c++如何巧妙变为c，青高收捷达

Question

#include<iostream>
#include<map>
#include<string>
#include<cctype>
#include<vector>
#include<algorithm>
typedef std::pair<std::string, int> WordStat;
typedef std::map<std::string, int>::iterator WordIterator;
bool cmpfunc(const WordStat& l, const WordStat& r) {
    return l.second == r.second ? l.first < r.first : l.second > r.second;
}
int main()
{
    int testNum;
    std::cin >> testNum;
    while (testNum--)
    {
        int lineNum;
        std::cin >> lineNum;
        std::cin.ignore();
        std::string line;
        std::map<std::string, int> wordMap;
        while (lineNum--)
        {
            std::getline(std::cin, line);
 
            std::string word = "";
            bool lastCharIsAlpha = 0;
            int i = 0;
            while (i < line.size())
            {
                while (i < line.size() && !isalpha(line[i]))++i;
                
                word = "";
                while (i < line.size() && isalpha(line[i]))
                {
                    word += line[i];
                    ++i;
                }
                if (!word.empty())
                {
                    wordMap[word]++;
                }
            }
        }
        std::vector<WordStat>words;
        for (WordIterator iter = wordMap.begin(), iterEnd = wordMap.end(); iter != iterEnd; ++iter)
        {
            words.push_back(std::make_pair(iter->first, iter->second));
        }
        std::sort(words.begin(), words.end(), cmpfunc);
        for (int i = 0; i < words.size(); ++i)
        {
            std::cout << words[i].first << " " << words[i].second << std::endl;
        }
    }
    return 0;
}

Answer 1

供参考：

#include <string.h>
#include <stdio.h>
char str[200] = { 0 };
int  strC[200] = { 0 };
char tags[200][20] = {0};
int main()
{
    int i = 0, k = 0, flg, t, T, line;
    char tmp[20];
    scanf("%d", &T);
    getchar();
    while (T--) {
        scanf("%d", &line);
        getchar();  
        i = 0; 
        memset(strC, 0, sizeof(int) * 200); 
        memset(tags, 0, sizeof(char) * 200 * 20);
        while (line--) {
            gets(str);
            char* p = strtok(str, " ,.\'\"\""); 
            while (p != NULL) {
                t = sscanf(p, "%[a-zA-Z]", tmp);
                if (t == 1) {
                    for (k = 0, flg = 1; flg && k < i; k++) {
                        if (strcmp(tags[k], tmp) == 0) {
                            strC[k]++;
                            flg = 0;
                        }
                    }
                    if (flg) {
                        strC[i]++;
                        strcpy(tags[i++], tmp);
                    }
                }
                p = strtok(NULL, " ,.\'\"\"");
            }
        }
        for (flg = 0; flg < i - 1; flg++) {
            for (k = 0; k < i - 1 - flg; k++) {
                if (strC[k] < strC[k + 1]) {
                    strcpy(tmp, tags[k]); 
                    strcpy(tags[k], tags[k + 1]);
                    strcpy(tags[k + 1], tmp);
                    t = strC[k]; strC[k] = strC[k + 1]; strC[k + 1] = t;
                }
                else if (strC[k] == strC[k + 1] && strcmp(tags[k], tags[k + 1]) > 0) {
                    strcpy(tmp, tags[k]); 
                    strcpy(tags[k], tags[k + 1]);
                    strcpy(tags[k + 1], tmp);
                    t = strC[k]; strC[k] = strC[k + 1]; strC[k + 1] = t;
                }
            }
        }
        for (k = 0; k < i; k++)
            printf("%s %d\n", tags[k], strC[k]);
    }
    return 0;
}