Want to print CHENGATSERING many times.

Answer 1

This is quite simple, you can do it on your own as telling from your achievements, you already completed five lessons here at SoloLearn C++.

Answer 2

This should do.

#include <iostream>
#include <string>

int main()
{
    std::string str = "CHENGATSERING";
    int strLength = str.length();
    for (int i = strLength - 1; strLength >= 0; i--)
    {
        std::cout << str << std::endl;
        str.erase(i);
    }
}