reLeetCode 热题 100-2 字母异位词分组 扩展

1 字符排序

#include <iostream>
#include <algorithm> // for std::sort
#include <string>

int main() {
    std::string str = "programming";
    
    // 对字符串中的字符进行排序
    std::sort(str.begin(), str.end());
    
    std::cout << "排序后的字符串: " << str << std::endl;
    // 输出: aggimmnoprr
    
    return 0;
}

　　

2 学生成绩系统 multimap

 

#include <iostream>
#include <map>
#include <vector>
#include <string>

int main() {
    std::multimap<std::string, std::pair<std::string, int>> studentRecords;
    
    // 添加学生记录（班级，{姓名，分数}）
    studentRecords.insert({"ClassA", {"Alice", 85}});
    studentRecords.insert({"ClassB", {"Bob", 90}});
    studentRecords.insert({"ClassA", {"Charlie", 78}});
    studentRecords.insert({"ClassA", {"David", 92}});
    
    // 查询ClassA的所有学生
    std::cout << "Students in ClassA:" << std::endl;
    auto range = studentRecords.equal_range("ClassA");
    for (auto it = range.first; it != range.second; ++it) {
        std::cout << it->second.first << ": " << it->second.second << std::endl;
    }
    
    return 0;
}