Printing a string letter by letter and with delay [closed]

Question

I'm new to programming and I'm learning two languages simultaneously (Python and C++).

In the Python version of the program I was making, I wrote a function that given a string, and a speed, prints out a string letter by letter, and with a given speed:

def timedprint(txt, speed):
    for c in txt:
        print(c,end='')
        time.sleep(speed)

Then, for example, I could do this:

timedprint('::::::::::Fahrenheit to Celsius / Celsius to Fahrenheit converter::::::::::\n', 0.025)

This will print that string, letter by letter, with a separation of 0.025s each letter.

Now I'm trying to write the same code but using C++ but I cannot find a solution. Is it possible to do the same exact thing I'm doing in Python, but in C++? In a discord server, someone gave me this:

Iterating over characters of a string is easy, then you just need to sleep. See:

https://en.cppreference.com/w/cpp/thread/sleep_for

std::string str = "hello";
for (char c : str) {
std::cout << c;
}

But I don't understand, and it is not what I asked for.

Also found this in this forum:

#include <iostream>
#include <chrono>
#include <thread>

int main() {
  using namespace std::chrono_literals;

  std::cout << "H" << std::flush;
  std::this_thread::sleep_for(500ms);
  std::cout << "e" << std::flush;
  std::this_thread::sleep_for(500ms);
  std::cout << "l" << std::flush;
  std::this_thread::sleep_for(500ms);
  std::cout << "l" << std::flush;
  std::this_thread::sleep_for(500ms);
  std::cout << "o" << std::flush;
  std::this_thread::sleep_for(500ms);
}

This does the job, but imagine if I want to print a long text; it will take many lines of code and I'm sure there must be an easy way, just like in Python.

Answer 1

The modern approach in C++ is to use std::string and loop over the elements with a for-loop:

void slow_print(std::string str) {
    using namespace std::chrono_literals;

    for (const auto& i : str) {
        std::cout << i << std::flush;
        std::this_thread::sleep_for(500ms);
    }
}

Example usage:

int main() {
    slow_print("Hello");
}