a question about standard algorithm

[greghua]

#include <iostream>
#include <string>
#include <functional>

using namespace std;

int count(const string& s, char c)
{
	string::iterator i=find(s.begin(),s.end(),c);
	int n=0;
	while(i!=s.end())
	{
		++n;
		i=find(i+1,s.end(),c);
	}
	return n;
}

void main()
{
	cout<<cout("Abcdiadcsa",'a')<<endl;
}

when compile, compiler says that find is an undeclared identifier.
find is a standard algorithm, should i include any other head file?

[Paul McKenzie]

#include <algorithm>

Regards,

Paul McKenzie

[Philip Nicoletti]

Also, there is a std::count() algorithm

[gstercken]

And you have a typo in your code:

cout<<cout("Abcdiadcsa",'a')<<endl;

[wien]

Furthermore find will return a std::string::const_iterator since you are searching in a const string. You will need to catch it as such since you can't construct an iterator from a const_iterator (the other way around is okay).

[Andreas Masur]

And finally...

• It is

  int main

• You would rather use the member function 'find' instead of the algorithm (despite that 'count()' would be the better algorithm here).