如果陳述不在C＃中工作

我正在使用一個教程編寫一個簡單的應用程序，計算一個銀行賬戶需要多少年才能達到目標金額。如果陳述不在C＃中工作

我試圖使用「If」語句，因此如果人的起始餘額大於其目標金額，則會打印出「您的餘額大於目標金額」，但是當我將其寫入代碼時，無論用戶輸入多少，它總是打印上面的內容。

下面的代碼：

 double balance, interestRate, targetBalance; //creating three doubles 

     Console.WriteLine("What is your current balance?"); //writing to the console 
     balance = Convert.ToDouble(Console.ReadLine()); //reading what the user inputs & converting it to a double 

     Console.WriteLine("What is your current annual interest (in %)?"); 
     interestRate = 1 + Convert.ToDouble(Console.ReadLine()); //same as above 

     Console.WriteLine("What balanec would you like to have?"); 
     targetBalance = Convert.ToDouble(Console.ReadLine()); //same as above 

     int totalYears = 0; //creates an int variable for the total years 

     do 
     { 
      balance *= interestRate; //multiplying balance x interest rate 
      ++totalYears; // adding 1 to the total years 
     } 
     while (balance < targetBalance); //only do the above when balance is less than target balance 


     if (balance < targetBalance) 
     { 
      Console.WriteLine("In {0} year{1} you'll have a balance of {2}.", totalYears, totalYears == 1 ? "" : "s", balance); //writing the results to the console 
     } 
     else if (targetBalance < balance) 
     { 
      Console.WriteLine("Your balance is bigger than the target amount"); 
     } 
     Console.ReadKey(); //leaving the results there until the user inputs a key

來源

2012-11-10 Abraham

什麼是調試器告訴你，當你通過代碼？ –

我添加了大括號，因爲有一個不必要的換行符。 –

您do-while循環退出的唯一途徑是當餘額>=目標的平衡。因此，您的第一個if聲明永遠不會評估爲true。

你可能要你輸入你的do-while循環之前做你的targetBalance < balance檢查。如果餘額大於目標，則重新開始。然後在循環之後，不需要檢查「In x年...」對話框中的if檢查。

來源

2012-11-10 00:21:24

基本上，你應該把你的'if'語句*放在循環的*裏面，以便它爲每次迭代執行。 – Jacob

非常感謝！ – Abraham

它在這裏工作得很好。但請首先檢查您的餘額，targetBalance。你沒有注意到會發生什麼如果他們是平等的。

來源

2012-11-10 00:30:46 Bekhbayar

我想你想這...

double balance, interestRate, targetBalance; //creating three doubles 

Console.WriteLine("What is your current balance?"); //writing to the console 
balance = Convert.ToDouble(Console.ReadLine()); //reading what the user inputs & converting it to a double 

Console.WriteLine("What is your current annual interest (in %)?"); 
interestRate = 1 + Convert.ToDouble(Console.ReadLine()); //same as above 

Console.WriteLine("What balanec would you like to have?"); 
targetBalance = Convert.ToDouble(Console.ReadLine()); //same as above 

int totalYears = 0; //creates an int variable for the total years 
if (balance < targetBalance) 
{ 
    do 
    { 
     balance *= interestRate; //multiplying balance x interest rate 
     ++totalYears; // adding 1 to the total years 
    } 
    while (balance < targetBalance); //only do the above when balance is less than target balance 
     Console.WriteLine("In {0} year{1} you'll have a balance of {2}.", totalYears, totalYears == 1 ? "" : "s", balance); //writing the results to the console 
    } 
} 
else if (targetBalance < balance) 
{ 
    Console.WriteLine("Your balance is bigger than the target amount"); 
} 
Console.ReadKey(); //leaving the results there until the user inputs a key

來源

2012-11-10 21:04:13

如果陳述不在C＃中工作

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