Avoid c++ program from breaking with large inputs (cin)

Question

#include <iostream>

int main() {
char test;
std::cin >> test;
std::cout << test << std::endl;
}

Hi, I want to make my program as userproof as possible, and this was just a test i was doing. When I input about 17,000 1's the program starts printing ¿ and keeps on printing ¿ whenever I press return. I want to know if there is a way of stopping this inputs from breaking the program. Is it a problem with ctrl+V or with the size of the input? any help is greatly appreciated.