从C++到仓颉：一个小型项目的迁移实践与深度思考

#include <iostream>
#include <fstream>
#include <vector>
#include <algorithm>
#include <numeric>

struct Student {
    std::string name;
    int score;
};

double calculateAverage(const std::vector<Student>& students) {
    if (students.empty()) return 0.0;
    int total = std::accumulate(students.begin(), students.end(), 0,
        [](int sum, const Student& s) { return sum + s.score; });
    return static_cast<double>(total) / students.size();
}

int findMaxScore(const std::vector<Student>& students) {
    if (students.empty()) return -1;
    return std::max_element(students.begin(), students.end(),
        [](const Student& a, const Student& b) { return a.score < b.score; })->score;
}

void analyzeScores(const std::vector<Student>& students) {
    if (students.empty()) {
        std::cout << "没有学生数据" << std::endl;
        return;
    }
    
    std::vector<int> scores;
    for (const auto& student : students) {
        scores.push_back(student.score);
    }
    
    std::sort(scores.begin(), scores.end());
    
    double average = calculateAverage(students);
    int maxScore = findMaxScore(students);
    int median = scores[scores.size() / 2];
    
    std::cout << "平均分: " << average << std::endl;
    std::cout << "最高分: " << maxScore << std::endl;
    std::cout << "中位数: " << median << std::endl;
}

int main() {
    std::vector<Student> students = {
        {"张三", 85},
        {"李四", 92},
        {"王五", 76},
        {"赵六", 88},
        {"钱七", 95}
    };
    
    analyzeScores(students);
    
    // 模拟从文件读取
    std::ofstream outfile("scores.txt");
    for (const auto& student : students) {
        outfile << student.name << " " << student.score << std::endl;
    }
    outfile.close();
    
    return 0;
}

import std.io.*
import std.collections.*
import std.string.*

class Student(let name: String, let score: Int) {}

func calculateAverage(students: List<Student>): Float64 {
    if students.isEmpty() {
        return 0.0
    }
    let total = students.map({ s => s.score }).reduce(0, { sum, score => sum + score })
    return Float64(total) / Float64(students.size())
}

func findMaxScore(students: List<Student>): Int {
    if students.isEmpty() {
        return -1
    }
    return students.map({ s => s.score }).max() ?? -1
}

func analyzeScores(students: List<Student>): Void {
    if students.isEmpty() {
        println("没有学生数据")
        return
    }
    
    let scores = students.map({ s => s.score }).sorted()
    let average = calculateAverage(students)
    let maxScore = findMaxScore(students)
    let median = scores[scores.size() / 2]
    
    println("平均分: ${average}")
    println("最高分: ${maxScore}") 
    println("中位数: ${median}")
}

func main(): {
    let students = [
        Student("张三", 85),
        Student("李四", 92), 
        Student("王五", 76),
        Student("赵六", 88),
        Student("钱七", 95)
    ]
    
    analyzeScores(students)
    
    // 写入文件
    let file = try File.openForWrite("scores.txt")
    for student in students {
        try file.writeLine("${student.name} ${student.score}")
    }
    file.close()
    
    return 0
}