Can anyone points out what is wrong with my code? Determine the total price of the products purchase and possible change

Question

So I far, I’ve gotten a lot of issues with this program I need the possible output to be correct:

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Enter product1 price:
Enter product2 price:
Enter the amount to pay:
Total price:
Change if there is:

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What I have tried, yet

#include <iostream>
using namespace std;
int main(){
int product1;
int product2;
int amount_to_pay;
int total_price;
int change;
cout<<"Product1: "<<endl;
cin>>product1;
cout<<"Product2: "<<endl;
cin>>product2;
cout<<"Enter the amount to pay: "<<amount_to_pay;
cin>>amount_to_pay;
total_price=product1+product2;
cout<<"Total price: "<<total_price<<endl;
change=amount_to_pay-total_price;
cout<<"Your change: "<<change<<endl;
return 0;
}

Which brought alot of errors like the integer point when calling the output text “amount_to_pay”

Answer 1

Something like this ...

// prompt and read value for <product1> and <product2>
total_price = product1 + product2;
cout << "Total price: " << total_price << endl;
do
{
cout << "Enter the amount to pay: " << endl;
cin >> amount_to_pay;
if( amount_to_pay < total_price )
{
cout << "Not enough money." << endl;
}
} while( amount_to_pay < total_price );
change = amount_to_pay - total_price;
if( change > 0 )
{
cout << "Your change: " << change << endl;
}

Answer 2

cout << "Enter the amount to pay:" << amount_to_pay;

Here you are printing <amount_to_pay> when in fact you haven't read its value. Remove <amount_to_pay> and replace it with `endl` the way you wrote other input prompt.

Answer 3

But you don't have to print it when prompting user. Look at other input prompt, none showed their respective variable ...

Answer 4

That’s the main thing, I want to print the amount to pay to prompt the user their amount of payment values

Answer 5

Ok, your suggestion work but how can I make the program only output and input positive values everywhere? Since negative “change” is not a real thing in the real world if I input product1=20 and product2=30 then I get a total of price=50 but now I get a negative change of -20

Answer 6

And the “amount to pay value” should always be greater than prod1 and prod2 otherwise it wouldn’t make any sense

Answer 7

I’m thinking of a different track instead, should I use switch case or loop?

Answer 8

switch case is conditional (decision making)
loop is repetition
They are no comparison ...

Answer 9

Please can you show me how this work?

Answer 10

Show you what?

Answer 11

How can I use the conditional and the loop for this to work

Answer 12

That's where conditionals come handy. You check whether <amount_to_pay> was greater or equal to <total_price>. If the check fails, you know the money wasn't even enough, and no change was in order ...

You can even use a loop to continue prompting and reading <amount_to_pay> while the given value wasn't enough to complete the transaction.