将字符（char）数据写入文本文件教程

#include <fstream>
using namespace std;

int main() {
char data[] = "Hello World!";

ofstream outfile("output.txt"); // 创建并打开输出流对象指向名为“output.txt”的文件

if(outfile.is_open()) {
outfile.write(data, strlen(data)); // 使用write函数向文件写入字符串内容及长度
cout << "Data written successfully to the file.\n";

outfile.close(); // 完成写入后关闭文件流
} else {
cerr << "Unable to open file.";
}

return 0;
}

data = '你好，世界！'

with open('output.txt', mode='w') as f:
# 在'w'模式下会清空原有文件或创建新文件进行写入
f.write(data)
print(f"Character Data Successfully Written into output.txt")

import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.IOException;

public class MainClass {
public static void main(String[] args) throws IOException {

String data = "Hola Mundo!"; // 字符串在 Java 中实际上是 Unicode 的序列，可包含任意字符

BufferedWriter writer = new BufferedWriter(new FileWriter("output.txt"));

try {
writer.append(data); // 将数据追加至缓冲区，并最终同步到底层文件系统中的文件里
System.out.println("Characters have been written to the text file.");

} finally {
writer.close();
}

}
}

const fs = require('fs');

let data = 'こんにちは、世界';

// 异步方式写入
fs.writeFile('output.txt', data, function(err){
if (err) throw err;
console.log('The character data was saved!');
});

// 或者采用 Promise 形式
(async () => {
await fs.promises.writeFile('output.txt', data);
console.log('Asynchronous write completed.');
})();