不多说，直接上代码！
Python
代码语言：javascript复制# 变量声明
x = 10
y = 20
# 函数定义
def add(a, b):
return a b
# 条件语句
if x < y:
print("x is less than y")
else:
print("x is greater than or equal to y")
# 循环
for i in range(1, 11):
print(i)
# 类定义
class Person:
def __init__(self, name, age):
self.name = name
self.age = age
def greet(self):
print(f"Hello, my name is {self.name} and I am {self.age} years old.")
# 创建对象
person = Person("Alice", 30)
person.greet()C
代码语言：javascript复制#include <iostream>
using namespace std;
// 函数声明
int add(int a, int b) {
return a b;
}
// 类定义
class Person {
public:
string name;
int age;
Person(string n, int a) {
name = n;
age = a;
}
void greet() {
cout << "Hello, my name is " << name << " and I am " << age << " years old." << endl;
}
};
int main() {
// 变量声明
int x = 10;
int y = 20;
// 条件语句
if (x < y) {
cout << "x is less than y" << endl;
} else {
cout << "x is greater than or equal to y" << endl;
}
// 循环
for (int i = 1; i <= 10; i) {
cout << i << endl;
}
// 创建对象
Person person("Alice", 30);
person.greet();
return 0;
}C
代码语言：javascript复制#include <stdio.h>
// 函数声明
int add(int a, int b) {
return a b;
}
// 结构体定义
struct Person {
char name[50];
int age;
};
// 函数定义
void greet(struct Person p) {
printf("Hello, my name is %s and I am %d years old.n", p.name, p.age);
}
int main() {
// 变量声明
int x = 10;
int y = 20;
// 条件语句
if (x < y) {
printf("x is less than yn");
} else {
printf("x is greater than or equal to yn");
}
// 循环
for (int i = 1; i <= 10; i) {
printf("%dn", i);
}
// 创建对象
struct Person person = {"Alice", 30};
greet(person);
return 0;
}Java
代码语言：javascript复制public class Main {
// 函数声明
public static int add(int a, int b) {
return a b;
}
// 类定义
public static class Person {
String name;
int age;
Person(String name, int age) {
this.name = name;
this.age = age;
}
void greet() {
System.out.println("Hello, my name is " name " and I am " age " years old.");
}
}
public static void main(String[] args) {
// 变量声明
int x = 10;
int y = 20;
// 条件语句
if (x < y) {
System.out.println("x is less than y");
} else {
System.out.println("x is greater than or equal to y");
}
// 循环
for (int i = 1; i <= 10; i ) {
System.out.println(i);
}
// 创建对象
Person person = new Person("Alice", 30);
person.greet();
}
}C#
代码语言：javascript复制using System;
class Program {
// 函数声明
static int Add(int a, int b) {
return a b;
}
// 类定义
class Person {
public string Name;
public int Age;
public Person(string name, int age) {
Name = name;
Age = age;
}
public void Greet() {
Console.WriteLine($"Hello, my name is {Name} and I am {Age} years old.");
}
}
static void Main() {
// 变量声明
int x = 10;
int y = 20;
// 条件语句
if (x < y) {
Console.WriteLine("x is less than y");
} else {
Console.WriteLine("x is greater than or equal to y");
}
// 循环
for (int i = 1; i <= 10; i ) {
Console.WriteLine(i);
}
// 创建对象
Person person = new Person("Alice", 30);
person.Greet();
}
}JavaScript
代码语言：javascript复制// 变量声明
let x = 10;
let y = 20;
// 函数声明
function add(a, b) {
return a b;
}
// 条件语句
if (x < y) {
console.log("x is less than y");
} else {
console.log("x is greater than or equal to y");
}
// 循环
for (let i = 1; i <= 10; i ) {
console.log(i);
}
// 类定义
class Person {
constructor(name, age) {
this.name = name;
this.age = age;
}
greet() {
console.log(`Hello, my name is ${this.name} and I am ${this.age} years old.`);
}
}
// 创建对象
let person = new Person("Alice", 30);
