如何在C ++中使用函数函数 [英] How can I use function in function in C++

问题描述

#include <iostream>
#include <string>
using namespace std;


void play();
void startgame();

int main()
{
    string wantToPlay;
    int counts[]={0,0,0};
	int timesPlayed;
	int userScore;
	int compScore;
      {
          play();
      }

      void startgame()
       {
          cout >>"Want to play ? Y or N";
          cin <<wantToPlay;
          while(wantToPlay=="Y"||wantToPlay=="y")
		{
		play();
		}
      }
      void play()
		{

		int userChoice=0;
		int userFav=-1;
		int moves[]={1,2,0};

      cout <<"Your Move ?"<<endl;
      cout <<"0 : Stone"<<endl;
      cout <<"1 : Paper"<<endl;
      cout <<"2 : Scissor"<<endl;
		cin >>userChoice;
		counts[userChoice]++;

	int compChoice = 0;
	int max = -1;
	if (timesPlayed == 0)
	{
		compChoice = static_cast<int>(std::floor(Math::random() * 3));
	}
	else
	{
		for (int i = 0;i < counts.size();i++)
		{
			if (counts[i] > max)
			{
				max = counts[i];
				userFav = i;
			}
		}

		compChoice = moves[userFav];
	}
std::wcout << std::wstring(L"Computer's Move : ") << compChoice << std::endl;
	int result = userChoice - compChoice;
	if (result == 1 || result == -2)
	{
		userScore++;
		std::wcout << std::wstring(L"You Win") << std::endl;
	}
	else if (result == 0)
	{
		std::wcout << std::wstring(L"Game Tied") << std::endl;
	}
	else
	{
		compScore++;
		std::wcout << std::wstring(L"You Lose") << std::endl;
	}

	std::wcout << std::wstring(L"You ") << userScore << std::wstring(L" - ") << compScore << std::wstring(L" Computer") << std::endl;
	timesPlayed = 1;
	startGame();

}
}

我的尝试： < br $>


错误：在'{'令牌之前不允许使用函数定义//这是我正在犯的错误

What I have tried:

error: a function-definition is not allowed here before '{' token //THIS IS THE ERROR I AM GETTING

推荐答案

Quote：

错误：在'{'token

error: a function-definition is not allowed here before '{' token

C ++不允许在另一个函数中定义函数。



以下是语言作者对C和C ++参考书的链接。注意，C是C ++的祖先，所以知道C对C ++总是有用。

C编程语言 - 维基百科，免费的百科全书 [ ^ ]

https://hassanolity.files.wordpress.com/2013/11/the_c_programming_language_2。 pdf [ ^ ]

http：//www.ime.usp。 br / ~pf / Kernighan-Ritchie / C-Programming-Ebook.pdf [ ^ ]



C ++编程语言 [ ^ ]

C++ do not allow to define a function inside another function.

Here is links to references books on C and C++ by the authors of the languages. Note than C is the ancestor of C++, so knowing C is always useful with C++.
The C Programming Language - Wikipedia, the free encyclopedia[^]
https://hassanolity.files.wordpress.com/2013/11/the_c_programming_language_2.pdf[^]
http://www.ime.usp.br/~pf/Kernighan-Ritchie/C-Programming-Ebook.pdf[^]

C++ Programing Language[^]

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