map是經(jīng)常使用的數(shù)據(jù)結(jié)構(gòu)，erase可以刪除map中的鍵值對(duì)。

可以通過以下幾種方式使用erase

1.通過迭代器進(jìn)行刪除

#include <iostream>
#include <map>
#include <string>
using namespace std;void pMap(const string& w, const auto& m)
{cout<<w<<endl;for(auto& [key, value] : m){cout<<key<<" = "<<value<<endl;}cout<<endl;
}int main() {map<string, string> m = {{"father", "ming"}, {"mother", "hong"}, {"boy", "xiaoxiao"}};pMap("init data", m);auto f = m.find("father");if(f != m.end()){m.erase(f);}pMap("after erase", m);return 0;
}

運(yùn)行程序輸出：

init data

boy = xiaoxiao

father = ming

mother = hong

after erase

boy = xiaoxiao

mo