错误C2109:下标需要数组或指针类型

Question

我正在尝试调试一些功课,但我遇到了这些代码行的问题

#include "stdafx.h"
#include<conio.h>
#include<iostream>
#include<string>
using namespace std;

int main()
{
   char word;
   cout << "Enter a word and I will tell you whether it is" << endl <<
 "in the first or last half of the alphabet." << endl << 
   "Please begin the word with a lowercase letter. --> ";
   cin >> word;
   if(word[0] >= 'm')
     cout << word << " is in the first half of the alphabet" << endl;
   else
     cout << word << " is in the last half of the alphabet" << endl;
   return 0;
}  

我得到以下错误,我不知道它的含义是什么

error C2109: subscript requires array or pointer type

Answer 1

术语下标是指[]运算符的应用.在你word[0]的[0]部分是下标.

内置[]运算符只能与数组或指针一起使用.您正在尝试将它与类型的对象char(您word的声明为char)一起使用,它既不是数组也不是指针.这就是编译器告诉你的.