【java】第2章基本程序设计测试题（作业部分）

深碍√TFBOYSˉ_ 2022-11-07 14:39 2阅读 0赞

### 文章目录 ###

*   *  2.7
     *  2.8
     *  2.17
     *  2.22

## 2.7 ##

![在这里插入图片描述][20210312230112581.png]

//2.7
    import java.util.Scanner;
    public class Demo {
        
    
    	public static void main(String[] args) {
        
    		Scanner input = new Scanner(System.in);
    		System.out.print("Enter the number of minutes: ");
    		long minutes, years, days, allDays;
    		minutes = input.nextLong();
    		allDays = minutes / (60 * 24);
    		years = allDays / 365;
    		days = allDays % 365;
    		System.out.print(minutes + " minutes is approximately "
    				+ years + " years and " + days + " days ");
    	}
    
    }

## 2.8 ##

![在这里插入图片描述][20210312230011131.png]

//2.8 (2-7改)
    import java.util.Scanner;
    public class Demo {
        
    
    	public static void main(String[] args) {
        
    		Scanner input = new Scanner(System.in);
    		System.out.print("Enter the time zone offset to GMT: ");
    		long zoneOffset = input.nextInt();
    		long totalMilliSeconds = System.currentTimeMillis();
    		long totalSeconds = totalMilliSeconds / 1000;
    		long currentSecond = totalSeconds % 60;
    		long totalMinutes = totalSeconds / 60;
    		long currentMinute = totalMinutes % 60;
    		long totalHours = totalMinutes / 60;
    		long currentHour = totalHours % 24;
    		currentHour += zoneOffset;
    		System.out.print("The current time is " + currentHour 
    				+ ":" + currentMinute + ":" + currentSecond);
    	}
    
    }

## 2.17 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ1ODc4Mjky_size_16_color_FFFFFF_t_70]

//2.17
    import java.util.Scanner;
    public class Demo {
        
    
    	public static void main(String[] args) {
        
    		Scanner input = new Scanner(System.in);
    		double ta, v, twc, tmp;
    		System.out.println("Enter the temperature in Fahrenheit between -58°F and 41°F: ");
    		ta = input.nextDouble();
    		System.out.print("Enter the wind speed (>=2) in mils per hour: ");
    		v = input.nextDouble();
    		tmp = Math.pow(v, 0.16);
    		twc = 35.74 + 0.6215 * ta - 35.75 * tmp + 0.4275 * ta * tmp;
    		System.out.println("The wind chill index is " + twc);
    	}
    
    }

## 2.22 ##

![在这里插入图片描述][20210312234148226.png]

//2.22 (2-10改)
    import java.util.Scanner;
    public class Demo {
        
    
    	public static void main(String[] args) {
        
    		Scanner input = new Scanner(System.in);
    		System.out.print("Enter an amount in int, " + 
    		"which the last two numbers mean cents (for exampel 1156 means 11.56) : ");
    		int amount = input.nextInt();
    		int remainingAmount = amount;
    		int numberOfOneDollars = remainingAmount / 100;
    		remainingAmount = remainingAmount % 100;
    		int numberOfQuarters = remainingAmount / 25;
    		remainingAmount = remainingAmount % 25;
    		int numberOfDimes = remainingAmount / 10;
    		remainingAmount = remainingAmount % 10;
    		int numberOfNickels = remainingAmount / 5;
    		remainingAmount = remainingAmount % 5;
    		int numberOfPennies = remainingAmount;
    		System.out.println("Your amount " + amount + " consist of");
    		System.out.println("    " + numberOfOneDollars + " dollars");
    		System.out.println("    " + numberOfQuarters + " quaters");
    		System.out.println("    " + numberOfDimes + " dimes");
    		System.out.println("    " + numberOfNickels + " nickels");
    		System.out.println("    " + numberOfPennies + " pennies");
    	}
    
    }

[20210312230112581.png]: /images/20221023/26a41fe585e146fba23c0788575db247.png
[20210312230011131.png]: /images/20221023/16363018b1df4961bde6964e459011a3.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ1ODc4Mjky_size_16_color_FFFFFF_t_70]: /images/20221023/e504d13bb74a46cdac26c1d1c1ad2d61.png
[20210312234148226.png]: /images/20221023/d91c387c803f49d1b92110d1029f9acc.png