java - 编译代码时出现错误的操作数错误

Question

每次我尝试编译代码时，都会遇到“错误操作数”错误，该错误涉及 bool(boolean) 和int数组。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); 
    }
}

我得到的错误是这样的:

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

                                         ^

first type:  boolean

second type: int

Answer 1

您正在尝试添加带有整数的 bool(boolean) 值...。

直接打印并节省时间转换类型

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