我知道函数定义中的最小参数个数为零，但是函数定义中的最大参数个数是多少？我只是为了知识和好奇而问这个问题，而不是我要编写一个真正的函数。

最佳答案

是的，实现有限制。您的答案在以下 C++ 标准摘录中的粗体文本中给出。

1。 C++语言

附件 B - 实现数量

1. Because computers are finite, C + + implementations are inevitably limited in the size of the programs they can successfully process. Every implementation shall document those limitations where known. This documentation may cite fixed limits where they exist, say how to compute variable limits as a function of available resources, or say that fixed limits do not exist or are unknown.

2. The limits may constrain quantities that include those described below or others. The bracketed number following each quantity is recommended as the minimum for that quantity. However, these quantities are only guidelines and do not determine compliance.
   — Nesting levels of compound statements, iteration control structures, and selection control structures [256].
   — Nesting levels of conditional inclusion [256].
   — Pointer, array, and function declarators (in any combination) modifying an arithmetic, structure, union, or incomplete type in a declaration [256].
   — Nesting levels of parenthesized expressions within a full expression [256].
   — Number of characters in an internal identifier or macro name [1 024].
   — Number of characters in an external identifier [1 024].
   — External identifiers in one translation unit [65 536].
   — Identifiers with block scope declared in one block [1 024].
   — Macro identifiers simultaneously defined in one translation unit [65 536].
   — Parameters in one function definition [256].
   — Arguments in one function call [256].
   — Parameters in one macro definition [256].
   — Arguments in one macro invocation [256].
   — Characters in one logical source line [65 536].
   — Characters in a character string literal or wide string literal (after concatenation) [65 536].
   — Size of an object [262 144].
   — Nesting levels for #include files [256].
   — Case labels for a switch statement (excluding those for any nested switch statements) [16 384].
   — Data members in a single class, structure, or union [16 384].
   — Enumeration constants in a single enumeration [4 096].
   — Levels of nested class, structure, or union definitions in a single struct-declaration-list [256].
   — Functions registered by atexit()[32].
   — Direct and indirect base classes [16 384].
   — Direct base classes for a single class [1024].
   — Members declared in a single class [4 096].
   — Final overriding virtual functions in a class, accessible or not [16 384].
   — Direct and indirect virtual bases of a class [1 024].
   — Static members of a class [1 024].
   — Friend declarations in a class [4 096].
   — Access control declarations in a class [4 096].
   — Member initializers in a constructor definition [6 144].
   — Scope qualifications of one identifier [256].
   — Nested external specifications [1 024].
   — Template arguments in a template declaration [1 024].
   — Recursively nested template instantiations [17].
   — Handlers per try block [256].
   — Throw specifications on a single function declaration [256].

另外，它还写着 $18.3/6，

Implementation Limits: The implementation shall support the registration of at least 32 functions.

关于c++ - 函数声明中的最大参数个数，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/4582012/