这是我的java程序，这是它的工作原理。首先，它要求用户输入他/她的名字，然后显示用户得分和旁边的名字，然后它要求第二个用户输入数学方程式，而另一个用户必须计算出方程式，如果他做得对，他得到10如果错误他得不到积分，用户可以在玩家完成解决他的等式之后退出，而用户需要退出＆＃34;退出＆＃34;然后它输出他们的分数，然后计算谁拥有较高分数，如果玩家1得分较高，那么玩家2则表示＆＃34;玩家名称＆＃34;胜！或相反，如果用户具有相同的分数，它只是说＆＃34;它是一个平局！＆＃34;
import java.util.*;
public class Mathgame {
public static void main(String[] args) {
String[] player =new String[3];
double scorea = 0;
double scoreb = 0;
Scanner input = new Scanner(System.in);
for (int i=0;i<2;i++) {
int c=i;
System.out.println("Welcome to the maths quiz game please input player name "+c++);// tells the player to input his/her name
player[i] = input.next();
}
System.out.println("-------------------------------------");//shows a list of players which has been outputted
System.out.println("\t\tPLAYER LIST ");
System.out.println(player[0]+"\t"+"\t"+"score:"+"\t"+scorea);
System.out.println(player[1]+"\t"+"\t"+"score:"+"\t"+scoreb);
System.out.println("-------------------------------------");
double answer = 0;
double numA, numB;
char operator;
char operator2;
boolean quit = false;
double sum1;
double sum2;
numA = 0;
numB = 0;
operator = Character.MIN_VALUE;
while (quit == false) {
System.out.println("to exit the game you need to type quit ");//ask the user if he wants to quit if yes he needs to type "quit" and hit enter
System.out.println("");
System.out.println("Please enter your equation please "+player[1]+"press enter for each number and mathematical symbol"); // tells tuser 1 to put a math number or symbol
System.out.println("");
String s=input.next();// this to allow the user to input a word "quit" to activte the quit fuction
if(s.equals("quit")){//if the user quits thiss will be outputted saying thier name and score next to them
System.out.println("Thanks for playing");
System.out.println("-------------------------------------");
System.out.println("\t\tPLAYER LIST ");
System.out.println(player[0]+"\t"+"\t"+"score:"+"\t"+scorea);
System.out.println(player[1]+"\t"+"\t"+"score:"+"\t"+scoreb);
System.out.println("-------------------------------------");
if (scorea > scoreb){//it checks to see who has the higher score if
System.out.println(player[0]+ "\tWins!");
quit = true; break;
}
else if (scorea < scoreb) {
System.out.print(player[1]+ "\tWins!");
quit = true; break;
}
else if (scorea == scoreb)
System.out.print("Is a tie!");
quit = true; break;
}
numA = Double.parseDouble(s);
operator = input.next().charAt(0);
numB = input.nextDouble();
do {
numA = Double.parseDouble(a); // here you had Double.parseDouble(s) which is wrong
operator2 = input.next().charAt(0);
numB = input.nextDouble();
switch (operator) {
case '+':
answer = numA + numB;
break;
case '-':
answer = numA - numB;
break;
case '*':
answer = numA * numB;
break;
case '/':
answer = numA / numB;
break;
case '^':
answer = (int) Math.pow(numA, numB);
break;
default:
System.out.println("Invlaid character or symbol please input again ");
break;
}
} while
System.out.println("");
System.out.println(player[0]+"\t solve the equation");
sum2 = input.nextDouble();
if (sum2 == answer){
scoreb = scoreb + 10.00;
System.out.println("correct you got 10 points to your score");
System.out.println("");
} else{ System.out.println("incorrcet you got no points the corrcet answer was:"+"" + answer);
}
numA = 0;
numB = 0;
operator = Character.MIN_VALUE;
answer = Double.NaN;
System.out.println("");
System.out.println("to exit the game you need to type quit ");
System.out.println("");
System.out.println("Please enter your equation please "+player[0]+"press enter for each number and mathematical symbol");
String a=input.next();
if(a.equals("quit")){
System.out.println("Thanks for playing");
System.out.println("-------------------------------------");
System.out.println("\t\tPLAYER LIST ");
System.out.println(player[0]+"\t"+"\t"+"score:"+"\t"+scorea);
System.out.println(player[1]+"\t"+"\t"+"score:"+"\t"+scoreb);
System.out.println("-------------------------------------");
if (scorea > scoreb){
System.out.println(player[0]+ "\tWins!");
quit = true; break;
}
else if (scorea < scoreb) {
System.out.print(player[1]+ "\tWins!");
quit = true; break;
}
else
System.out.print("Is a tie!");
quit = true; break;
}
do {
numA = Double.parseDouble(a); // here you had Double.parseDouble(s) which is wrong
operator2 = input.next().charAt(0);
numB = input.nextDouble();
switch (operator) {
case '+':
answer = numA + numB;
break;
case '-':
answer = numA - numB;
break;
case '*':
answer = numA * numB;
break;
case '/':
answer = numA / numB;
break;
case '^':
answer = (int) Math.pow(numA, numB);
break;
default:
System.out.println("Invlaid character or symbol please input again ");
break;
}
} while
System.out.println("");
System.out.println(player[1]+"\t solve the equation");
System.out.println("");
sum1 = input.nextDouble();
if (sum1 == answer){
scorea = scorea + 10.00;
System.out.println("correct you got 10 points to your score");
System.out.println("");
} else{ System.out.println("incorrcet you got no points the corrcet answer was:"+"" + answer);
System.out.println("");
}
numA = 0;
numB = 0;
operator = operator = Character.MIN_VALUE;
answer = Double.NaN;
}
}
}
我如何添加一个会产生某种循环的代码，但只有当在switch操作符选择时才选择类似+ _ * / ^然后它继续我下面的其他代码串，如果它在案例列表中选择none，它循环返回告诉用户输入数学等式
do {
numA = Double.parseDouble(a); // here you had Double.parseDouble(s) which is wrong
operator2 = input.next().charAt(0);
numB = input.nextDouble();
switch (operator) {
case '+':
answer = numA + numB;
break;
case '-':
answer = numA - numB;
break;
case '*':
answer = numA * numB;
break;
case '/':
answer = numA / numB;
break;
case '^':
answer = (int) Math.pow(numA, numB);
break;
default:
System.out.println("Invlaid character or symbol please input again ");
break;
}
} while