如何调用方法？在Java中

Question

public static void main(String args []) 
{ 
    double dimes; 
    double quaters; 

    Scanner input = new Scanner(System.in); 

    System.out.print("Enter number of Dimes:"); 
    dimes = input.nextDouble(); 

    System.out.print("Enter Number of Quaters:"); 
    quaters = input.nextDouble(); 

    double dollars= dollar_amount(dimes,quaters); 
    System.out.println("Dollar Amount total: $" + dollars); 

    public static double dollar_amount(dimes,quaters); 
    dollars= dollar_amount(dimes,quaters); 
    System.out.println("Total dollar amount: $" + dollars); 
} 

double dollar_amount(double dimes, double quaters); 
{ 
    dollars = (0.10 * dimes)+(0.25 * quaters); 
} 

return dollars; 

} 
} 
} 

我有一个关于如何调用方法的问题。我遵循了我给出的提示，但不知何故，我没有完全调用方法。

暗示：

1. 输入变暗
2. 输入季度
3. 呼叫的方法dollar_amout（硬币，四分之一）
4. 美元= dollar_amount（硬币，四分之一）
5. 端主
6. double dollar_amount（角钱，季度）
7. 美元= 0.10 X +助攻0.25×季度
8. 回报美元
9. 年底方法

Answer 1

我觉得你的方法主体是错误的

Double dollar_amount(double dimes, double quaters); 
{ 
    Double dollars = (0.10 * dimes)+(0.25 * quaters); 
    return dollars; 
} 

而且你调用它正确的地方。没有问题那

Answer 2

你在做什么是试图设置一个变量的值使用方法。您必须先正确定义方法dollar_amount(dimes,quaters)，然后才能调用它。

将此代码粘贴到您当前的代码中，并粘贴到您的主类中。

public static void main(String args []){ 
    double dimes; 
    double quaters; 

    Scanner input = new Scanner(System.in); 

    System.out.print("Enter number of Dimes:"); 
    dimes = input.nextDouble(); 

    System.out.print("Enter Number of Quaters:"); 
    quaters = input.nextDouble(); 

    double dollars= dollar_amount(dimes,quaters); 
    System.out.println("Dollar Amount total: $" + dollars); 

} 

public static double dollar_amount(dimes,quaters){ 
    dollars = (0.10 * dimes)+(0.25 * quaters); 
    return dollars; 
} 

Answer 3

你必须做一些改变，试试这个。

public static void main(String args[]) { 
    double dimes; 
    double quaters; 

    Scanner input = new Scanner(System.in); 

    System.out.print("Enter number of Dimes:"); 
    dimes = input.nextDouble(); 

    System.out.print("Enter Number of Quaters:"); 
    quaters = input.nextDouble(); 

    double dollars = dollar_amount(dimes, quaters); 
    System.out.println("Dollar Amount total: $" + dollars); 

    dollars = dollar_amount(dimes, quaters); 
    System.out.println("Total dollar amount: $" + dollars); 
} 

public static double dollar_amount(double dimes, double quaters) { 
    double dollars = (0.10 * dimes) + (0.25 * quaters); 
    return dollars; 
}