比较无聊，打印个九九乘法表。实现的语言有：Java (8, 10+), JavaScript, C, C++, Python (2.7, 3.7). 今天的开发环境还不齐备，後面会继续整理一些其他语言的写法：

Java 8:

public class MultiTable {

public static void main(String[] args) {

for (int i = 1; i <= 9; i++) {

for (int j = 1; j <= i; j++) {

System.out.print(j + " \u00d7 " + i + " = " + i * j);

if (j < i) {

System.out.print(", ");

}

}

System.out.println();

}

}

}

编译执行：

$ javac MultiTable.java

$ java MultiTable

Java 10+:

public class MultiTable2 {

public static void main(String[] args) {

for (var i = 1; i <= 9; i++) {

for (var j = 1; j <= i; j++) {

System.out.print(j + " \u00d7 " + i + " = " + i * j);

if (j < i) {

System.out.print(", ");

}

}

System.out.println();

}

}

}

编译执行，同上。

JavaScript (node.js):

let content = '';

for (let i = 1; i <= 9; i++) {

for (let j = 1; j <= i; j++) {

content += j + " \u00d7 " + i + " = " + i * j;

if (j < i) {

content += ", ";

}

}

content += "\n";

}

console.log(content);

编译执行：

$ node file_name.js

C:

#include

int main() {

for (int i = 1; i <= 9; i++) {

for (int j = 1; j <= i; j++) {

printf("%d × %d = %d", j, i, i * j);

if (j < i) {

printf(", ");

}

}

printf("\n");

}

}

编译执行：

$ gcc file_name.c -o file_name

$ ./file_name

C++:

#include

using namespace std;

int main() {

for (int i = 1; i <= 9; i++) {

for (int j = 1; j <= i; j++) {

cout << j << "×" << i << " = " << i * j;

if (j < i) {

cout << (", ");

}

}

cout << ("\n");

}

}

编译执行：

$ g++ file_name.c -o file_name

$ ./file_name

注意这里使用 g++ 而非 gcc

Python 2, Python 3

# coding=utf-8

from __future__ import print_function # 本行保留，代码可运行于 Python 2.7，注释掉即为 Python 3.7 版本

def print_multi_table():

for i in range(1, 10):

for j in range(1, i + 1):

print("%d x %d = %d" % (j, i, i * j), end = "")

if (j < i ):

print(", ", end = "")

print("")

return

print_multi_table()

编译执行： Python 2:

$ python file_name.py

Python 3:

$ python3 file_name.py

输出结果：

1 × 1 = 1

1 × 2 = 2, 2 × 2 = 4

1 × 3 = 3, 2 × 3 = 6, 3 × 3 = 9

1 × 4 = 4, 2 × 4 = 8, 3 × 4 = 12, 4 × 4 = 16

1 × 5 = 5, 2 × 5 = 10, 3 × 5 = 15, 4 × 5 = 20, 5 × 5 = 25

1 × 6 = 6, 2 × 6 = 12, 3 × 6 = 18, 4 × 6 = 24, 5 × 6 = 30, 6 × 6 = 36

1 × 7 = 7, 2 × 7 = 14, 3 × 7 = 21, 4 × 7 = 28, 5 × 7 = 35, 6 × 7 = 42, 7 × 7 = 49

1 × 8 = 8, 2 × 8 = 16, 3 × 8 = 24, 4 × 8 = 32, 5 × 8 = 40, 6 × 8 = 48, 7 × 8 = 56, 8 × 8 = 64

1 × 9 = 9, 2 × 9 = 18, 3 × 9 = 27, 4 × 9 = 36, 5 × 9 = 45, 6 × 9 = 54, 7 × 9 = 63, 8 × 9 = 72, 9 × 9 = 81