stl - Comparing two multimap objects in c++ -

i need compare 2 multimap objects find out whether equal or not

i know using std::equal can compare 2 vector object equality possible use algorithm comparing multimap objects?

typedef std::multimap<std::string, std::string> headermap; headermap _map,_secmap;   _map.insert(headermap::value_type("a", "a")); _map.insert(headermap::value_type("b", "b"));  _secmap.insert(headermap::value_type("a", "a")); _secmap.insert(headermap::value_type("b", "b"));    **std::equal(_map.begin(),_map.end(),_secmap.begin()); // true?** 

if above code snippet not true, how can compare 2 multimap objects?(i don't ant iterate objects , compare keys , values 1 one) thanks

you can compare them operator==:

map_ == secmap_; 

this internally compare elements 1 one until first unequal 1 found. there no way of avoiding that. here working example:

#include <map> #include <string> #include <iostream>  int main() {   typedef std::multimap<std::string, std::string> headermap;    headermap m1, m2, m3;    m1.insert(headermap::value_type("a", "a"));   m1.insert(headermap::value_type("b", "b"));    m2.insert(headermap::value_type("a", "a"));   m2.insert(headermap::value_type("b", "b"));    m3.insert(headermap::value_type("a", "a"));   m3.insert(headermap::value_type("b", "b"));   m3.insert(headermap::value_type("c", "c"));     std::cout << std::boolalpha;   std::cout << (m1==m2) << " " << (m1==m3) << std::endl;     } 

output:

true false

bear in mind names leading underscores reserved implementation should not use them.