在 C++ 中将 Char 转换为 Int 的问题

Problems Converting Char to Int in C++

我正在努力让这款剪刀石头布游戏正常运行,但我无法通过“您已进入队列”,因为它会在那之后终止。

我的教授说我的问题是 userChoice 是 char 类型,而 randNumGenerated 是 int 类型。我尝试使用以下方法转换我的 r、p 和 s 值: 字符 r = 'a'; int a = r;

但编译器出现“重新定义:不同的基本类型”错误。我不确定该怎么做,因为将变量重新定义为 int 是我的意图。我认为这一切都错了吗?任何帮助将不胜感激!

int main()
{

    char userChoice;
    int computer;
    int randNumGenerated = 0;
    int r = 0;
    int p = 0;
    int s = 0;
    unsigned seed;



    cout << "Chose either rock, paper, or scissors" << endl;
    cout << "Let r,p,and s represent rock,paper,and scissors respectively " << endl;   

    cin >> userChoice;

    cout << "You entered: " << userChoice << endl;
    cout << " " << endl;

    seed = time(0);
    srand(seed);
    randNumGenerated = rand() % 3;

    r == 0;
    p == 1;
    s == 2;

    


    if ((userChoice == 0 && randNumGenerated == 2) || (userChoice == 1 && randNumGenerated == 0) || (userChoice == 2 && randNumGenerated == 1))
    {
        cout << "You win!";
        
    }

    if ((userChoice == 0 && randNumGenerated == 1) || (userChoice == 1 && randNumGenerated == 2) || (userChoice == 2 && randNumGenerated == 0))
    {
        cout << "You lose!";

    }

    if ((userChoice == 0 && randNumGenerated == 0) || (userChoice == 1 && randNumGenerated == 1) || (userChoice == 2 && randNumGenerated == 2))
    {
        cout << "It's a draw!";

    }



    


    return 0;

}

这三行没有效果(从字面上看,编译器应该警告你这一点):

r == 0;
p == 1;
s == 2;

您可能正在寻找类似的东西:

int userNum = -1;
switch (userChoice) {
    case 'r':
        userNum = 0;
        break;
    case 'p':
        userNum = 1;
        break;
    case 's':
        userNum = 2;
        break;
}

但是,你为什么还要使用整数呢?如果您使用字符表示,您的 if 语句将更易于阅读:

char randomChosen = "rps"[randNumGenerated];
if ((userChoice == 'r' && randomChosen == 's') || ...) {
     std::cout >> "You win!\n";
}

光是看这个就知道是剪刀石头布了。在您基于数字的代码中,我必须回顾一下转换 table.