Ich komme leider schon wieder nicht mehr weiter

error C2664: 'strftime': Konvertierung des Parameters 4 von 'std::string' in 'const tm *' nicht möglich

#include <iostream>
#include <string>
#include <time.h>
#include <algorithm>

using namespace std;

class SomeText {
public:
    virtual string getText() = 0;
    virtual ~SomeText();
};

SomeText::~SomeText()
{
}

//--------------------------------------------
// Fixer Text

class FixedText : public SomeText {
    string txt;
public:
    FixedText(string s);
    virtual string getText();
};

FixedText::FixedText(string s)
    : txt(s)
{
}

string FixedText::getText()
{
    return txt;
}
//--------------------------------------------
// Dekorator - auf Länge l auffüllen/kürzen

class FilledText : public SomeText {
    SomeText& st;
    int len;
public:
    FilledText(SomeText& t, int l);
    virtual string getText();
};

FilledText::FilledText(SomeText& t, int l)
    : st(t), len(l)
{
}

string FilledText::getText()
{
    string s = st.getText();
    int l = s.length();
    if (l >= len)
	return s.substr(0, len);
    else
	return s + string(len-l, ' ');
}
//--------------------------------------------
// Dekorator -  um N Stellen verschoben

class ShiftedText : public SomeText {
    SomeText& st;
    unsigned int offset;
public:
    ShiftedText(SomeText& t, unsigned int o);
    virtual string getText();

    void setOffset(unsigned int o);
};

ShiftedText::ShiftedText(SomeText& t, 
			 unsigned int o)
    : st(t), offset(o)
{
}

string ShiftedText::getText()
{
    string s = st.getText();
    unsigned int o = offset % s.length();
    return s.substr(offset) +  s.substr(0, o);
}

void ShiftedText::setOffset(unsigned int o)
{
    offset = o;
}
//--------------------------------------------
// Text mit aktuellem Datum und Uhrzeit

class DateText : public SomeText {
public:
    DateText();
    virtual string getText();
};

DateText::DateText()
{
}

string DateText::getText()
{
    time_t now = time(0);
    string t = ctime(&now);
    // \n am ende entfernen

    return t.substr(0, t.length()-1); 
}
//--------------------------------------------
// DekorText-Beginn
class DekorText:public SomeText
{
  string links;
  SomeText& mitte;
  string rechts;
public: 
  DekorText(const char*, SomeText&, const char*);
  virtual string getText();
};

DekorText::DekorText(const char* l, SomeText& m, const char* r)
:links(l), mitte(m), rechts(r)
{
}

string DekorText::getText()
{
  return links + mitte.getText() + rechts;
}
//--------------------------------------------
class ReverseText:public SomeText
{
  SomeText& text;
public: 
  ReverseText(SomeText&);
  virtual string getText();
};

ReverseText::ReverseText(SomeText& s)
:text(s)
{
}

string ReverseText::getText()
{
	string t = text.getText();
	reverse(t.begin(), t.end());
	return t;
}
//--------------------------------------------
// Text mit aktuellem Datum und Uhrzeit

class DateFormat : public SomeText {
public:
    DateFormat();
    virtual string getText();
};

DateFormat::DateFormat()
{
}

string DateFormat::getText()
{
	char buffer[128];
    time_t now = time(0);
    string t = ctime(&now);
	strftime(buffer,128,"Now is %I:%M%p.",*t);
	return t.substr(0, t.length()-1); 
}
//--------------------------------------------

void show(const char* what, SomeText& st, 
	  char delimiter = '\n')
{
	DekorText dt("[[" , st , "]]");
	cout << what  << ":" << dt.getText() << delimiter;
}

void show60(ShiftedText& st)
{
    for(int i=0; i < 60; i++) {
	st.setOffset(i);
	_sleep(1000); // Windows: _sleep(1000);
	show(" ", st, '\r');
	cout.flush();
    }
    cout << "\n";
}

//--------------------------------------------
int main()
{

    FixedText fix("Hello World");
    show("fix", fix);

    FilledText filled(fix, 60);
    show("filled", filled);

    ShiftedText shifted(filled, 10);
    show("shifted 10", shifted);
	ReverseText rt(shifted);
	show("reverse", rt);
    DateText dt;
	DekorText ddt("#", dt, "#");
	DateFormat df;
	//time_t rawtime;
	//struct tm * timeinfo;
	//char buffer [80];

	//time ( &rawtime );
	//timeinfo = localtime ( &rawtime );

	//strftime (buffer,80,"Now is %I:%M%p.",timeinfo);
	//puts (buffer);

	FilledText filleddate(ddt, 60);
    ShiftedText shifteddate(filleddate, 0);
    show60(shifteddate);
	system("pause");
}

lg