c++ - How do I use cin in a while loop? -

i'm trying user input name(s) using while loop array , cin, after last person's name input, program crashes instead of moving on. there way fix this, or need change code? i'm new c++, can answers given possible?

#include <iostream> #include <string>  using namespace std;  int main() {     unsigned int numberofplayers;         number://loop here if more 4 players     cout << "number of players: ";     cin >> numberofplayers;         if(numberofplayers > 4 || numberofplayers < 1){             cout << "invalid number, please enter number 1 4." << endl;             goto number;         }     string name[numberofplayers];     cout << "enter name" << endl;     int = 1;     while(a < numberofplayers + 1){         cout << "player " << << ": ";         cin >> name[a];         cout << "hello, " << name[a] << "." << endl;         a++;     }  } 

you facing array index out of bound, change while loop , set a=0 fill 0th index.

while(a < numberofplayers){  }