C++ 如何在rand（）函数中使用枚举值

如何使用生成随机枚举变量的rand函数？这就是我目前所拥有的（它吐出了垃圾数字）：

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严格来说，可能是不可能的。 你可以

检查哪些值具有整数形式的枚举

然后您将能够生成一个整数

对它做一个模运算（%）

parse to enum[编辑-不必在C++中将其解析为enum]

例如

#包括
#包括
使用名称空间std；
int main（）
{
枚举游戏{旗帜，炸弹，元帅，将军，上校，少校，
上尉，中尉，少校，间谍}；
int maxEnumValue=12；
int randpoice=rand（）%maxEnumValue；
cout您可以使用
rand（）%12
，这将在0-11范围内创建一个随机数：

int rand_piece = gamePieces[rand() % 12];


代码中有更多错误-请尝试以下操作：

#include <stdlib.h>

const int numPieces = 11;

enum pieces { FLAG = 'F', BOMB = 'B', MARSHAL = '1', GENERAL = '2', COLONEL = 
              '3', MAJOR = '4', CAPTAIN = '5', LIEUTENANT = '6', SERGEANT = 
              '7', MINER = '8', SPY = 'S' };

int gamePieces[numPieces] = { FLAG, BOMB, MARSHAL, GENERAL, COLONEL, MAJOR, 
                       CAPTAIN, LIEUTENANT, SERGEANT, MINER, SPY };

int rand_piece = gamePieces[rand() % numPieces];

尝试：

请尝试
gamePieces[rand（）%12]
您的代码充满了错误。错误的SEGEANT，MINOR，rand_piece中缺少结束括号，枚举数为11，而大小声明为12。以下是我由此得到的错误：------------------------------------------ex.cpp:88:44:错误：从“int*”到“int”的转换无效[-fpermissive]int rand_piece=gamePieces[rand（）%12]；@Gbrandonconner您的代码中还有一些错误。请参阅更新的答案。
int rand_piece = gamePieces[rand() % 12];

#include <stdlib.h>

const int numPieces = 11;

enum pieces { FLAG = 'F', BOMB = 'B', MARSHAL = '1', GENERAL = '2', COLONEL = 
              '3', MAJOR = '4', CAPTAIN = '5', LIEUTENANT = '6', SERGEANT = 
              '7', MINER = '8', SPY = 'S' };

int gamePieces[numPieces] = { FLAG, BOMB, MARSHAL, GENERAL, COLONEL, MAJOR, 
                       CAPTAIN, LIEUTENANT, SERGEANT, MINER, SPY };

int rand_piece = gamePieces[rand() % numPieces];

enum pieces { FLAG, BOMB, MARSHAL, GENERAL, COLONEL, MAJOR, 
              CAPTAIN, LIEUTENANT, SERGEANT, MINER, SPY,
              MAX_PIECE };

int rand_piece = rand() % MAX_PIECE;

int main()
{
    enum pieces {
        FLAG = 'F', BOMB = 'B', MARSHAL = '1', GENERAL = '2', COLONEL =
        '3', MAJOR = '4', CAPTAIN = '5', LIEUTENANT = '6', SERGEANT =
        '7', MINER = '8', SPY = 'S'
    };

    int gamePieces[11] = { FLAG, BOMB, MARSHAL, GENERAL, COLONEL, MAJOR,
        CAPTAIN, LIEUTENANT, SERGEANT, MAJOR, SPY };


    std::cout << char(gamePieces[rand() % 11]) << std::endl;
    std::cout << char(gamePieces[rand() % 11]) << std::endl;
    std::cout << char(gamePieces[rand() % 11]) << std::endl;
    std::cout << char(gamePieces[rand() % 11]) << std::endl;
    std::cout << char(gamePieces[rand() % 11]) << std::endl;

    return 0;
}

7
4
4
B
6