#include <iostream>
using namespace std;
int main()
{
    char c;
    int n;
    cout << " Please enter a letter of the Alphabet and a decimal number";
    cin >> c >> n;
    if (c == 'a'|| c== 'e'|| c== 'i'|| c== 'o'|| c== 'u'||c == 'A'|| c== 'E'|| c== 'I'|| c== 'O'|| c== 'U' )
    {
        cout << c <<  " is a vowel" << endl;
    }
    else
    {
        cout << c << " is a consonant" << endl;
    }

    float x;
    cin >> x;
        if (x<0)
            cout << x << " is less than 0";
        else if (x>0&&x<100)
            cout << x << " is in range ";
        else
            cout << x << " is out of bounds";

        return 0;
}

当输入A，41.5时，输出如下：
A是元音nan是越界的。
我希望代码能够找到这两个问题的答案，并告诉我它是否小于0，在范围内，或超出界限，还说，字母是一个元音或辅音，我该如何去做呢？