Question

6.32 LAB: Exact change - functions

Write a program with total change amount as an integer input that outputs the change using the fewest coins, one coin type per line. The coin types are dollars, quarters, dimes, nickels, and pennies. Use singular and plural coin names as appropriate, like 1 penny vs. 2 pennies.

Ex: If the input is:

0
or less, the output is:

no change
Ex: If the input is:

45
the output is:

1 quarter
2 dimes
Your program must define and call the following function. Positions 0-4 of coinVals should contain the number of dollars, quarters, dimes, nickels, and pennies, respectively.
void ExactChange(int userTotal, vector& coinVals)

Note: This is a lab from a previous chapter that now requires the use of a function.

this is my current ____________

#include
#include

using namespace std;

void ExactChange(int userTotal, vector& coinVals){
if(userTotal<=0){
cout << "no change" << endl;
return;
}
vector coinNameSingular = {"dollar", "quarter", "dime", "nickel", "penny"};
vector coinNamePlural = {"dollars", "quarters", "dimes", "nickels", "pennies"};
vector numCoins = {0,0,0,0,0};
int i = 0;
while(i<=3){
numCoins[i] = userTotal/coinVals[i];
userTotal %= coinVals[i];
i++;
}
numCoins[i] = userTotal;
for(i=0;i<4;i++){
if(numCoins[i]==1) cout << "1 " << coinNameSingular[i] << ""<< endl;
if(numCoins[i]>1) cout << numCoins[i] << " " << coinNamePlural[i] << "";
}
cout << endl;
}

int main(){
int userTotal;
vector coinVals = {100, 25, 10, 2, 1};


while(cin >> userTotal){

ExactChange(userTotal, coinVals);

}
}

Answer 1

Below is the desired C++ program for the problem. Do feel free to edit it according to your preference

Step-by-step explanation:

#include <iostream>

#include <vector>

using namespace std;

void ExactChange(int userTotal, vector<int> &coinVals) {

coinVals.reserve(5);

coinVals[0] = userTotal / 100;

userTotal %= 100;

coinVals[1] = userTotal / 25;

userTotal %= 25;

coinVals[2] = userTotal / 10;

userTotal %= 10;

coinVals[3] = userTotal / 5;

userTotal %= 5;

coinVals[4] = userTotal;

}

int main() {

vector<int> coins;

int value;

cin >> value;

if (value <= 0) {

cout << "no change" << endl;

} else {

ExactChange(value, coins);

if (coins[0] != 0) cout << coins[0] << " " << (coins[0] == 1 ? "dollar" : "dollars") << endl;

if (coins[1] != 0) cout << coins[1] << " " << (coins[1] == 1 ? "quarter" : "quarters") << endl;

if (coins[2] != 0) cout << coins[2] << " " << (coins[2] == 1 ? "dime" : "dimes") << endl;

if (coins[3] != 0) cout << coins[3] << " " << (coins[3] == 1 ? "nickel" : "nickels") << endl;

if (coins[4] != 0) cout << coins[4] << " " << (coins[4] == 1 ? "penny" : "pennies") << endl;

}

return 0;

}