指出输入单词以元音、辅音开头单词还有其他的数目，下面程序运行时只有输入而不输出，什么情况

Question

#include<iostream>#include<cctype>#include<string>using namespace std;int main(){ cout << "Enter words (q to quit);"<<endl; char words[20]; int count1 = 0; int count2 = 0; int count3 = 0; while (cin >> words) {  if (isalpha(words[0]))  {   if (words[0] == 'a' || words[0] == 'e' || words[0] == 'i' || words[0] == 'o' || words[0] == 'u' ||    words[0] == 'A' || words[0] == 'E' || words[0] == 'I' || words[0] == 'O' || words[0] == 'U')    count1++;   else if (words[0] == 'q'&&strlen(words) == 1)    break;   else    count2++;  }  count3++; } cout << "元音：" << count1 << endl  << "辅音：" << count2 << endl  << "其他：" << count3 << endl; return 0;}下面程序运行时只有输入，一直再让输入，而不输出，什么情况