其实有固定代码，如下：
#include<iostream>//万能开头
using namespace std;
int main()
{
    cout<<"hello world";
    return 0;
}
//一手交赞，一手交货（代码）





//核桃hetao1609095编程
//水印

P0000 在线编程区

完整代码

#include <iostream>//hetao3097453
using namespace std;
int main()
{
    cout << "hello world";
    return 0;
}

hetao3097453

2024年5月12日

#include <bits/stdc++.h>
using namespace std;
signed main()
{
    cout << "hello world";
    return 0;
}

跟P00001很像

#include <iostream>
using namespace std;
int main()
{
	cout << "hello world";
	return 0;
}

压缩一下:

#include <iostream>
using namespace std;int main(){cout << "hello world";return 0;}

最简代码 `

#include<iostream> 
using namespace std;int main(){cout<<"hello world";}

P0000题解

不知题目真面目，只缘身在此题中

题解如下

#include <iostream>
using namespace std;
int main()
{
    cout << "hello world";
    return 0;
}

#include<iostream> using namespace std; int main() { cout << "hello world"; return 0; }

#include<iostream>
using namespace std;
int main()
{
    cout << "hello world";
    return 0;
}

#include<iostream>
using namespace std;
int main()
{
    cout<<"hello world";
    return 0;
}

一个极其坑人的题，而且竟然

Wrong Answer   0   读取到 hi，应为 hello

于是你输出了hello，就变成了

Wrong Answer   0   1c1 < hello --- > hello world

正确解法（先摆上框架）

#include <bits/stdc++.h> //万能头文件
using namespace std;
int main()
{
    //问题是中间输出什么
    return 0;
}

这里你可以尝试多种输出方式，例如

cout<<"hello world";
printf("hello world");

（想写快写的站起来，你觉得有必要吗）

来一个奇怪一些的

#include<iostream>
using namespace std;
#define ___________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ cout
#define __________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ return
#define _________________________________________________________________________________________________________________________________ int
_________________________________________________________________________________________________________________________________ main()
{
    ___________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________<<"hello world";
    __________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ 0;
}

这道题很坑啊,我以为是进入在线编程区就行,结果等半天也没效果 最后发现是写一个hello world代码……下面是核心代码

cout << "hello world" << endl;

#include <iostream> using namespace std; int main() { cout << "hello world"; return 0; }

#define a using namespace std;
#define b int main(){cout<<"hello world";return 0;}
#define c <iostream>
#include c
a
b

题目都不讲清楚

#include <bits/stdc++.h>
#define int long long
using namespace std;
signed main()
{
	cout<<"hello world";
	return 0;
}

#include <bits/stdc++.h> 
using namespace std;
#define ll unsigned long long
int main(){
    cout<<"hello world";
    return 0;
}

#include <cstdio>
int main(){
    printf("hello world");
}

#include <iostream> using namespace std; int main() { cout << "hello world"; return 0; }

; hello_world.asm
  BITS 64
  org 0x400000

  ehdr:           ; Elf64_Ehdr
    db 0x7f, "ELF", 2, 1, 1, 0 ; e_ident
    times 8 db 0
    dw  2         ; e_type
    dw  0x3e      ; e_machine
    dd  1         ; e_version
    dq  _start    ; e_entry
    dq  phdr - $$ ; e_phoff
    dq  0         ; e_shoff
    dd  0         ; e_flags
    dw  ehdrsize  ; e_ehsize
    dw  phdrsize  ; e_phentsize
  phdr:           ; Elf64_Phdr
    dd  1         ; e_phnum      ; p_type
	              ; e_shentsize
    dd  5         ; e_shnum      ; p_flags
	              ; e_shstrndx
  ehdrsize  equ  $ - ehdr
    dq  0         ; p_offset
    dq  $$        ; p_vaddr
    dq  $$        ; p_paddr
    dq  filesize  ; p_filesz
    dq  filesize  ; p_memsz
    dq  0x1000    ; p_align
  phdrsize  equ  $ - phdr
  
  _start:
    ; write "Hello World!" to stdout
	  mov al, 1
    mov dl, 13
    mov esi, hello
    syscall
    mov al, 231
    syscall

  hello: db "Hello World!", 10 ; 10 is the ASCII code for newline

  filesize  equ  $ - $$

ps:网上复制的最小halloworld代码(140byte)

极其的坑，~一最开始没给要求以为是随便编一个代码，结果2次WA（悲一~

#include <bits/stdc++.h>
using namespace std;
int main()
{
    cout << "hello world";
    return 0;
}