5
votes
Accepted
Week 1 compiling String.c using clang instead of make
The make utility actually calls the clang compiler with special options that can be set for a project.
When I run make in the ide it actually runs the following:
clang -fsanitize=integer -fsanitize=...
- 812
3
votes
How should I take notes for the lectures?
you don't have to do that because there are already notes for each lecture in a PDF form which you can find under each lecture video in edX.
you may still want to take your own notes (maybe even on ...
2
votes
Accepted
Can't use get_long_long();
Does cs50.h have a function called get_long_long?. There is no function by that name listed in the CS50 Reference. And notice this from the spec:
Now, get_long itself will reject hyphens (and more) ...
- 27.8k
1
vote
Cs50 week 1 problem (make: *** [ ] Error 1)
Looks like an issue with the environment setup. I suggest you repeat all the steps outlined in the course on setting up the cs50 IDE.
- 68.1k
1
vote
Accepted
Can't seem to get total number of years to print properly in Lab 1
I see two serious problems here.
First, the print statement is inside the for loop, so you're going to print something on every pass through the loop, or nothing at all if the loop doesn't execute. ...
- 68.1k
1
vote
problem with credit with this numbers (369421438430814 & 5673598276138003)
I think you entered the wrong values when determining whether the credit card is Amex, Visa, or MasterCard.
For Mastercard, you typed in (credit_helper <= 56 && credit_helper >= 51). Try ...
- 11
1
vote
Accepted
Week 1 Credit; Not Creating Variable
The program is stuck in an infinite loop. Look at the while loop setup:
while(credit_number >= 0) // runs the loop until the credit card number is l
{
i = credit_number % 10; credit_number = ...
- 68.1k
1
vote
Accepted
how do i write pesudocode.txt for Mario? (less comfortable)
You make a new file by clicking the green plus sign at the top, next to where it says the name of the file you are currently on. On your keyboard, then do command shift S. It will give you options for ...
- 67
1
vote
Else If Boolean Statements of Equality In the Case of Complex Numbers
That example doesn't say what data type x and y are, but generally you can assume that numerical variables are real numbers in programming, unless specified otherwise.
There is a way to work with ...
- 744
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
Week 1 cash.c assignment: How can I get a variable to mutate as it gets operated on?
About the first error in line 10 , you cant declare a vatiable twice , you can only assign it more than once , so you need to delete the float type declaration which is inside the do while loop.
When ...
- 11
1
vote
Accepted
get_int variable in mario causing errors
It's an issue called variable scope, something that will be explained later. Simply put, a variable only exists within the surrounding pair of curly braces where it is created.
In Prof. Malan's ...
- 68.1k
1
vote
Accepted
Week 1: get_int & get_string errors
Solved!
I ran "update50" in the terminal twice, and after the second time a prompt came up that told me I'm currently running "pip 9.0.1" and there is an update available for "pip 10.0.1", and told ...
- 19
1
vote
Week 1: get_int & get_string errors
Your line numbers in code and in the error messages don't match, are off by one, so I'd guess you forgot to save, or compiled something else (another file, maybe of the same name in a different ...
- 20.9k
1
vote
Accepted
Switch(c) undeclared identifier
Simply put, c doesn't exist because it was never declared, and no value has been assigned to it. I could explain in detail, but the following site has already done it very nicely, including an ...
- 68.1k
1
vote
Can't compile adder from week 1
It's a syntax error. A comma is missing before the z in line 11.
- 68.1k
1
vote
1
vote
Last program from the first half of the lecture in week one?
Follow the link in the source code to the ioccc page. Follow some of the links to find out what it's all about. It's very cool. Then search the original page for "thad" (it's a winning entry from 2000)...
- 27.8k
1
vote
Accepted
Why does PrintName return void?
Good question. There is no requirement to capture a return value. Just because a function returns a value doesn't mean that the calling code needs to do anything with it. For many functions, like ...
- 68.1k
1
vote
why is no "\n" needed after GetString?
When you run this program, you indicate to the computer that you are finished entering your name by doing something. That "something" is where the new line in question comes from.
- 27.8k
1
vote
Accepted
CS50 Appliance compiling error!
Say you have written a program named example.c
First you compile your program like so
make example
Then you run it like so
./example
I tell you these because I see you have tried many times to do ...
- 7,366
1
vote
Accepted
Week 1 - Conditions - error expression result unused (expect ; at end of if else)
The if/else if/else conditions are used in the following way:
Single condition
if (condition)
{
// code to execute
}
Double condition
if (condition)
{
// code to execute
}
else
{
// ...
- 7,366
1
vote
Week 1 - Conditions - error expression result unused (expect ; at end of if else)
else is your last resort kind of command its like
if this then
{
do this
}
or
else if this then
{
do that
}
and finally when you cant think of any other condition you say you know what MR ...
- 169
Only top scored, non community-wiki answers of a minimum length are eligible