我是一个java初学者，试图制作一个可以接受混合数字和分数的计算器，而不是计算它只是将两者结合起来的值。(ex.1 + 1/2 答案是 11/2 )` import java.util.Scanner; 公共类计算器{
public static void main(String[] args) {
Scanner Woith = new Scanner(System.in);
System.out.println("Welcome to the Calc-O-Lator 9000\nthis calculator is able to\nadd, subtract, mulitiple, divide, and handle exponents of\nFRACTIONS\n\nenter 'quit' when done");
System.out.println("To input a mixed number use an underscore in addition with a slash(ex. 2_1/2), also provide a space between the first number and operator\n and the operator and the second number.");
Boolean on=true;
Scanner console=new Scanner(System.in);String firstNumber = Woith.next();
if (firstNumber.equals("quit")) {
on = false;
System.out.println("goodbye");
} else {
firstNumber = parseFullNumber(firstNumber);
}
String operator = Woith.next();
if (operator.equals("quit")) {
on = false;
System.out.println("goodbye");
} else if (operator.equals("+") || operator.equals("-") || operator.equals("/") || operator.equals("*")) {
} else {
throw new ArithmeticException();
}
String secondNumber = Woith.next();
if (secondNumber.equals("quit")) {
on = false;
System.out.println("goodbye");
} else {
secondNumber = parseFullNumber(secondNumber);
}
int wholeNumber = 0;
int numerator = 0;
int denominator = 0;
System.out.println(calculate(operator , firstNumber, secondNumber, wholeNumber, numerator, denominator));
}
public static String parseFullNumber(String input) {
int wholeNumber = 0;
int numerator = 0;
int denominator = 0;
int underscoreIdx = input.indexOf('_');
int slashIdx = input.indexOf('/');
if (underscoreIdx > -1) {
wholeNumber = Integer.parseInt(input.substring(0, underscoreIdx));
numerator = Integer.parseInt(input.substring(underscoreIdx + 1, slashIdx));
denominator = Integer.parseInt(input.substring(slashIdx + 1, input.length()));
} else {
if (slashIdx > -1) {
numerator = Integer.parseInt(input.substring(0, slashIdx));
denominator = Integer.parseInt(input.substring(slashIdx + 1, input.length()));
} else {
wholeNumber = Integer.parseInt(input);
}
}
return reduce(wholeNumber, numerator, denominator);
}
public static String reduce(int wholeNumber, int numerator, int denominator) {
int absNumerator = Math.abs(numerator);
if (absNumerator > 1) {
int commonFactor = 1;
for (int i = 2; i < Math.min(absNumerator, denominator); i++) {
if (numerator % i == 0 && denominator % i == 0) {
commonFactor = i;
}
}
numerator /= commonFactor;
denominator /= commonFactor;
}
if (absNumerator > denominator) {
int reduction = numerator / denominator;
if (wholeNumber >= 0) {
wholeNumber += reduction;
} else {
wholeNumber -= reduction;
}
numerator %= denominator;
}
if (wholeNumber != 0) {
if (numerator != 0) {
return wholeNumber + "_" + numerator + "/" + denominator;
} else {
return String.valueOf(wholeNumber);
}
} else {
if (numerator != 0) {
return numerator + "/" + denominator;
} else {
return String.valueOf(0);
}
}
}
public static String calculate(String input, String firstNumber,String secondNumber,int wholeNumber,int numerator,int denominator){
if (input.contains ("+"))
{
if(!input.contains("/")){
return ("The answer is "+firstNumber + secondNumber);
}
if (input.contains("/")){
return ("The answer is "+(numerator*denominator)+(numerator*denominator)+"/"+(numerator*denominator));
}
if(input.contains("_")){
return ("The answer is "+wholeNumber+numerator+"/"+denominator);
}
if(input.contains("-")){
if(!input.contains("/")){
return ("The answer is "+firstNumber + secondNumber);
}
if (input.contains("/")){
return ("The answer is "+(numerator*denominator)+"/"+(numerator*denominator));
}
if(input.contains("_")){
return ("The answer is "+wholeNumber+numerator+"/"+denominator);
}
if(input.contains("*")){
if(!input.contains("/")){
return ("The answer is "+firstNumber + secondNumber);
}
if (input.contains("/")){
return ("The answer is "+(numerator*numerator)+"/"+(denominator*denominator));
}
if(input.contains("_")){
return ("The answer is "+wholeNumber+numerator+"/"+denominator);
}
}
}
}
return input;
}
}