我不明白为什么我得到错误："else"没有"if"else

Question

我不知道为什么我得到'else没有if'错误。我的格式是正确的。

          if(donationType>2)
          {
             if(donationType == CLOTHING_CODE)
             {
                volunteer = CLOTHING_PRICER;
                message = "a clothing donation";
             }
             else
             {
                volunteer = OTHER_PRICER;
                message = "a non-clothing donation";
         }
         else
             message = "This is an invalid donation type";
             message = "The volunteer who will price this item is invalid";
         }

Answer 1

else后面缺少一个大括号

 if(donationType>2)
     {
         if(donationType == CLOTHING_CODE)
         {
            volunteer = CLOTHING_PRICER;
            message = "a clothing donation";
         }
         else
         {
            volunteer = OTHER_PRICER;
            message = "a non-clothing donation";
         }
    } 
     else
    {
         message = "This is an invalid donation type";
         message = "The volunteer who will price this item is invalid";
     }

Answer 2

您缺少第一个else的右括号}，因此您打算结束第一个if的}实际上结束了else，因此您连续有2个else，因此出现错误。

补上缺少的结束大括号}(并为最后一个else补上开始大括号{)。

Answer 3

每个代码块总是需要正确地打开和关闭。

else
         {
            volunteer = OTHER_PRICER;
            message = "a non-clothing donation";
/*YOU'RE MISSING AN ENDING BRACE HERE*/

Answer 4

您缺少一个}:

         else
         {
            volunteer = OTHER_PRICER;
            message = "a non-clothing donation";
         }
      // ^ was missing
     }

Answer 5

看一下W3School，你少了一个括号

if (condition1) {
    block of code to be executed if condition1 is true
} else if (condition2) {
    block of code to be executed if the condition1 is false and condition2 is true
} else {
    block of code to be executed if the condition1 is false and condition2 is false
}

Answer 6

有两个问题:

问题1:

忘记关闭else部分

 else
             {
                volunteer = OTHER_PRICER;
                message = "a non-clothing donation";

问题2:

你忘记打开else分支，当你正确关闭它时

 else
             message = "This is an invalid donation type";
             message = "The volunteer who will price this item is invalid";
         } 

修改后，你的代码应该是

 if(donationType>2)
          {
             if(donationType == CLOTHING_CODE)
             {
                volunteer = CLOTHING_PRICER;
                message = "a clothing donation";
             }
             else
             {
                volunteer = OTHER_PRICER;
                message = "a non-clothing donation";
              } // I added this 
         }
         else { // I added this
             message = "This is an invalid donation type";
             message = "The volunteer who will price this item is invalid";
         }