*C++ the sample solution as follows: Purpose: You are given a certain amount of
ID: 645111 • Letter: #
Question
*C++
the sample solution as follows:
Purpose: You are given a certain amount of money, and you are tasked with
buying the meal wigh most Vitamin C with that amount.
*/
#include
#include
#include
#include
using namespace std;
int main (void) {
// Variables
double aTotal, aDrink, aFood, // Will hold the amount of money available
costDrink, costFood,
mostExpensiveMeal,
bestVC, // The meal combination with the most vitamin C
bestComboFood,
bestComboDrink;
int calFood,
calDrink,
vcFood,
vcDrink,
leastCalories,
greatestVC,
totalVC = 0,
cal650Count = 0,
mealCount = 0,
iFor,
iMax;
// Sentinel loop. Exit if amount to spend is zero.
for (;;) {
// Input amount to spend
for (;;) {
cout << "Please enter the total amout of money you wish to spend on Food & Drinks:";
cin >> aTotal ;
if ( aTotal < 0) {
cout << "Error: amount must be positive" << endl;
}
else if ( aTotal > 35 ) {
cout << "Error: maximum amount you may spend is $35" << endl;
}
else {
break;
}
}
if ( aTotal == 0 ) {
break;
}
iMax=int(aTotal/0.05 + 0.001);
// Now loop through all the possible values to determine the best meal
for ( iFor = 0 ; iFor <= iMax ; iFor++ ) {
aFood=iFor*0.05;
aDrink = aTotal - aFood;
// Go through the list of possible drinks
// From most expensive to least
// Process valid money amounts
if (aDrink >= 8.99) {
// OJ with Carrots & Spinach, for $8.99";
vcDrink = 236;
} else if (aDrink >= 4.99) {
// OJ, for $4.99";
vcDrink = 207;
} else if (aDrink >= 3.50) {
// Asparagus Milkshake, for $3.50";
vcDrink = 50;
} else if (aDrink >= 2.50) {
// Strawberry Milkshake, for $2.50";
vcDrink = 149;
} else if (aDrink >= 1.75) {
// Tea, for $1.75";
vcDrink = 7;
} else if (aDrink >= 1.25) {
// Water, for $1.25";
vcDrink = 0;
} else if (aDrink >= 0.95) {
// Coffee
vcDrink = 0;
} else if (aDrink >= 0.25) {
// Pop
vcDrink = 0;
} else {
// You cannot afford any drink";
vcDrink = 0;
} // end if selecting the most expensive meal
// Process valid money amounts
if (aFood >= 24) {
// Steak & Broccoli, for $24.00";
vcFood = 148;
} else if (aFood >= 14.99) {
// Veggie Platter, for $14.99";
vcFood = 30;
} else if (aFood >= 6.75) {
// Submarine Sandwich, for $6.75";
vcFood = 9;
} else if (aFood >= 3.50) {
// Pepperoni Pizza, for $3.50";
vcFood = 6;
} else if (aFood >= 2.50) {
// All dressed Hamburger, for $2.50";
vcFood = 12;
} else if (aFood >= 1.00) {
// Doughnuts, for $1.00";
vcFood = 2;
} else if (aFood >= 0.35) {
// Noodle soup, for $0.35";
vcFood = 0;
} else {
// cout << "You cannot afford any food";
vcFood = 0;
} // end if
if ( aFood == 0 || bestVC < (vcFood + vcDrink) ) {
bestVC = vcFood + vcDrink;
bestComboFood = aFood;
bestComboDrink = aDrink;
}
}
// Now Print the best solution:
aFood = bestComboFood;
aDrink = bestComboDrink;
if (aDrink >= 8.99) {
cout << "We recommend you purchase an OJ with Carrots & Spinach, for $8.99";
costDrink = 8.99;
calDrink = 101;
vcDrink = 236;
} else if (aDrink >= 4.99) {
cout << "We recommend you purchase an OJ, for $4.99";
costDrink = 4.99;
calDrink = 112;
vcDrink = 207;
