase(remove_if(name.begin(), name.end(), [](char x){return isspace(x);}), name.end());

[rofhiwangae]

wow dats great,, only thot isalpha was of type cctype....it works thanx again