3
votes
Accepted
pset1 cash.c guidance
That single ; after your while is an empty statement, and in the code you show it is the loop's body. So your loop keeps doing nothing, and repeat that. Remove that extra semicolon. Semicola are meant ...
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2
votes
"cash.c:7:1: error: expected identifier or '('" What do I do?
Get rid of the semicolon on line 6.
A semicolon there marks the line as a function signature. You'll learn more about that later.
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2
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make: *** No rule to make target 'cash'. Stop
You gotta change your directory to where cash.c is located. cd pset1
2
votes
Accepted
CS50 problem set 1 cash
Try printing out the value of cents after each calculation and think about the effect of integer division vs. regular division.
Does the code track BOTH the number of coins for each denomination AND ...
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1
vote
Accepted
Code not working - cash
The problem is that the code uses do/while loops when it should have used while loops.
A do/while loop will ALWAYS run at least once. That means that it will add 4 coins and subtract at least 25 cents,...
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1
vote
Accepted
CS50 pset 1 cash problem: keep getting 1 as answer
The problem that you're seeing is here:
quantity = round (quantity * 100);
So, what is the value of quantity before this line execute?
What variable actually contains the value of the change to be ...
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1
vote
Accepted
cash CS50 2020 pset1 modulo
Why are you using modulo for this? It produces an unreliable result in this usage. Further, the actual numbers don't make sense.
The modulo function returns the remainder after an integer division. ...
- 68.1k
1
vote
Accepted
Why removing a printf function messes up with my code? CS50 pset1 cash greedy challenge
Could it be the missing line break? The output of
printf("Your input: $ %.2f", a);
printf(", which amounts to %i total.\n", cents);
or equivalently
printf("Your input: $ %.2f, which amounts to %i ...
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1
vote
Accepted
I need help. (pset 1 - cash) I don't get this!
Why does the code increment the amount of change, i, each time it subtracts the value of a coin from it? You should be using a separate variable to track the number of coins.
- 68.1k
1
vote
Accepted
I don't understand where I went wrong?
By definition, the function named main does not require a return. From this doc
If the returned type is compatible with int and control reaches the
terminating }, the value returned to the ...
- 27.8k
1
vote
Accepted
Transform function into a loop or similar
Its good that you're thinking about how to make the code more efficient. Kudos to you!
Yes, repeating code is a red flag that things can be simplified. But here, the code is very similar but not the ...
- 68.1k
1
vote
Accepted
PSet1 cash, modulo problem
Welcome to the world of (binary) floating point. A value like 4.2 cannot be precisely represented in binary, it would be represented by an infinite sequence of binary digits. Obviously we don't have ...
- 20.9k
1
vote
Accepted
pset1 cash.c check50 outputs 1 error?
You already understand all the parts of what's happening. Time to put them all together.
The round function always rounds at the decimal. It's a simple fix. Move the decimal before you round. Don't ...
- 68.1k
1
vote
Accepted
pset1 cash.c Do While loop executing even when condition = false?
It's doing exactly what it was told. Remember the differences between a while loop and a do/while loop. A while loop can only execute if the condition is true because the test condition is checked ...
- 68.1k
1
vote
Accepted
how to carry over value of int through while loops (cash/less)
You have changed to using cents, but quarter and so on are still in dollars.
Variables like count, declared in the function, not globally, are not initialised by default, so start at any value (maybe ...
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