} else if (aDrink >= 3.50) {
cout << "We recommend you purchase an Asparagus Milkshake, for $3.50";
costDrink = 3.50;
calDrink = 203;
vcDrink = 50;
} else if (aDrink >= 2.50) {
cout << "We recommend you purchase a Strawberry Milkshake, for $2.50";
costDrink = 2.50;
calDrink = 250;
vcDrink = 149;
} else if (aDrink >= 1.75) {
cout << "We recommend you purchase a Tea, for $1.75";
costDrink = 1.75;
calDrink = 2;
vcDrink = 7;
} else if (aDrink >= 1.25) {
cout << "We recommend you purchase a Water, for $1.25";
costDrink = 1.25;
calDrink = 0;
vcDrink = 0;
} else if (aDrink >= 0.95) {
cout << "We recommend you purchase a Coffee, for $0.95";
costDrink = 0.95;
calDrink = 0;
vcDrink = 0;
} else if (aDrink >= 0.25) {
cout << "You could purchase a Pop, for $0.25";
costDrink = 0.25;
calDrink = 160;
vcDrink = 0;
} else {
cout << "You cannot afford any drink";
costDrink = calDrink = vcDrink = 0;
} // end if selecting the most expensive meal
cout << endl;
if (aFood >= 24) {
cout << "We recommend you purchase Steak & Broccoli, for $24.00";
costFood = 24;
calFood = 300;
vcFood = 148;
} else if (aFood >= 14.99) {
cout << "We recommend you purchase an Veggie Platter, for $14.99";
costFood = 14.99;
calFood = 80;
vcFood = 30;
} else if (aFood >= 6.75) {
cout << "We recommend you purchase an Submarine Sandwich, for $6.75";
costFood = 6.75;
calFood = 200;
vcFood = 9;
} else if (aFood >= 3.50) {
cout << "We recommend you purchase a Pepperoni Pizza, for $3.50";
costFood = 3.50;
calFood = 250;
vcFood = 6;
} else if (aFood >= 2.50) {
cout << "We recommend you purchase an all dressed Hamburger, for $2.50";
costFood = 2.50;
calFood = 301;
vcFood = 12;
} else if (aFood >= 1.00) {
cout << "We recommend you purchase a Doughnuts, for $1.00";
costFood = 1;
calFood = 452;
vcFood = 2;
} else if (aFood >= 0.35) {
cout << "We recommend you purchase a Noodle soup, for $0.35";
costFood = 0.35;
calFood = 436;
vcFood = 0;
} else {
cout << "You cannot afford any food";
costFood = calFood = vcFood = 0;
} // end if
cout << endl;
// Gather statistics
if (costFood+costDrink > 0) {
cout << "This meal would cost $" << costFood+costDrink
<< ", with " << calFood+calDrink
<< " Calories and " << vcFood+vcDrink
<< "% of the daily required Vitamin C" << endl;
cout << endl;
mealCount++;
if ( mealCount == 1 || mostExpensiveMeal < (costFood+costDrink) ) {
mostExpensiveMeal = costFood+costDrink;
}
if ( mealCount == 1 || leastCalories > (calFood+calDrink)) {
leastCalories = calFood+calDrink;
}
totalVC += vcFood + vcDrink;
if ( mealCount == 1 || greatestVC < (vcFood+vcDrink)/(costFood+costDrink) ) {
greatestVC = (vcFood+vcDrink)/(costFood+costDrink);
}
if ( calFood+calDrink > 650) {
cal650Count++;
}
}
} // End of sentinal loop.
if (mealCount > 0) {
cout << "The most expensive meal costs: $" << mostExpensiveMeal
<< endl;
cout << "The meal with the least calories had: "
<< leastCalories << " calories"
<< endl;
cout << "The average vitamin C per meal was: " << totalVC/mealCount
<< endl;
cout << "The most econmical source of 'C' was: " << greatestVC << "%/dollar"
<< endl;
cout << 100*cal650Count/mealCount << "% of the meals had more than 650 calories."
