如何循環用戶輸入，直到達到總和？

Question

我對Java和StackOverflow很新穎（所以我希望這個問題和答案不在此處發佈）。我正在爲自動售貨機編寫代碼，我需要創建一個循環，以便它繼續詢問用戶輸入，直到達到物品成本。我將如何去做這件事？

 System.out.println("Please enter payment of: $" + totalCost); // asking client to pay amount 
    double pay1; // this is the name given to the first value of money the client enters 
    pay1 = keyboard.nextInt(); 
     if (pay1 > totalCost) { 
     System.out.println("You entered: $" + pay1); 
     System.out.println("Change needed: $" + (pay1 - totalCost)); 
    } else { 
     System.out.println("You entered: $" + pay1); 
     System.out.println("Please enter payment of: $" + (totalCost - pay1)); 
      } 
    double pay2; // next value of money input by customer 
    pay2 = keyboard.nextInt(); 
    double totalPaid = (pay1 + pay2); 
    if (totalPaid > totalCost) { 
     System.out.println("You entered: $" + pay2); 
     System.out.println("Change needed: $" + (totalPaid - totalCost)); 
    } else { 
     System.out.println("You entered: $" + pay2); 
     System.out.println("Please enter payment of: $" + (totalCost -   totalPaid)); 
    } 
    } 
    } 

Answer 1

你能更具體嗎？僞代碼可能看起來像這樣：

while(money < desiredMoney) { 
    askForMoney(); 
}