编译代码时，我得到了错误的操作数错误

Question

每当我尝试编译代码时，我都会得到一个糟糕的操作数＆＃39;涉及布尔和int数组的错误。任何帮助，将不胜感激。谢谢！

System.out.println("Passed: " + passed); 

if (exam.totalIncorrect() > 0)
{
    System.out.println("The incorrect answers are: "); 

    int missedIndex; 

    for (int i = 0; i < exam.totalIncorrect(); i++)
    {
        missedIndex = exam.questionsMissed()[i]+1; 
        System.out.print(" " + missedIndex); 
    }
}

我得到的错误是：

   DriverExamApplication.java:58: error: bad operand types for binary operator   
   '+'   
            missedIndex = exam.questionsMissed() [i] +1; 

                                         ^

first type:  boolean

second type: int

Answer 1

您正在尝试添加一个带整数的布尔值....

直接打印并节省转换类型的时间

System.out.print(" " + exam.questionsMissed()[i]+i+1);

Answer 2

看起来exam.questionsMissed()返回一个布尔数组。然后exam.questionsMissed()[i]是布尔值，你正在尝试向它追加1。