请给点指导

我有这个代码，这基本上是我试图学习c++，我不知道为什么我一直得到两个错误

错误:请求成员'length'在'cInputChar'中，它是非类类型'char [0]'

和

错误:从'char*'到'char'的转换无效

我认为这与我声明字符变量cInputChar的方式有关。这个问题肯定与getChar函数有关。

我的代码如下

int getInteger(int& nSeries);
char getChar(char& cSeriesDecision, int nSeries);
int main()
{
int nSeries = 0;
char cSeriesDecision = {0};
getInteger(nSeries);
getChar(cSeriesDecision, nSeries);
return 0;
}
//The function below attempts to get an integer variable without using the '>>'    operator.
int getInteger(int& nSeries)
{
//The code below converts the entry from a string to an integer value.
string sEntry;
stringstream ssEntryStream;
 while (true)
 {
  cout << "Please enter a valid series number: ";
   getline(cin, sEntry);
   stringstream ssEntryStream(sEntry);
   //This ensures that the input string can be converted to a number, and that the series number is between 1 and 3.
   if(ssEntryStream >> nSeries && nSeries < 4 && nSeries > 0)
   {
       break;
   }
   cout << "Invalid series number, please try again." << endl;
 }
 return nSeries;
 }
 //This function tries to get a char from the user without using the '>>' operator.
 char getChar(char& cSeriesDecision, int nSeries)
 {
 char cInputChar[0];
 while (true)
 {
   cout << "You entered series number " << nSeries << "/nIs this correct? y/n: ";
   cin.getline(cInputChar, 1);
   if (cInputChar.length() == 1)
   {
     cSeriesDecision = cInputChar;
     break;
   }
  cout << "/nPlease enter a valid decision./n";
}
return cSeriesDecision;
}