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Minimal Hello World C++

创建于：2025年1月3日

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问题

What's the Absolute shortest and simplest C++ Hello world code you can do?

思考

Crafting the shortest code

I’m identifying the shortest C++ Hello World code. The options range from using puts("Hello World") to #include <iostream> main() { std::cout << "Hello World"; } with minimal whitespace.

Streamlining the code

Considering removing the return type from main for shorter code, but it's not universally recommended. Modern standards prefer including #include <iostream> and defining int main().

Considering alternatives

I'm examining shorter code options, like main(){puts("Hello World");} or using printf with #include <cstdio>. These might compile with some warnings on g++ compilers.

Crafting a succinct C++ Hello World

I'm working through main(){std::cout<<"Hello World";} as the shortest C++ code with #include <iostream>, though it's not entirely standard-compliant.

Evaluating options

I’m gathering insights on main(){std::cout<<"Hello World";} for a concise C++ Hello World. It hones in on using #include <iostream> for standard compliance, despite some compiler variations.

Thought about shortest C++ Hello World per 15 secondi

回答

A common ultra-minimal version (which may compile on many compilers but isn’t strictly standard) is:

cpp
#include<iostream> 
main(){std::cout<<"Hello World";}

This omits an explicit int return type and drops return 0;, relying on compiler defaults. If you want to stick to fully standard-compliant C++, the shortest typical form is:

cpp
#include <iostream>
int main() {
    std::cout << "Hello World";
}

Either way, these are about as short and simple as it gets for a “Hello World” in C++.

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