实现Hello,World!的方式

实现Hello, world! 的方式:

 

先来几个python的

（注：使用的是python3.6版本）:

方式1：

使用python + reportlab库 生成PDF文件

from reportlab.graphics.shapes import Drawing, String
from reportlab.graphics import renderPDF

d = Drawing(860, 480)
s = String(430, 240, 'Hello, world!', textAnchor='middle')
s.fontSize = 100
d.add(s)

renderPDF.drawToFile(d, 'hello.pdf', 'A simple PDF file')

运行后得到文件 hello.pdf

打开后看到：

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方式2:

python + turtle库（turtle是很好用的1个图形库）

注：运行此程序可看到画图的过程

import turtle as t
#移动笔，而不在路径中画
def move_pen_to(t,x,y):
    t.up()
    t.goto(x,y)
    t.down()

#画H
def drawH(x,y):
    move_pen_to(t, x, y)
    t.goto(x, y-100)
    move_pen_to(t, x, y-50)
    t.goto(x+50, y-50)
    move_pen_to(t,x+50,y)
    t.goto(x+50,y-100)

#E
def drawE(x,y):
    move_pen_to(t, x, y)
    t.goto(x+50, y)
    move_pen_to(t, x, y)
    t.goto(x, y-100)
    move_pen_to(t, x, y-50)
    t.goto(x+50, y-50) 
    move_pen_to(t,x, y-100)
    t.goto(x+50, y-100) 

#画L
def drawL(x, y):
    move_pen_to(t,x,y)
    t.goto(x, y-100)
    t.goto(x+50, y-100)
 
#画O
def drawO(x, y):
    move_pen_to(t,x,y)
    t.goto(x, y-100)
    t.goto(x+50, y-100)
    t.goto(x+50, y)
    t.goto(x,y)

def drawW(x, y):
    move_pen_to(t, x, y)
    t.goto(x+(50/4),y-100)
    t.goto(x+(50/4)*2,y)
    t.goto(x+ (50/4)*3, y-100)
    t.goto(x+ (50/4)*4, y)

def drawR(x,y):
    move_pen_to(t, x, y)
    t.goto(x+50,y)
    t.goto(x+50,y-30)
    t.goto(x, y-30)
    move_pen_to(t, x, y)
    t.goto(x, y-100)
    move_pen_to(t, x, y-30)
    t.goto(x+50, y-100)

def drawD(x, y):
    move_pen_to(t, x, y)
    t.goto(x, y-100)
    t.circle(50,180)


#设置宽度和速度
t.width(5)
t.speed(2)
#起点x,y
x =-200
y = 200

drawH(x, y)
drawE(x+50+20, y)
drawL(x+50*2+20*2, y)
drawL(x+50*3+20*3, y)
drawO(x+50*4+20*4, y)

line2 = y -100-20
drawW(x, line2)
drawO(x+50+20, line2)
drawR(x+50*2+20*2, line2)
drawL(x+50*3+20*3, line2)
drawD(x+50*4+20*4, line2)

 

 

方式3：python print()

print("Hello, world")

 

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方式4:C语言 printf()

#include<stdio.h>
int main()
{
  printf("Hello, world");
  return 0;
}

方式5：C++ cout

#include<iostream>
int main()
{
  std::cout << "Hello, world";
  return 0;
}

 

方式6：C++ cout 

#include<iostream>
int main()
{
  using std::cout;
  cout<< "HH      HH\t" << "EEEEEEEEEE\t" << "LL        \t" << "LL        \t" << "OOOOOOOOOO\n"
    << "HH      HH\t" << "EE        \t" << "LL        \t" << "LL        \t" << "OO      OO\n"
    << "HH      HH\t" << "EE        \t" << "LL        \t" << "LL        \t" << "OO      OO\n"
    << "HHHHHHHHHH\t" << "EEEEEEEEEE\t" << "LL        \t" << "LL        \t" << "OO      OO\n"
    << "HH      HH\t" << "EE        \t" << "LL        \t" << "LL        \t" << "OO      OO\n"
    << "HH      HH\t" << "EE        \t" << "LL        \t" << "LL        \t" << "OO      OO\n"
    << "HH      HH\t" << "EEEEEEEEEE\t" << "LLLLLLLLLL\t" << "LLLLLLLLLL\t" << "OOOOOOOOOO\n";
  cout<< "\n\n";
  cout<< "WW  WW  WW\t" << "OOOOOOOOOO\t" << "RRRRRRRRRR\t" << "LL        \t" << "DDDDDD\n"
    << "WW  WW  WW\t" << "OO      OO\t" << "RR      RR\t" << "LL        \t" << "DD     DD\n"
    << "WW  WW  WW\t" << "OO      OO\t" << "RRRRRRRRRR\t" << "LL        \t" << "DD      DD\n"
    << "WW  WW  WW\t" << "OO      OO\t" << "R   RRR   \t" << "LL        \t" << "DD        DD\n"
    << "WW  WW  WW\t" << "OO      OO\t" << "R    RRR  \t" << "LL        \t" << "DD      DD\n"
    << "WW  WW  WW\t" << "OO      OO\t" << "R     RRR \t" << "LL        \t" << "DD     DD\n"
    << "WWWWWWWWWW\t" << "OOOOOOOOOO\t" << "R      RRR\t" << "LLLLLLLLLL\t" << "DDDDDD\n";
        
  system("pause");
  return 0;
}

 

方式7

Qt5

#include <QApplication>
#include <QLabel>

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);

    QLabel label("Hello, world");
    label.show();

    return app.exec();
}

 

 

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方式8

Java

public class hello {

  public static void main(String[] args) {
    System.out.println("Hello, world");
  }

}