Question

我有一个简单的程序，它使用方法来查找变量A，B，C和D中最大的变量和变量。只是为了探索，有没有办法将代码写入方法中以返回“A”，“B”等，而不仅仅是值？

public class methods
{
    public static void main (String[] args)
    {
        int A=1, B=10, C=-5, D=20;
        System.out.println("The largest of A and B is " + Largest(A,B));
        System.out.println("The largest of A, B and C is " + Largest(A,B,C));
        System.out.println("The largest of A, B, C and D is " + Largest(A,B,C,D));
        System.out.println("The product of A and B is " + Product(A,B));
        System.out.println("The product of A, B and C is " + Product(A,B,C));
        System.out.println("The product of A, B, C and D is " + Product(A,B,C,D));
    }

    public static double Largest(int A, int B)
    {
        if (A > B)
        return A;
        else
        return B;
    }

    public static double Largest(int A, int B, int C)
    {
        if (A > B && A > C)
        return A;
        else if (B > A && B > C)
        return B;
        else
        return C;
    }

    public static double Largest(int A, int B, int C, int D)
    {
        if (A > B && A>C && A>D)
        return A;
        else if (B > A && B>C && B>D)
        return B;
        else if (C > B && C>A && C>D)
        return C;
        else
        return D;
    }

    public static double Product(int A, int B)
    {
        return A*B;
    }

    public static double Product(int A, int B, int C)
    {
        return A*B*C;
    }

    public static double Product (int A, int B, int C, int D)
    {
        return A*B*C*D;
    }

}

Answer 1

为方法使用char返回类型而不是double。您还有一些应该修复的格式问题。你的方法标识符Largest（）应该是最大的（），小写＆＃34; l＆＃34;。大写字母保留给类名和构造函数。您的变量A，B，C，D也应该是小写的。全部大写的变量只能用于最终变量。例如，

final int MAX = 100;

Answer 2

最好使用这个逻辑来找出三个中最大的

 public static double Largest(int A, int B, int C) // complexity of program is getting reduced just by minimizing the comparison.
    {
        if (A > B){   //a is greater than B
           if(A>C)         
            return A;  //return a if A is largest among three
           else
              return B  // return B if B is largest among three
         }else{        
           if(B>C)      //this statement will execute if B>A.
              return B;  //return B if B is largest amoung three.
           else
              return C;  // return C if C is largest among three.
         }     
    }

Java：返回char而不是Method中的double

2 个答案: