Good afternoon guys,

I am reaching out for help on C++. I just started the semester taking the Computer programming 1 at my college which is taught in C++. I am working on a chapter project qusetion and I feel lost on how to achieve the solution using the basic knowledge on Chapter 3 so far. The book we are using is Problem solving with CPP 10th Edition. And here is the question:

1. Write a program that computes the cost of a long-distance call. The cost of
the call is determined according to the following rate schedule:
a. Any call started between 8:00 am and 6:00 pm, Monday through Friday,
is billed at a rate of \$0.40 per minute.
b. Any call starting before 8:00 am or after 6:00 pm, Monday through
Friday, is charged at a rate of \$0.25 per minute.
c. Any call started on a Saturday or Sunday is charged at a rate of \$0.15
per minute.
The input will consist of the day of the week, the time the call started, and
the length of the call in minutes. The output will be the cost of the call. The
time is to be input in 24-hour notation, so the time 1:30 pm is input as
13:30
The day of the week will be read as one of the following pairs of character
values, which are stored in two variables of type char :
Mo Tu We Th Fr Sa Su
Be sure to allow the user to use either uppercase or lowercase letters or a
combination of the two. The number of minutes will be input as a value
of type int . (You can assume that the user rounds the input to a whole
number of minutes.) Your program should include a loop that lets the
user repeat this calculation until the user says she or he is done.

Here is my code so far, I was thinking of using enums so that the code will be able to identify the days of the week but I am kinda lost. As you can see as of now, I am just testing for Monday. However, I do not know how to make the code understand that the time starts from 8 AM to 6 PM. I can do 08:00 to 17:59. But to make to make it acknowledge 08:00 to 18:00 is rather hard since counting goes from 1 to 100. How can I create a simpler count from 1 - 60 as done with time ? I think if I can overcome this hurdle, then I can complete the code to work in how it works. Also, where can I use an enum?

``````// This program computes the cost of a long-distance call.
// Any call started between 8 am to 6 pm on Mon - Fri is billed @ \$0.40
// Any call starting between 6:01 pm to 7:59 am on Mon - Fri is billed @ \$0.25
// Any call started on a Saturday or Sunday is charged @ \$0.15

#include <iostream>
#include <ctime>
#include <string>
using namespace std;

// constants for the fixed costs
const double week_day = 0.40; // Mon - Fri from 8 am to 6 pm
const double week_nights = 0.25; // Mon to Friday 6:01 pm to 7:59 am
const double weekend = 0.25; // Saturday and Sunday rates
//enum days = {Monday = 'Mo', Tuesday = 'Tu', Wednesday = 'We', Thursday = 'Th', Friday = 'Fr', Saturday = 'Sa', Sunday = 'Su'};

int main(){
// Declaration of the variables to be used
int hour;
int hrs;
int minute;
int mins;
int call_mins;
string time_input;
string hour_part;
string minute_part;
char day_first;
char day_second;

cout << "Enter the time that the call was placed in 24-hour format eg. 13:30 for 1:30 PM: ";
cin >> time_input;
cout << endl << "You entered: " << time_input << endl;

// Break the time input to hour and minutes
//cout << time_input.find(':') <<endl;
//cout << time_input.find(':') << endl;
//cout << time_input.length() << endl;

if ((time_input.find(':') < time_input.length()) && time_input.length() == 5) {
hour = stoi(time_input.substr(0, time_input.find(':'))); // from str[0] to where : is found
minute = stoi(time_input.substr(time_input.find(':') + 1)); // from : to str[str.length()]
//cout <<"hours:"<<hours<<endl; // check for whether break was successful
//cout<<"mins:"<<minutes<<endl; // check for whether break was successful

// Nested if statements to make sure that our user's input falls into the normal time format
if ((hour >= 0 && hour <=24) && (minute >= 0 && minute <= 59)){
cout << hour << endl;
cout << minute << endl;
cout << endl;

// If it does, ask the user to enter the length of the call
// Lets ask the user for the number of minutes that the call lasted.
cout << "How long was the call (in minutes)?: ";
cin >> call_mins;
cout <<endl << "You entered " << call_mins << " minutes" <<endl<<endl;
}
else{
cout << "You entered an invalid input" << endl;
// Insert input loop here
}
}
else{
cout << "You entered an invalid input" << endl;

}
// Determine when the call took place
cout << "When did the call take place?: ";
cin >> day_first >> day_second;
day_first = tolower(day_first);
day_second = tolower(day_second);
//cout << "You entered " << day_first<<day_second;

// Here we are validating the day the call was made input
if (day_first == 'm' && day_second == 'o'){ // Weekday
cout << "Monday" << endl;
if ((hour >= 8 && minute  >= 0) && (hour <= 18 && minute <= 59)){

if (call_mins >= 60){
//  do{ // Fix this loop
hour = hour + (call_mins / 60);
minute = minute + (call_mins % 60);
while (minute >= 60){
cout << "start loop" << endl;
hour += minute / 60;
minute = minute % 60;
}
// } while (minute >= 60);
}
cout << "New hours: " << hour <<endl;
cout << "New minutes: " << minute <<endl;
cout << "Day shift"<< endl;

}
else if ((hour >= 18 && minute >= 01) && (hour <= { // Mostly lost here
cout << "night shift";
}
}

else if (day_first == 't'&& day_second == 'u'){ // Weekday
cout << "Tuesday" << endl;
}
else if (day_first == 'w' && day_second == 'e'){ // Weekday
cout << "Wednesday" << endl;
}
else if (day_first == 't' && day_second == 'h'){ // Weekday
cout << "Thursday" << endl;
}
else if (day_first == 'f' && day_second == 'r'){ // Weekday
cout << "Friday" << endl;
}
else if (day_first == 's' && day_second == 'a'){ // Weekend
cout << "Saturday" << endl;
}
else if (day_first == 's' && day_second == 'u'){ // Weekend
cout << "Sunday" << endl;
}
else{
cout << "The day input is invalid!!!";
}

return 0;
}``````

Thanks to everyone who will take the time to look at my code and contribute; and this is not homework, I am just trying to do all the chapter questions so that I have a strong grasp before moving to the next chapter.

One suggestion. Just like we do with dollars and cents, you should change your time to just full minutes to save constantly juggling hours and minutes.

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