C ++中最短的程序 [英] Shortest Program in c++

问题描述

我最近遇到了可以编译的这段代码，但是运行时出现了段错误(g ++).这是topcoder的原始链接 topcoder配置文件

I came across this code recently that compiles, but runs with segmentation fault(g++). Here's the original link from topcoder topcoder profile

#include <iostream>
int main = ( std::cout << "Hello world!\n", 42  );

这也可以编译

int main=0;

有人可以解释该程序中发生了什么.使用g ++

Can someone explain what's happening in this program. Using g++

推荐答案

这都是愚蠢的游戏.这两个程序都违反了程序应包含一个称为 main 的全局函数"(3.6.1p1)的要求.这些程序可能会愚弄一些编译器，因为它们定义了符号 main ，但是该符号根本不是函数！难怪当运行时尝试使用该 main 符号作为函数时，其中至少有一个崩溃.

This is all silly games. Both programs violate the requirement "a program shall contain a global function called main" (3.6.1p1). Those programs may fool some compilers because they define a symbol main, but that symbol is not a function at all! No wonder at least one of them crashes when the runtime tries to use that main symbol as a function.

托管实现中最短的有效C ++ 03程序:

The shortest valid C++03 program in a hosted implementation:

int main(){}

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