本章主要熟练使用Scanner输入数据，通过练习课本带星课后题熟练java常见运算符的使用。
文章目录- Java零基础学习02（有C语言基础）
import java.util.Scanner;
public class Java_1 {
public static void main(String[] args) {
Scanner input=new Scanner(System.in);
System.out.print("Enter the subtotal and a gratuity rate:");
double subtotal=input.nextDouble();
double rate=input.nextDouble();
double srate=subtotal*rate*0.01;
double total=subtotal+srate;
System.out.println("The gratuity is $1.5 and total is $"+total);
}
}
import java.util.Scanner;
public class Java_1 {
public static void main(String[] args) {
Scanner input=new Scanner(System.in);
System.out.print("Enter a number between 0 and 1000 :");
int number=input.nextInt();
int a=number%10;
int b=number/10;
int c=b/10;
int d=b-c*10;
int sum=a+c+d;
System.out.println("The sum of the digits is "+sum);
}
}
import java.util.Scanner;
public class Java_1 {
public static void main(String[] args) {
Scanner input=new Scanner(System.in);
System.out.print("Enter the number of minutes :");
double number=input.nextDouble();
double yeartotal=number/365/24/60;
int year=(int)yeartotal;
double daytotal=365*(yeartotal-year);
int day=(int)daytotal;
System.out.println(number+"minutes is approximately "+year+"years and "+day+"days");
}
}
import java.util.Scanner;
public class Java_1 {
public static void main(String[] args) {
Scanner input=new Scanner(System.in);
System.out.print("Enter the time zone offset to GMT : ");
long zone=input.nextLong();
long totalMilliseconds=zone*60*60*1000;
long totalMillisecondsGMT=System.currentTimeMillis();
long totalMiSecondes=totalMillisecondsGMT-(totalMilliseconds);
long totalseconds=totalMiSecondes/1000;
long seconds=totalseconds%60;
long miniters=totalseconds/60%60;
long hours=totalseconds/60/60%60;
System.out.println("The current time is "+hours+":"+miniters+":"+seconds);
}
}
import java.util.Scanner;
public class Java_1 {
public static void main(String[] args) {
Scanner input=new Scanner(System.in);
System.out.print("Enter the monthly saving amount : ");
double samount=input.nextDouble();
double total=0;
for(int i=0;i<6;i++) {
total = (samount + total) * (1 + 0.00417);
System.out.println("After the sixth month,the account value is $" + total);
}
}
}
import java.util.Scanner;
public class Java_1 {
public static void main(String[] args) {
Scanner input=new Scanner(System.in);
System.out.print("Enter weight in pounds : ");
double weight=input.nextDouble();
System.out.print("Enter height in pounds : ");
double height=input.nextDouble();
double bmi=(weight*0.45359237)/Math.pow(height*0.0254,2);
System.out.println("BMI is "+bmi);
}
}
import java.util.Scanner;
public class Java_1 {
public static void main(String[] args) {
Scanner input=new Scanner(System.in);
System.out.print("Enter the temperature in Fahrenheit between -58F and 41F : ");
double ta=input.nextDouble();
System.out.print("Enter the wind speed(>=2)in miles per hour : ");
double v=input.nextDouble();
double twc=35.74+0.6215*ta-35.75*Math.pow(v,0.16)+0.4275*ta*Math.pow(v,0.16);
System.out.println("The wind chill index is "+twc);
}
}
import java.util.Scanner;
public class Java_1 {
public static void main(String[] args) {
Scanner input=new Scanner(System.in);
System.out.print("Enter the coordinates of three points separated by spaces like x1,y1,x2,y2,x3,y3 : ");
double x1=input.nextDouble();
double y1=input.nextDouble();
double x2=input.nextDouble();
double y2=input.nextDouble();
double x3=input.nextDouble();
double y3=input.nextDouble();
double s1=Math.sqrt(Math.pow((x2-x1),2)+Math.pow((y2-y1),2));
double s2=Math.sqrt(Math.pow((x3-x1),2)+Math.pow((y3-y1),2));
double s3=Math.sqrt(Math.pow((x3-x2),2)+Math.pow((y3-y2),2));
double s=(s1+s2+s3)/2;
double a=s*(s-s1)*(s-s2)*(s-s3);
double area=Math.pow(a,0.5);
System.out.println("The area of the triangle is "+area);
}
}
import java.util.Scanner;
public class Java_1 {
public static void main(String[] args) {
Scanner input=new Scanner(System.in);
System.out.print("Enter balance and interest rate(e.g.,3 for 3%: ");
double balance=input.nextDouble();
double rate=input.nextDouble();
double interest=balance*(rate/1200);
System.out.println("The interest is "+interest);
}
}
import java.util.Scanner;
public class Java_1 {
public static void main(String[] args) {
Scanner input=new Scanner(System.in);
System.out.print("Enter investment amount: ");
double amount=input.nextDouble();
System.out.print("Enter annual interest rate in percentage: ");
double rate=input.nextDouble();
System.out.print("Enter number of year: ");
double number=input.nextDouble();
double fvalue=amount*Math.pow((1+rate/1200),(number*12));
System.out.println("Future value is $"+fvalue);
}
}
import java.util.Scanner;
public class Java_1 {
public static void main(String[] args) {
Scanner input=new Scanner(System.in);
System.out.print("Enter an amount in int,for example,1156 : ");
int amount=input.nextInt();
int numberOfOneDollars=amount/100;
int remainingAmount=amount%100;
int numberOfQuarters=remainingAmount/25;
int numberOfDimes=remainingAmount%25/10;
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+"quarters");
System.out.println(" "+numberOfDimes+"dimes");
System.out.println(" "+numberOfNickels+"nickels");
System.out.println(" "+numberOfPennies+"pennies");
}
}
import java.util.Scanner;
public class Java_1 {
public static void main(String[] args) {
Scanner input=new Scanner(System.in);
System.out.print("Enter the driving distance : ");
double drivingDistance=input.nextDouble();
System.out.print("Enter miles per gallon : ");
double miles=input.nextDouble();
System.out.print("Enter price per galoon: ");
double price=input.nextDouble();
double cost=(drivingDistance/miles)*price;
System.out.println("The cost of driving is $"+cost);
}
}
