[英]Java addition subtraction with money
我試圖增加和減去美元和美分,但我遇到了超過100美分和0美分以下的麻煩。 我的代碼適用於添加任何內容,直到我需要將100美分兌換成1美元。 我在將代碼寫入代碼時遇到了麻煩,但我明白將美分兌換成美元需要做些什么。
FYI這是一個類,這就是為什么我有靜態方法加法/減法和類方法加法/減法的代碼
我的代碼:
package moneyapp;
public class MoneyApp {
public static void main(String[] args)
{
Money money1=new Money(99,99);
Money money6=new Money(100,00);
Money money7=new Money(0,1);
add(money1,money7);
System.out.println("The sum of "+money1+" and "+money7+" is "+money1.add(money7));
subtract(money6,money7);
System.out.println("The difference of "+money6+" and "+money7+" is "+money6.subtract(money7));
}
static Money add(Money money, Money money2)
{
int adddollars=money.dollars+money2.dollars;
int addcents=money.cents+money2.cents;
Money addmoney=new Money(adddollars,addcents);
System.out.println(addmoney.toString());
return addmoney;
}
static Money subtract(Money money, Money money2)
{
int subtractdollars=money.dollars-money2.dollars;
int subtractcents=money.cents-money2.cents;
Money subtractmoney=new Money(subtractdollars,subtractcents);
System.out.println(subtractmoney.toString());
return subtractmoney;
}
}
班級代碼:
package moneyapp;
public class Money
{
int dollars;
int cents;
public Money()
{
dollars=0;
cents=0;
}
public Money(int dollar, int cent)
{
dollars=dollar;
cents=cent;
}
public Money(int dollar)
{
dollars=dollar;
cents=00;
}
public String toString()
{
if(cents<10)
{
return "$"+dollars+"."+"0"+cents;
}
else
{
return "$"+dollars+"."+cents;
}
}
public int getDollars()
{
return dollars;
}
public int getCents()
{
return cents;
}
public void setDollars(int dollars)
{
this.dollars=dollars;
}
public void setCents(int cents)
{
this.cents=cents;
}
public Money add(Money other)
{
int dol=dollars+other.dollars;
int cen=cents+other.cents;
Money answer=new Money(dol,cen);
return answer;
}
public Money subtract(Money other)
{
int dol=dollars-other.dollars;
int cen=cents-other.cents;
Money answer=new Money(dol,cen);
return answer;
}
}
請考慮一下:
public class Money {
private int m;
public Money(int m) {
this.m = m;
}
public int getDollars() {
return m / 100;
}
public int getCents() {
return m % 100;
}
public int get() {
return m;
}
public Money add(Money other) {
return new Money(m + other.get());
}
public Money subtract(Money other) {
return new Money(m - other.get());
}
}
我更新了你的錢類來解決問題。
錢添加
100美分是1美元,因此您可以將美元初始化為:
this.dollars = dollar+cent / 100;
分數的數量等於除法的余數100
this.cents = cents % 100
通過這種方式,美分將始終在0-99之間。
錢減法
雖然您的分數低於零,但您可以通過減少美元金額來借入100美分。
更新的錢類
public class Money {
public final int dollars;
public final int cents;
public Money() {
dollars = 0;
cents = 0;
}
public Money(int dollar, int cent) {
dollars = dollar + cent / 100;
cents = cent % 100;
}
public Money(int dollar) {
dollars = dollar;
cents = 0;
}
public String toString() {
return String.format("$%d.%02d", dollars, cents);
}
public Money add(Money other) {
int dol = dollars + other.dollars;
int cen = cents + other.cents;
Money answer = new Money(dol, cen);
return answer;
}
public Money subtract(Money other) {
int dol = dollars - other.dollars;
int cen = cents - other.cents;
while (cents < 0) {
--dol;
cen += 100;
}
Money answer = new Money(dol, cen);
return answer;
}
}
我會寫一個if聲明說如果美分> = 100然后加入美元靜態貨幣添加(貨幣,錢幣2){int adddollars = money.dollars + money2.dollars; int addcents = money.cents + money2.cents;
if(addcents >= 100){
adddollars++;
}
Money addmoney=new Money(adddollars,addcents);
System.out.println(addmoney.toString());
return addmoney;
}
至於你的減法方法,我會把類似靜態貨幣減法(貨幣貨幣,貨幣貨幣2){int subtractdollars = money.dollars-money2.dollars; int subtractcents = money.cents-money2.cents;
if(subtractcents < 0)
money.dollars--;
money.cents=money.cents + 100;
subtractcents= money.cents-money2.cents;
Money subtractmoney=new Money(subtractdollars,subtractcents);
System.out.println(subtractmoney.toString());
return subtractmoney;
}
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