Question

我是java的新手，想知道如何将用户输入（整数）更改为十进制形式。例如，如果用户输入6作为年度兴趣，则在计算完成之前将其更改为0.06并打印答案。

此程序仅用于确定银行帐户的持续时间...但我也应该以年和月的格式打印。我不知道怎么做，除了输入另一个if语句并说if（从上面的计算回答＆gt; 12）从计算中减去12并将add1添加到年...并以某种方式将其放入循环中。

如果有人有建议/指示给予这样做，那真的很有帮助！

import java.util.*;

class Two {
  public static void main(String[] args) {
    Scanner imp = new Scanner(System.in);
    System.out.print("Enter your initial balance: ");
    double bal = imp.nextDouble();
    System.out.print("Enter your yearly interest: ");
    double intr = imp.nextInt();
    System.out.print("Enter your monthly withdrawls: ");
    double wtd = imp.nextDouble();
    if (true) { //need to change 
      System.out.print("Your account will last " + (((bal*intr) + bal)/ wtd) + " months");
    } else { System.out.print("The account will last forever");

    }
  }

}

Answer 1

尝试

double intr = ((double)imp.nextInt()/100);

修改

哎呀，我错过了那个嵌套的问题。请参阅How to convert months to years-and-months。

Answer 2

您想要转换为百分比，因此您必须除以100.这是一个可能的解决方案：

double intrAsDouble = ((double)intr)/100;

哦，至于日期的事情：

int totalMonths = ((bal*intrAsDouble) + bal))/wtd;
int years = (int)(totalMonths/12);
int months = totalMonths%12;

String accountWillLast = "";

boolean hasMonths = months != 0;
boolean hasYears = years != 0;

if (hasYears) {
    accountWillLast = accountWillLast + years;
    if (years == 1) accountWillLast = accountWillLast + " year";
    else accountWillLast = accountWillLast + " years";
}
if (hasMonths && hasYears) {
    accountWillLast = accountWillLast + " and ";
}
if (hasMonths) {
    accountWillLast = accountWillLast + months;
    if (months == 1) accountWillLast = accountWillLast + " month";
    else accountWillLast = accountWillLast + " months";
}

Answer 3

你可以乘以0.01（这可以避免显式转换虽然从int到double的转换需要以某种方式发生）

double intr = imp.nextInt()*0.01;

并将月份转换为年+月检查整数除法和模运算符

int months = 18;//calculated

int years = month/12;//integer division is a implicitly rounded down
months = months%12;

或者如果你真的需要制作一个循环

int months = 18;//calculated
int years = 0;
while(months >= 12){
    months -= 12;
    years += 1;
}

如何将用户输入从整数更改为十进制

3 个答案: