template<typename T>
void checkInput(T& x) {
    while(cin.fail()) {
    std::cin.clear();  //Clear all the flags
    std::cin.ignore(std::numeric_limits<std::streamsize>::max(), 'n');  // Throw away the rest of the line
    std::cout<<"Wrong entry type, enter the correct type input as suggested : " << std::endl;
    std::cin >> x;
    }
}


int main() {

    char ch;

    std::cout<<"Input a single Character, followed by : ";
    std::cin >> ch; checkInput(ch);

    std::cout<<std::endl<<"User input character is t" << ch;

}

Input a single Character, followed by : abc
User input character is     a

Input a single Character, followed by : 123
User input character is     1