?? chapter5-22.cpp
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//文件名:CHAPTER5-22.cpp
#include <map>
#include <iostream>
using namespace std;
struct ltstr{
bool operator()(const char* s1, const char* s2) const
{
return strcmp(s1, s2) < 0;
};
};
int main()
{
multimap<const char*, int, ltstr> m;
m.insert(pair<const char* const, int>("a", 1));
m.insert(pair<const char* const, int>("c", 2));
m.insert(pair<const char* const, int>("b", 3));
m.insert(pair<const char* const, int>("b", 4));
m.insert(pair<const char* const, int>("a", 5));
m.insert(pair<const char* const, int>("b", 6));
cout << "Number of elements with key a: " << m.count("a") << endl;
cout << "Number of elements with key b: " << m.count("b") << endl;
cout << "Number of elements with key c: " << m.count("c") << endl;
cout << "Elements in m: " << endl;
for (multimap<const char*, int, ltstr>::iterator it = m.begin();it != m.end();++it)
cout << " [" << (*it).first << ", " << (*it).second << "]" << endl;
}
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