我正在为我的CS课编写程序。设置起来并不难,它可以完成预期的工作。但是我的问题是我希望它在同一行上接受所有输入而没有任何空格。该程序应该采用ISBN的前9位数字,然后找到第十位并打印出来。我知道您可以通过将数字作为字符串然后解析(我相信吗)来做到这一点,以便获得独立的整数。尽管我不能完全确定我上次尝试正确设置了while循环,但这样做会使我不得不完全更改代码吗?这是问题所在:
(业务:检查ISBN-10)ISBN-10(国际标准书号)
由10位数字组成:d1d2d3d4d5d6d7d8d9d10。最后一位数字d10是校验和,
使用以下公式从其他九位数字计算得出:
(d1 * 1 + d2 * 2 + d3 * 3 + d4 * 4 + d5 * 5 +
d6 * 6 + d7 * 7 + d8 * 8 + d9 * 9)%11
如果校验和为10,则根据ISBN-10,最后一位表示为X。
惯例。编写一个程序,提示用户输入前9位数字,然后
显示10位ISBN(包括前导零)。您的程序应阅读
输入为整数。
无论哪种方式,代码都是没有循环的空白输入:
/* Class: CS1301
* Section: 9:30
* Term: Fall 2015
* Name: Matthew Woolridge
* Instructor: Mr. Robert Thorsen
* Assignment: 4
* Program: 1
* ProgramName: ISBN_Number
* Purpose: Prompts the user to enter the first nine numbers of an ISBN and calculates the tenth
* Operation: The information to be numbers are statically instantiated in the code and
* the table is output to the screen.
* Input(s): The user inputs the first nine ISBN numbers
* Output(s): The output will be the full the tenth ISBN number in the full number
* Methodology: The program will use if statements and defined variables which use the user input variables to calculate the ISBN
* and return it to the user.
*
*/
import java.util.Scanner;
public class ISBN_Number
{
public static void main (String[] args)
{
/******************************************************************************
* Declarations Section *
******************************************************************************/
/****************************CONSTANTS********************************/
int [] ISBN = new int [8];
int num1 = 0;
int nextNum;
int i;
int input=0;
int num10=0;
String fullIsbn;
Scanner scan = new Scanner (System.in); //Scanner utility initialization
/******************************************************************************
* Inputs Section *
******************************************************************************/
System.out.print("Please input the first nine digits (between 0-9) of your ISBN not including the leading 0: ");
for (i = 0; i<ISBN.length;i++)
{
nextNum = scan.nextInt(); // For loop that asks for an input until it fills the array of 8
ISBN[i] = nextNum;
++input;
}
/****************************variables********************************/
if (input == 8)
{
num10 = (ISBN[0] * 1 + ISBN[1] * 2 + ISBN[2] * 3 + ISBN[3] * 4 + ISBN[4] * 5 + ISBN[5] * 6 + ISBN[6] * 7 + ISBN[7] * 8 + ISBN[8] * 9) % 11; // Calculates the value of num10
}
else
{
System.out.println("You did not input enough or input too many digits.");
}
/******************************************************************************
* Processing Section *
******************************************************************************/
if (num10 == 10)
{
fullIsbn = num1 + ISBN[0] + "" + ISBN[1] + "" + ISBN[2] + "" + ISBN[3] + "" + ISBN[4] + "" + ISBN[5] + "" + ISBN[6] + "" + ISBN[7] + "" + ISBN[8] + "" + "X";
}
else // Determines if num10 is equal to x or not and prints
{
fullIsbn = num1 + "" + ISBN[0] + "" + ISBN[1] + "" + ISBN[2] + "" + ISBN[3] + "" + ISBN[4] + "" + ISBN[5] + "" + ISBN[6] + "" + ISBN[7] + "" + ISBN[8] + "" + num10;
}
/******************************************************************************
* Outputs Section *
******************************************************************************/
System.out.print("The full ISBN number is " + fullIsbn); // Prints the full 10 digit isbn
} // Rnds string
} // Ends program
最佳答案
这是想法:
将用户输入作为int数组的索引。
Sytem.out.print(yourArrayName [9]); //打印出数组的第十个数字
例如:
import java.util.Scanner;
public class Main
{
public static void main (String[] args)
{
Scanner keyboard = new Scanner(System.in);
int [] ISBN = new int [10];
int input =0;
System.out.print("Give me 10 numbers: ");
for (int i = 0; i<ISBN.length;i++){
int nextNumber = keyboard.nextInt();
ISBN[i] = nextNumber;
++input;
if (input==10){
System.out.print("The tenth number you gave me is: "+ISBN[9]);
}
}
}
}
您应该能够应用上述策略,从而实现您所要求的:
import java.util.*;
public class Main
{
public static void main (String[] args)
{
Scanner keyboard = new Scanner(System.in);
int [] ISBN = new int [10];
int input =0;
String fullIsbn;
System.out.print("Give me 10 numbers: ");
for (int i = 0; i<ISBN.length;i++){
int nextNumber = keyboard.nextInt();
ISBN[i] = nextNumber;
++input;
if (input==10){
ISBN[0]=0;
ISBN[9] = (ISBN[0] * 1 + ISBN[1] * 2 + ISBN[2] * 3 + ISBN[3] * 4 + ISBN[4] * 5 + ISBN[5] * 6 + ISBN[6] * 7 + ISBN[7] * 8 + ISBN[8] * 9) % 11;
if (ISBN[9] == 10)
{
fullIsbn = ISBN[0] + "" + ISBN[1] + "" + ISBN[2] + "" + ISBN[3] + "" + ISBN[4] + "" + ISBN[5] + "" + ISBN[6] + "" + ISBN[7] + "" + ISBN[8] + "" + "X";
}
else // Determines if num10 is equal to x or not and prints
{
fullIsbn = ISBN[0] + "" + ISBN[1] + "" + ISBN[2] + "" + ISBN[3] + "" + ISBN[4] + "" + ISBN[5] + "" + ISBN[6] + "" + ISBN[7] + "" + ISBN[8] + "" + ISBN[9];
}
System.out.print("The tenth number you gave me is: "+fullIsbn);
}
}
}
}