如何将其更改为接受双精度并使factor2不返回零？

Question

下面的代码应该随机创建两个整数，然后显示给需要将这两个数字除以的用户；但是，当我尝试将答案或响应更改为双倍时，它不起作用。如果您按原样运行它并得到一个诸如1/5之类的问题，那么答案最终为0，因为它是一个整数；5/4最终为1也是如此。

//Variables
String name;
String probType;
String longProbType;
int numProb;
int loFactor;
int hiFactor;
int factor1;
int factor2;
int answer;
int response;
int score;
double scorePct;

case "D":
    for(int i = 0; i < numProb; i++) {
        factor1 = random.nextInt(hiFactor - loFactor + 1) + loFactor;
        factor2 = random.nextInt(hiFactor - loFactor + 1) + loFactor;
        if(factor2 == 0) {
            factor2 += 1;
        }
        System.out.print(String.format("\n%d / %d = ", factor1, factor2));
        response = input.nextInt();
        input.nextLine();
        
        answer = factor1 / factor2;
        
        if(answer == response) {
            score += 1;
            System.out.println("Correct!");
            history[i] = String.format("%d / %d = %d, Correct, correct answer is %d", factor1, factor2, response, answer);
        } else {
            System.out.println(String.format("Incorrect! Correct answer is %d", answer));
            history[i] = String.format("%d / %d = %d, Incorrect, correct answer is %d", factor1, factor2, response, answer);
        }
    }
    
    System.out.println("\nSession Summary");
    System.out.println(String.format("%d problems, %d correct", numProb, score));
    
    scorePct = ((double)score / numProb) * 100;
    System.out.println(String.format("Score is  %.1f\n", scorePct));
    
    System.out.println("\nProblems");
    for(int i = 0; i < numProb; i++) {
        System.out.println(history[i]);
    }
    
    System.out.println(outromessage);
    break;

Answer 1

对于除法，需要将其中一个int值转换为double。然后，JRE将执行浮点除法并生成一个double。这个结果也需要在一个double中捕获。

double result = factor1 / (double) factor2;

请注意，测试浮点相等可能很棘手，会产生假阴性/阳性。