c++ - 为什么这个程序总是崩溃

Question

它在执行时崩溃:

#include <iostream>

int main ()

{
    if(main());
    return 0;
}

为什么？

Answer 1

它因 Stackoverflow 而崩溃当然，因为没有终止条件，但从技术上讲，C++ 编译器不允许编译它，因为在 C++ 中:

main() cannot be called from within a program.
The address of main() cannot be taken.
The main() function cannot be overloaded.

标准内容:

C 兼容性附件

3.6

Change: Main cannot be called recursively and cannot have its address taken
Rationale: The main function may require special actions.
Effect on original feature: Deletion of semantically well-defined feature
Difficulty of converting: Trivial: create an intermediary function such as mymain(argc, argv).
How widely used: Seldom