person.greet();Go
代码语言：javascript复制package main
import "fmt"
// 函数声明
func add(a int, b int) int {
return a b
}
// 结构体定义
type Person struct {
name string
age int
}
// 方法定义
func (p Person) greet() {
fmt.Printf("Hello, my name is %s and I am %d years old.n", p.name, p.age)
}
func main() {
// 变量声明
x := 10
y := 20
// 条件语句
if x < y {
fmt.Println("x is less than y")
} else {
fmt.Println("x is greater than or equal to y")
}
// 循环
for i := 1; i <= 10; i {
fmt.Println(i)
}
// 创建对象
person := Person{"Alice", 30}
person.greet()
}SQL (using PL/pgSQL in PostgreSQL)
代码语言：javascript复制-- 函数声明
CREATE OR REPLACE FUNCTION add(a INTEGER, b INTEGER) RETURNS INTEGER AS $$
BEGIN
RETURN a b;
END;
$$ LANGUAGE plpgsql;
-- 条件语句和循环
DO $$
DECLARE
x INTEGER := 10;
y INTEGER := 20;
BEGIN
IF x < y THEN
RAISE NOTICE 'x is less than y';
ELSE
RAISE NOTICE 'x is greater than or equal to y';
END IF;
FOR i IN 1..10 LOOP
RAISE NOTICE '%', i;
END LOOP;
END $$;Rust
代码语言：javascript复制// 函数声明
fn add(a: i32, b: i32) -> i32 {
a b
}
// 结构体定义
struct Person {
name: String,
age: u32,
}
// 方法定义
impl Person {
fn greet(&self) {
println!("Hello, my name is {} and I am {} years old.", self.name, self.age);
}
}
fn main() {
// 变量声明
let x = 10;
let y = 20;
// 条件语句
if x < y {
println!("x is less than y");
} else {
println!("x is greater than or equal to y");
}
// 循环
for i in 1..=10 {
println!("{}", i);
}
// 创建对象
let person = Person {
name: String::from("Alice"),
age: 30,
};
person.greet();
}Ruby
代码语言：javascript复制# 变量声明
x = 10
y = 20
# 函数声明
def add(a, b)
a b
end
# 条件语句
if x < y
puts "x is less than y"
else
puts "x is greater than or equal to y"
end
# 循环
(1..10).each do |i|
puts i
end
# 类定义
class Person
def initialize(name, age)
@name = name
@age = age
end
def greet
puts "Hello, my name is #{@name} and I am #{@age} years old."
end
end
# 创建对象
person = Person.new("Alice", 30)
person.greetPHP
代码语言：javascript复制<?php
// 变量声明
$x = 10;
$y = 20;
// 函数声明
function add($a, $b) {
return $a $b;
}
// 条件语句
if ($x < $y) {
echo "x is less than yn";
} else {
echo "x is greater than or equal to yn";
}
// 循环
for ($i = 1; $i <= 10; $i ) {
echo $i . "n";
}
// 类定义
class Person {
public $name;
public $age;
function __construct($name, $age) {
$this->name = $name;
$this->age = $age;
}
function greet() {
echo "Hello, my name is $this->name and I am $this->age years old.n";
}
}
// 创建对象
$person = new Person("Alice", 30);
$person->greet();
?>Swift
代码语言：javascript复制// 变量声明
var x = 10
var y = 20
// 函数声明
func add(a: Int, b: Int) -> Int {
return a b
}
// 条件语句
if x < y {
print("x is less than y")
} else {
print("x is greater than or equal to y")
}
// 循环
for i in 1...10 {
print(i)
}
// 类定义
class Person {
var name: String
var age: Int
init(name: String, age: Int) {
self.name = name
self.age = age
}
func greet() {
print("Hello, my name is (name) and I am (age) years old.")
}
}
// 创建对象
let person = Person(name: "Alice", age: 30)
person.greet()Kotlin
代码语言：javascript复制// 函数声明
fun add(a: Int, b: Int): Int {
return a b
}
// 类定义
class Person(val name: String, val age: Int) {
fun greet() {
println("Hello, my name is $name and I am $age years old.")
}
}
fun main() {
// 变量声明
val x = 10
val y = 20
// 条件语句
if (x < y) {
println("x is less than y")
} else {
println("x is greater than or equal to y")
}
// 循环
for (i in 1..10) {
println(i)
}
// 创建对象
val person = Person("Alice", 30)
person.greet()
}
