情報科学I

ArgsCheck.java

public class ArgsCheck
{
    public static void main(String args[]) {
        if(args.length != 1) {
            System.err.println("Wrong arguments");
            return;
        }
        int number = Integer.parseInt(args[0]);
        if(check(number)) {
            System.out.println(number + " is OK!");
        } else {
            System.out.println(number + " is NG!");
        }
    }
    static boolean check(int n) {
        return n >= 100 && n <= 60000;
    }
}

Saving.java

public class Saving
{
    public static void main(String args[]) {
        if(args.length != 3) {
            System.err.println("Wrong arguments");
            return;
        }
        long principal = Long.parseLong(args[0]); // 元金
        double interestRate = Double.parseDouble(args[1]); // 金利率
        int term = Integer.parseInt(args[2]); // 借用期間
        int nowSaving = (int)calculate(principal, 1.0 + interestRate, term);
        System.out.println("Principal     : " + principal);
        System.out.println("Interest rate : " + interestRate);
        System.out.println("Term          : " + term);
        System.out.println("Now Saving    : " + nowSaving);
    }
    static double calculate(long principal, double interestRate, int term) {
        for(int t = 1; t <= term; t++) {
            principal *= interestRate;
        }
        return principal;
    }
}