the multimap problem

[DANNY123]

#include <iostream>
#include <map>
using namespace std;
int main()
{    multimap<string,int> mymap;
      multimap<string,int>::iterator iter;
 pair<multimap<char,int>::iterator, multimap<char,int>::iterator> par;
	mymap.insert(pair<char,int>('a',8));
	mymap.insert(pair<char,int>('b',10));
	mymap.insert(pair<char,int>('b',990));
	mymap.insert(pair<char,int>('c',69));
	mymap.insert(pair<char,int>('d',89));
	mymap.insert(pair<char,int>('d',39));
	mymap.insert(pair<char,int>('e',89));
	mymap.insert(pair<char,int>('f',1));


	cout<<"the map contains"<<endl;
	for(char ch='a';ch<='f';ch++)
	{
	cout << ch << " =>";
    par = mymap.equal_range(ch);
    for (iter=par.first; iter!=par.second; ++iter)
      cout << " " << (*iter).second;
    cout << " "<<endl;
    }
system("pause");
  return 0;
		
}

I don't know why the compiler said that:

No constructor could take the source type, or constructor overload resolution was ambiguous
1>c:\users\danny\documents\visual studio 2010\projects\mutimap\mutimap\main.cpp(23): error C2275: 'par' : illegal use of this type as an expression
1> c:\users\danny\documents\visual studio 2010\projects\mutimap\mutimap\main.cpp(7) : see declaration of 'par'
1>c:\users\danny\documents\visual studio 2010\projects\mutimap\mutimap\main.cpp(23): error C2228: left of '.first' must have class/struct/union
1>c:\users\danny\documents\visual studio 2010\projects\mutimap\mutimap\main.cpp(23): error C2275: 'par' : illegal use of this type as an expression
1> c:\users\danny\documents\visual studio 2010\projects\mutimap\mutimap\main.cpp(7) : see declaration of 'par'
1>c:\users\danny\documents\visual studio 2010\projects\mutimap\mutimap\main.cpp(23): error C2228: left of '.second' must have class/struct/union
1>c:\users\danny\documents\visual studio 2010\projects\mutimap\mutimap\main.cpp(61): error C2059: syntax error : '}'
1>c:\users\danny\documents\visual studio 2010\projects\mutimap\mutimap\main.cpp(61): error C2143: syntax error : missing ';' before '}'
1>c:\users\danny\documents\visual studio 2010\projects\mutimap\mutimap\main.cpp(61): error C2059: syntax error : '}'
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========