import java.util.*;
public class TarotCard
{
public static void main(String[] args)
{
Scanner scanner = new Scanner(System.in);
Number();
int a = placeholder;
Number();
int b = placeholder;
Number();
int c = placeholder;
Number();
int d = placeholder;
int total = a + b + c + d;
if (toatal <= 9)
{
Hearts();
}
else
{
if (total <= 18)
{
Spades();
}
else
{
if(total <= 27)
{
Clubs();
}
else
{
Diamonds();
}
}
}
}
}
public int Number()
{
System.out.println("please enter a one digit number");
import java.util.*;
public class TarotCard
{
public static void main(String[] args)
{
Scanner scanner = new Scanner(System.in);
int placeholder = 0;
Number(placeholder, scanner);
int a = placeholder;
int total = a;
Number(placeholder, scanner);
int b = placeholder;
total = b + total;
Number(placeholder, scanner);
int c = placeholder;
total = c + total;
Number(placeholder , scanner);
int d = placeholder;
total = d + total;
if(total <= 9)
{
Hearts();
}
if(total > 9 && total <= 18)
{
Clubs();
}
if(total > 18 && total <= 27)
{
Spades();
}
if(total > 27 && total <= 36)
{
Diamonds();
}
}
public static int Number(int placeholder,Scanner scanner)
{
System.out.println("please enter a one digit number");
placeholder = scanner.nextInt();
return placeholder;
}
public static void Hearts()
{
Random deck = new Random();
int cardtype = deck.nextInt(52)+1;
if(cardtype > 13);
{
cardtype = deck.nextInt(2);
if(cardtype == 0)
{
System.out.println("your tarrot is king of hearts");
}
if(cardtype == 1)
{
System.out.println("your tarrot is queen of hearts");
}
if(cardtype == 2)
{
System.out.println("your tarrot is jack of hearts");
}
}
if(cardtype < 12);
{
cardtype = deck.nextInt(10)+1;
if(cardtype == 1);
{
System.out.println("your tarot is ace of hearts");
}
if(cardtype == 2);
{
System.out.println("your tarot is two of hearts");
}
if(cardtype == 3);
{
System.out.println("your tarot is three of hearts");
}
if(cardtype == 4);
{
System.out.println("your tarrot is four of hearts");
}
if(cardtype == 5);
{
System.out.println("your tarrot is 5 of hearts");
}
if(cardtype == 6);
{
System.out.println("your tarrot is 6 of hearts");
}
if(cardtype == 7);
{
System.out.println("your tarrot is 7 of hearts");
}
if(cardtype == 8);
{
System.out.println("your tarrot is 8 of hearts");
}
if(cardtype == 9);
{
System.out.println("your tarrot is 9 of hearts");
}
if(cardtype == 10);
{
System.out.println("your tarrot is 10 of hearts");
}
}
}
public static void Spades()
{
Random deck = new Random();
int cardtype = deck.nextInt(52)+1;
if(cardtype > 13);
{
cardtype = deck.nextInt(2);
if (cardtype == 0)
{
System.out.println("your tarrot is king of spades");
}
if (cardtype == 1)
{
System.out.println("your tarrot is queen of spades");
}
if (cardtype == 2)
{
System.out.println("your tarrot is jack of spades");
}
}
if(cardtype < 12);
{
cardtype = deck.nextInt(10)+1;
if (cardtype == 1);
{
System.out.println("your tarot is ace of spades");
}
if (cardtype == 2);
{
System.out.println("your tarot is two of spades");
}
if (cardtype == 3);
{
System.out.println("your tarot is three of spades");
}
if (cardtype == 4);
{
System.out.println("your tarrot is four of spades");
}
if (cardtype == 5);
{
System.out.println("your tarrot is 5 of spades");
}
if (cardtype == 6);
{
System.out.println("your tarrot is 6 of spades");
}
if (cardtype == 7);
{
System.out.println("your tarrot is 7 of spades");
}
if (cardtype == 8);
{
System.out.println("your tarrot is 8 of spades");
}
if (cardtype == 9);
{
System.out.println("your tarrot is 9 of spades");
}
if (cardtype == 10);
{
System.out.println("your tarrot is 10 of spades");
}
}
}
public static void Clubs()
