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#include <unordered_map>
#include <iostream>
#include <string>
#include <cstring>
using namespace std;
struct EqualCp
{
bool operator()(char const *l, char const *r) const
{
return strcmp(l, r) == 0;
}
};
struct HashCp
{
size_t operator()(char const *str) const
{
return std::hash<std::string>()(str);
}
};
int main()
{
unordered_map<char const *, int, HashCp, EqualCp> months;
// or explicitly:
unordered_map<char const *, int, HashCp, EqualCp>
monthsTwo(61, HashCp(), EqualCp());
months["april"] = 30;
months["november"] = 31;
string apr("april"); // different pointers, same string
cout << "april -> " << months["april"] << '\n' <<
"april -> " << months[apr.c_str()] << '\n';
}
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