This lesson contains approximately 13 minutes of video content.

Activity Prompt:
##### Background

For some reason, the U.S. military has been getting their time as the number of hours (`double`) or as the number of minutes (`unsigned int`) as the time elapsed from 00:00. Your task as their software engineer is to convert these measurements to a more readable format. More specifically, your task is to implement an overloaded function to convert either of these inputs to military time. The military time displays the hour count (0-23 inclusive) followed by the minute count (0-59 inclusive). If either the hour count or minute count is less than 10 (i.e., a single digit), you will need to prepend a 0 to it in your final answer.

##### Assignment Prompt

You are tasked to write the function `ToMilitaryTime`, which converts a time measurement to the time in the day (24 hours). The measurements can be made in minutes passed as an `unsigned int` or in hours passed as a `double`. You should return the military time in the format `hh:mm`. If your minute and/or hour count is less than 10, you must prepend a 0 (i.e., 14:9 should be 14:09) as if reading the time on a digital clock displaying military time. For example, `ToMilitaryTime(8.4) -> "08:24"` and `ToMilitaryTime(389u) -> "06:29"`. When computing a time's minute component, round to the nearest minute since fractional minutes cannot be reported. You must do this using `round()` function(`#include <cmath>`). Since `round()` returns a `double` and you need an `std::string`, use `std::to_string`. Finally, if you are given input that falls out of the range of military time (i.e., an hour or minute count is less than 0 OR hour count is > 24.0 OR minute count > 1440), you will need to throw an exception.

##### Functions to Implement
``````std::string ToMilitaryTime(unsigned int num_mins);
// Example: ToMilitaryTime(389u) => "06:29" // notice that the argument must be an unsigned int.
// Example: ToMilitaryTime(844u) => "14:04"
// Example: ToMilitaryTime(1440u) => "00:00"

std::string ToMilitaryTime(double num_hours);
// Example: ToMilitaryTime(8.4) => "08:24"
// Example: ToMilitaryTime(14.4432) => "14:27"
// Example: ToMilitaryTime(24.0) => "00:00"
``````