{
Random deck = new Random();
int cardtype = deck.nextInt(52)+1;
if(cardtype > 13);
{
cardtype = deck.nextInt(2);
if (cardtype == 0)
{
System.out.println("your tarrot is king of clubs");
}
if (cardtype == 1)
{
System.out.println("your tarrot is queen of clubs");
}
if (cardtype == 2)
{
System.out.println("your tarrot is jack of clubs");
}
}
if(cardtype < 12);
{
cardtype = deck.nextInt(10)+1;
if (cardtype == 1);
{
System.out.println("your tarot is ace of clubs");
}
if (cardtype == 2);
{
System.out.println("your tarot is two of clubs");
}
if (cardtype == 3);
{
System.out.println("your tarot is three of clubs");
}
if (cardtype == 4);
{
System.out.println("your tarrot is four of clubs");
}
if (cardtype == 5);
{
System.out.println("your tarrot is 5 of clubs");
}
if (cardtype == 6);
{
System.out.println("your tarrot is 6 of clubs");
}
if (cardtype == 7);
{
System.out.println("your tarrot is 7 of clubs");
}
if (cardtype == 8);
{
System.out.println("your tarrot is 8 of clubs");
}
if (cardtype == 9);
{
System.out.println("your tarrot is 9 of clubs");
}
if (cardtype == 10);
{
System.out.println("your tarrot is 10 of clubs");
}
}
}
public static void Diamonds()
{
Random deck = new Random();
int cardtype = deck.nextInt(52)+1;
if(cardtype > 13);
{
cardtype = deck.nextInt(2);
if (cardtype == 0)
{
System.out.println("your tarrot is king of diamonds");
}
if (cardtype == 1)
{
System.out.println("your tarrot is queen of diamonds");
}
if (cardtype == 2)
{
System.out.println("your tarrot is jack of diamonds");
}
}
if(cardtype < 12);
{
cardtype = deck.nextInt(10)+1;
if (cardtype == 1);
{
System.out.println("your tarot is ace of diamonds");
}
if (cardtype == 2);
{
System.out.println("your tarot is two of diamonds");
}
if (cardtype == 3);
{
System.out.println("your tarot is three of diamonds");
}
if (cardtype == 4);
{
System.out.println("your tarrot is four of diamonds");
}
if (cardtype == 5);
{
System.out.println("your tarrot is 5 of diamonds");
}
if (cardtype == 6);
{
System.out.println("your tarrot is 6 of diamonds");
}
if (cardtype == 7);
{
System.out.println("your tarrot is 7 of diamonds");
}
if (cardtype == 8);
{
System.out.println("your tarrot is 8 of diamonds");
}
if (cardtype == 9);
{
System.out.println("your tarrot is 9 of diamonds");
}
if (cardtype == 10);
{
System.out.println("your tarrot is 10 of diamonds");
}
}
}
}
此代码运行，我的问题是它没有按我希望的方式运行。我想要的是if语句和方法导致只打印出一个tarot。现在，当程序运行时，它打印出所有塔罗牌。我认为我的错误在于如何构建我的if语句，任何建议？
答案 0 :(得分：0)
您的if和else条件结构不正确。 if else的正确语法如下：
if (condition1) {
// do something
}
else if (condition2) {
// do something else
}
else {
// other
}
试用此版本的代码：
public static void main (String[] args) {
Scanner scanner = new Scanner(System.in);
Number();
int a = placeholder;
Number();
int b = placeholder;
Number();
int c = placeholder;
Number();
int d = placeholder;
int total = a + b + c + d;
if (toatal <= 9) {
Hearts();
}
else if (total <= 18) {
Spades();
}
else if (total <= 27) {
Clubs();
}
else {
Diamonds();
}
}
答案 1 :(得分：0)
您必须将Number（）方法的返回值分配给int变量，参数占位符不会更改主类中占位符的值。
public static void main(String[] args)
{
int a = Number();
int total = a;
int b = Number();
total = b + total;
int c = Number();
total = c + total;
int d = Number();
total = d + total;
if(total <= 9)
{
Hearts();
}
if(total > 9 && total <= 18)
{
Clubs();
}
if(total > 18 && total <= 27)
{
Spades();
}
if(total > 27 && total <= 36)
{
Diamonds();
}
}
public static int Number()
{
Scanner scanner = new Scanner(System.in);
System.out.println("please enter a one digit number");
return scanner.nextInt();
}
当然，在if。
之后删除分号用于在Java中传递参数：Is Java "pass-by-reference" or "pass-by-value"?