如何調用方法？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; 

} 
} 
} 

我有一個關於如何調用方法的問題。我遵循了我給出的提示，但不知何故，我沒有完全調用方法。

暗示：

1. 輸入變暗
2. 輸入季度
3. 呼叫的方法dollar_amout（硬幣，四分之一）
4. 美元= dollar_amount（硬幣，四分之一）
5. 端主
6. double dollar_amount（角錢，季度）
7. 美元= 0.10 X +助攻0.25×季度
8. 回報美元
9. 年底方法

Answer 1

我覺得你的方法主體是錯誤的

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

而且你調用它正確的地方。沒有問題那

Answer 2

你在做什麼是試圖設置一個變量的值使用方法。您必須先正確定義方法dollar_amount(dimes,quaters)，然後才能調用它。

將此代碼粘貼到您當前的代碼中，並粘貼到您的主類中。

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

你必須做一些改變，試試這個。

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; 
}