题解 | #单词识别#

#include <cctype>
#include <iostream>
#include <string>
#include <ctype.h>
#include <map>
using namespace std;

string& tranform(string& word)
{
    for(auto& e : word)
    {
        if(isupper(e))  e = tolower(e);
        if(e == '.')    word.pop_back();
    }
    return word;
}

int main()
{
    string word;
    map<string, int> countMap;

    while(cin >> word)
    {
        // 单词入map之前需要处理句号和单词转小写


        countMap[tranform(word)]++;
    }

    for(auto& e : countMap)
    {
        cout << e.first << ":" << e.second << endl;
    }


    return 0;
}