<< endl;
}
system("PAUSE"); return 0;
}
---------------------------------------------------------------------------------------------------------------------------------------
***You are to add four functions to your program. The function prototypes are below. You must follow these prototypes exactly.
// getMaxDollars()
// (1) Requests the user the amount of money they want to spend
// (2) If the values are not valid, has the user
// try again, until a value in the range desired is
// entered
// Returns: the maximum dollars to spend.
//
double getMaxDollars( void );
// fequals() tests if two floating point values are (approximately) equal
//
// Returns: true if ||b-a|| < 0.0001
// false otherwise
bool fequals( double a , double b );
// selectFood()
// Selects a food choice, given a maximum amount of money, but
// does not print anything.
// Returns: cost of most expensive food that could be bought for
// the given 'amount'
// Also populates/"returns" the vitamin-C, and calories for the selection
double selectFood( double amount, int &vcFood, int &calFood );
// selectDrink()
// Selects a drink choice, given a maximum amount of money, but
// does not print anything.
// Returns: cost of most expensive drink that could be bought for
// the given 'amount'
// Also populates/"returns" the vitamin-C and calories for the
// selected drink
double selectDrink( double amount, int &vcDrink, int &calDrink );
You are provided with two other functions, printDrink() and printFood(), both that use the fequals() function you will provide:
// Prints the name of the drink selected, for a given dollar value.
// This function should use the fequals() function defined above
// The function only prints the food (e.g. "a Strawberry Milkshake")
// so that the same function can be used in a table and elsewhere.
void printDrink( double amount ) {
if ( fequals( amount, 8.99)) {
cout << "OJ with Carrots & Spinach";
} else if ( fequals( amount, 4.99)) {
cout << "an OJ";
} else if ( fequals( amount, 3.50)) {
cout << "an Asparagus Milkshake";
} else if ( fequals( amount, 2.50)) {
cout << "a Strawberry Milkshake";
} else if ( fequals( amount, 1.75)) {
cout << "a Tea";
} else if ( fequals( amount, 1.25)) {
cout << "a Water";
} else if ( fequals( amount, 0.95)) {
cout << "a Coffee";
} else if ( fequals( amount, 0.25)) {
cout << "a Pop";
} else {
cout << "no drink";
} // end if selecting the most expensive meal
}
// Prints the name of the food selected, for a given dollar value.
// This function uses the fequals() function defined above
// The function should only print the food (e.g. "a Hamburger")
// so that the same function can be used in a table or
// as in an output string.
void printFood( double amount ) {
if ( fequals( amount, 24.00 ) ) {
cout << "Steak & Broccoli";
} else if ( fequals( amount, 14.99)) {
cout << "a Veggie Platter";
} else if ( fequals( amount, 6.75)) {
cout << "a Submarine Sandwich";
} else if ( fequals( amount, 3.50)) {
cout << "a Pepperoni Pizza";
} else if ( fequals( amount, 2.50)) {
cout << "an all dressed Hamburger";
} else if ( fequals( amount, 1.00)) {
cout << "a Doughnut";
} else if ( fequals( amount, 0.35)) {
cout << "a Noodle soup";
} else {
cout << "no food";
} // end if
}
You are to change your main program so that you add the printDrink()and printFood()
functions, and implement the getMaxDollars(), fequals(), selectFood() and selectDrink() functions described above. You should remove the corresponding code from the main() body, and use these functions instead.
For each iteration of $0.05, call "selectFood( )
Explanation / Answer
#include
#include
double drinkprice, foodprice,totalprice;
int vcDrink,vcFood,vcTotal;
string food,drink;
void drink(int no)
{ switch(no)
{case 1: drink =
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