Question

a C++ 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 A.M. and 6:00 P.M., Monday through Friday, is billed at a rate of $0.40 per minute.

b. Any call starting before 8:00 A.M. or after 6:00 P.M., 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 P.M. is input as (must be the following format:)
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.

Format your output to two decimal places.

Define the following functions (value returning functions, Cally-by-Value):

validateUserInputTime(): validates the user's time input (hours and minutes should be positive numbers only including zero), and returns TRUE or FALSE.

validateUserInputDay(): validates the user's day input (only characters are allowed: Mo Tu We Th Fr Sa Su), and returns TRUE or FALSE. Allow uppercase and lowercase input.

validateUserInputCallLength(): validates the user's call length input (only positive integers are allowed), and returns TRUE or FALSE.

calculateTotalCost(): calculate the total cost of a call, and returns the total cost.

OUTPUTS:

**************************************************************************************

Enter the time the call starts in 24-hour rotation:
-13:10

Invalid time input.

Please try again.

Enter the time the call starts in 24-hour rotation:

**************************************************************************************

Enter the time the call starts in 24-hour rotation:
a:77

Invalid time input.

Please try again.

Enter the time the call starts in 24-hour rotation:

**************************************************************************************

Enter the time the call starts in 24-hour rotation:
13:10

Enter the first two letters of the day of the week:
ss

Invalid day input.

Please try again.

Enter the first two letters of the day of the week:

**************************************************************************************

Enter the time the call starts in 24-hour rotation:
13:10

Enter the first two letters of the day of the week:
1s

Invalid day input.

Please try again.

Enter the first two letters of the day of the week:

**************************************************************************************

Enter the time the call starts in 24-hour rotation:
13:10

Enter the first two letters of the day of the week:
Mo

Enter the length of the call in minutes:
-10

Invalid minute input.

Please try again.

Enter the length of the call in minutes:

**************************************************************************************

Enter the time the call starts in 24-hour rotation:
13:10

Enter the first two letters of the day of the week:
Mo

Enter the length of the call in minutes:
a1

Invalid minute input.

Please try again.

Enter the length of the call in minutes:

**************************************************************************************

Enter the time the call starts in 24-hour rotation:
13:10

Enter the first two letters of the day of the week:
Mo

Enter the length of the call in minutes:
10

Cost of the call: $4.00

Do you want to repeat the program?
y

**************************************************************************************

Enter the time the call starts in 24-hour rotation:
20:10

Enter the first two letters of the day of the week:
Fr

Enter the length of the call in minutes:
10

Cost of the call: $2.50

Do you want to repeat the program?
y

**************************************************************************************

Enter the time the call starts in 24-hour rotation:
10:10

Enter the first two letters of the day of the week:
Su

Enter the length of the call in minutes:
10

Cost of the call: $1.50

Do you want to repeat the program?
n

Answer 1

#include<iostream>

#include<string>

#include<sstream>

using namespace std;

//declaration of all functions

bool validatevalidateUserInputTime(string time);

bool validateUserInputDay(char a, char b);

bool validateUserInputCallLength(int minute);

float calculateTotalCost(string time, char a, char b, int minute);

int main() {

string time;

char a, b;

int minute;

char choice = 'y';

while (choice == 'y') {

cout << "**************************************************************************************" <<endl ;

cout << "Enter the time the call starts in 24-hour rotation:\n";

cin >> time;

if (!validatevalidateUserInputTime(time)) {

cout << "Invalid time input\n";

cout << "Please try again\n\n";

continue;

}

cout << "Enter the first two letters of the day of the week:\n";

cin >> a >> b;

if (!validateUserInputDay(a,b)) {

cout << "Invalid day input\n";

cout << "Please try again\n\n";

continue;

}

cout << "Enter the length of the call in minutes:\n";

cin >> minute;

if (!validateUserInputCallLength(minute)) {

cout << "Invalid minute input\n";

cout << "Please try again\n\n";

continue;

}

cout << "Cost of the call: $" << calculateTotalCost(time, a, b, minute) << endl;

cout << "Do you want to repeat the program ? (y/n)" << endl;

cin >> choice;

}

return 0;

}

bool validatevalidateUserInputTime(string time) {

//NOTE

//inorder to use string correctly, there is a new data type size_t already defined for string class

//don't bother much about it

//it is an unsigned int type which is specially defined for storing size

size_t pos;

//find is a prdefined function for string class and below it will return position of : in time string

//i will then sepearte time and minute to check it's validity

pos = time.find(':');

if (pos != string::npos) {

string hour, minute;

hour = time.substr(0, pos); //sepearting hour

minute = time.substr(++pos); //separating minute

//NOTE: we are using string stream class technique to convert string into integer so that we can compare it range

stringstream ss(hour);

int int_hour, int_minute;

ss >> int_hour; //converted to integer you can use your own technique

ss.str("");

ss.clear();

ss << minute;

ss >> int_minute;

if ((int_hour >= 0 && int_hour <= 24) && (int_minute >= 0 && int_minute <= 60)) //comparing range of entered time

return true;

else

return false;

}

else

return false;

}

bool validateUserInputDay(char a, char b) {

string str;

str.push_back(a);

str.push_back(b);

//trying all possible formate of date

if (str == "mo" || str == "Mo" || str == "mO" || str == "MO" ||

str == "tu" || str == "Tu" || str == "tU" || str == "TU" ||

str == "we" || str == "We" || str == "wE" || str == "WE" ||

str == "th" || str == "Th" || str == "tH" || str == "TH" ||

str == "fr" || str == "Fr" || str == "fR" || str == "FR" ||

str == "sa" || str == "Sa" || str == "sA" || str == "SA" ||

str == "su" || str == "Su" || str == "sU" || str == "SU" ) {

return true;

}

else {

return false;

}

}

bool validateUserInputCallLength(int minute) {

//here i considered 0 also if u dont want then write code in if as minute > 0

if (minute >= 0)

return true;

else

return false;

}

float calculateTotalCost(string time, char a, char b, int minute) {

//this part of code is for extracting hour and minute same as above

size_t pos;

pos = time.find(':');

string hr, mn;

hr = time.substr(0, pos);

mn = time.substr(++pos);

stringstream ss(hr);

int int_hour, int_minute;

ss >> int_hour;

ss.str("");

ss.clear();

ss << minute;

ss >> int_minute;

//knowing the entered day

string day;

day.push_back(a);

day.push_back(b);

float cost = 0;

if (day == "sa" || day == "sA" || day == "Sa" || day == "SA" ||

day == "su" || day == "sU" || day == "Su" || day == "SU" ) {

cost = minute * .15;

return cost;

}

else {

if (int_hour >= 8 && int_hour < 18) {

cost = minute * .40;

return cost;

}

else {

cost = minute * .25;

return cost;

}

}

}

//if you are unable to understand any part of code then please comment

//I will respond as soon as i can

//thanks

//sample output