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money-printer.cpp
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money-printer.cpp
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#include <iostream>
#include <vector>
#include "math.h"
using namespace std;
class Denomination{
public:
double value;
int count;
Denomination(double value) : value(value), count(0){};
};
class DenominationSplitter{
private:
vector<Denomination> denominations;
public:
void addDenomination(Denomination d);
void printDenominations();
void printLeastDenominations(double amount);
double round(double number);
void checkResult(double amount);
};
void DenominationSplitter::addDenomination(Denomination d){
this->denominations.push_back(d);
}
void DenominationSplitter::printDenominations(){
for(int i =0; i < denominations.size();i++){
cout << denominations[i].value << endl;
}
}
void DenominationSplitter::printLeastDenominations(double amount){
cout << "The value for counting is £" << amount << endl;
for(int i =0; i < denominations.size(); i++){
double amountCopy = amount;
// Figure out the number of times the denomination is present in the amount.
while(amountCopy >= 0){
amountCopy = round(amountCopy);
amountCopy -= denominations[i].value;
denominations[i].count++;
}
// we are always going to go at least one over with the minus values so we decrement the count here
if(denominations[i].count != 0)denominations[i].count--;
amount -= denominations[i].count * denominations[i].value;
printf("Number of £%.2f's -> %i \n",denominations[i].value, denominations[i].count);
}
}
double DenominationSplitter::round(double number){
double value = (int)(number * 100 + .5);
return (double)value / 100;
}
void DenominationSplitter::checkResult(double amount){
double total = 0.0;
// calculate the total from the denominations vector
for(vector<Denomination>::iterator it = begin(denominations); it != end(denominations); ++it){
total += it->value * it->count;
}
if(total == amount){
cout << "CORRECT! The denomination counts add up! => " << total << endl;
}
else{
cout << "WRONG! The counts don't add up! => " << total << endl;
}
}
int main(){
DenominationSplitter ds;
ds.addDenomination(Denomination(50));
ds.addDenomination(Denomination(20));
ds.addDenomination(Denomination(10));
ds.addDenomination(Denomination(5));
ds.addDenomination(Denomination(2));
ds.addDenomination(Denomination(1));
ds.addDenomination(Denomination(0.5));
ds.addDenomination(Denomination(0.2));
ds.addDenomination(Denomination(0.1));
ds.addDenomination(Denomination(0.05));
ds.addDenomination(Denomination(0.02));
ds.addDenomination(Denomination(0.01));
// ds.printDenominations();
ds.printLeastDenominations(68.02);
ds.checkResult(68.02);
return 0;
}