我試圖對涉及變量的公式進行簡單的數學計算。但是,編譯器會彈出錯誤提示變量類型不匹配。我曾嘗試鑄造和更改變量類型,但它們不起作用。如何解決這個問題而不破壞我的代碼的基本格式。Java中的Casting或變量類型錯誤
我對Java沒有經驗,所以任何指針都會有所幫助。
這是代碼。這是一個錢轉換程序。錯誤在代碼的第二部分,其他部分。
import java.util.Scanner;
public class MConvert
{
public static void main (String[] args)
{
int penny, nickel, dime, quarter, halfDollar, dollar, fiveDollar, tenDollar, twentyDollar, fiftyDollar, hundredDollar;
//can sub $ sign for dollar in variable, convention otherwise
double totalMoney;
Scanner scan = new Scanner (System.in);
System.out.println ("Are you converting to the total? If so, type true. \nIf you are converting from the total, then type false.");
boolean TotalorNot = true;
TotalorNot = scan.nextBoolean();
if (TotalorNot) {
System.out.println ("Type in the number of one-hundred dollar bills.");
hundredDollar = scan.nextInt();
System.out.println ("Type in the number of fifty dollar bills.");
fiftyDollar = scan.nextInt();
System.out.println ("Type in the number of twenty dollar bills.");
twentyDollar = scan.nextInt();
System.out.println ("Type in the number of ten dollar bills.");
tenDollar = scan.nextInt();
System.out.println ("Type in the number of five dollar bills.");
fiveDollar = scan.nextInt();
System.out.println ("Type in the number of one dollar bills or coins.");
dollar = scan.nextInt();
System.out.println ("Type in the number of half-dollar coins.");
halfDollar = scan.nextInt();
System.out.println ("Type in the number of quarter-dollar coins.");
quarter = scan.nextInt();
System.out.println ("Type in the number of dimes.");
dime = scan.nextInt();
System.out.println ("Type in the number of nickels.");
nickel = scan.nextInt();
System.out.println ("Type in the number of pennies coins.");
penny = scan.nextInt();
totalMoney = (hundredDollar * 100) + (fiftyDollar * 50) + (twentyDollar * 20) + (tenDollar * 10) + (fiveDollar * 5) + (dollar * 1) + ((double)halfDollar * 0.5) + ((double)quarter * 0.25) + ((double)dime * 0.1) + ((double)nickel * 0.05) + ((double)penny * 0.01);
System.out.println ("Here is total monetary value of the bills and coins you entered: " + totalMoney);
} else {
System.out.println ("Type in the total monetary value:");
totalMoney = scan.nextDouble();
hundredDollar = ((int)totalMoney/100);
fiftyDollar = ((int)totalMoney - (hundredDollar * 100))/50;
twentyDollar = ((int)totalMoney - (fiftyDollar * 50))/20;
tenDollar = ((int)totalMoney - (twentyDollar * 20))/10;
fiveDollar = ((int)totalMoney - (tenDollar * 10))/5;
dollar = ((int)totalMoney - (fiveDollar * 5))/1;
(double) halfDollar = (totalMoney - (dollar * 1))/0.5;
quarter = ((int)totalMoney - (halfDollar * 0.5))/0.25;
dime = ((int)totalMoney - (quarter * 0.25))/0.1;
nickel = ((int)totalMoney - (dime * 0.1))/0.05;
penny = ((int)totalMoney - (nickel * 0.05))/0.01;
System.out.println (hundredDollar + " hundred dollar bills");
System.out.println (fiftyDollar + " fifty dollar bills");
System.out.println (twentyDollar + " twenty dollar bills");
System.out.println (tenDollar + " ten dollar bills");
System.out.println (fiveDollar + " five dollar bills");
System.out.println (dollar + " one dollar bills or coins");
System.out.println (halfDollar + " half-dollar coins");
System.out.println (quarter + " quarter-dollar coins");
System.out.println (dime + " dimes");
System.out.println (nickel + " nickel");
System.out.println (penny + " penny");
}
}
}
使用會話like ... hundredDollar =(int)(totalMoney/100); –