1.3.1 浮点数

体会浮点数的用处

package test;

import java.util.Scanner;

public class Test1java {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        int foot;
        int inch;
        Scanner in = new Scanner(System.in);
        
        foot = in.nextInt();
        inch = in.nextInt();
        // 这里的12.0保证了计算结果
        System.out.println((foot+inch/12.0)*0.3048);
    }

}

package test;

import java.util.Scanner;

public class Test1java {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        double foot;
        double inch;
        Scanner in = new Scanner(System.in);
        
        foot = in.nextInt();
        inch = in.nextInt();
        
        System.out.println((foot+inch/12)*0.3048);
    }

}

package test;

import java.util.Scanner;

public class Test1java {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        double foot;
        double inch;
        Scanner in = new Scanner(System.in);
        
        foot = in.nextDouble();
        inch = in.nextDouble();
        
        System.out.println((foot+inch/12)*0.3048);
    }

}

比较上述代码异同