unordered_multimap_name.key_eq()(args1, args2)

// CPP program to illustrate the
// unordered_multimap::key_eq() function
  
#include <iostream>
#include <string>
#include <unordered_map>
  
using namespace std;
  
int main()
{
  
    unordered_multimap<string, string> sample;
  
    bool answer = sample.key_eq()("GEEKS", "geeks");
  
    // checks if both are same
    if (answer)
        cout << "GEEKS和geeks在容器中被视为相同\n";
    else
        cout << "GEEKS和geeks在容器中被视为不同\n";
  
    return 0;
}

GEEKS和geeks在容器中被视为不同

// CPP program to illustrate the
// unordered_multimap::key_eq() function
  
#include <iostream>
#include <string>
#include <unordered_map>
  
using namespace std;
  
int main()
{
  
    unordered_multimap<int, int> sample;
  
    bool answer = sample.key_eq()(100, 200);
  
    // check
    if (answer)
        cout << "100和200在容器中被视为相同\n";
    else
        cout << "100和200在容器中被视为不同\n";
  
    answer = sample.key_eq()(100, 100);
    if (answer)
        cout << "100和100在容器中被视为相同\n";
    else
        cout << "100和100在容器中被视为不同\n";
  
    return 0;
}

100和200在容器中被视为不同
100和100在容器中被视为相同