CS50 Beta

Famous Question

 Famous Question
Question with 10,000 views. This badge can be awarded multiple times.
Awarded 71 times.
What's the point of the modulo operation in the Caesar cipher formula?
Awarded 2 days ago
Can Scratch backdrop be resized?
Awarded Jan 31 at 20:56
Getting an error error: expected identifier or '(' {
Awarded Jan 6 at 22:05
How are the problem sets graded?
Awarded Dec 31, 2022 at 10:42
How to quit when running into an infinite loop
Awarded Dec 25, 2022 at 12:36
How can I get the cs50.h to run in Visual Studio Code?
Awarded Nov 30, 2022 at 19:07
pointers and scanf : when do I use &x, *x or just x?
Awarded Nov 5, 2022 at 21:40
C: Vigenere - incompatible pointer types passing 'char **' to parameter of type 'const char *
Awarded Oct 17, 2022 at 3:21
Memory overlap in C
Awarded Oct 7, 2022 at 18:17
PSET5 compiles but gives: "free(): double free detected in tcache 2" error on testing
Awarded Sep 5, 2022 at 2:57
How to fix the `unused variable` error?
Awarded Aug 24, 2022 at 16:17
cs50 pset3 runoff tabulate
Awarded Jul 20, 2022 at 11:43
Getting "non-void function does not return a value in all control paths"
Awarded Jun 16, 2022 at 3:06
Error: incompatible integer to pointer conversion initializing 'int *' with an expression of type 'int'; take the address with &
Awarded May 27, 2022 at 10:31
Problem with importing Appliance into VMware Workstation
Awarded May 26, 2022 at 20:50
How do I fix the 'Invalid read of size 8' error from Valgrind for pset5?
Awarded Mar 21, 2022 at 14:55
incompatible pointer to integer conversion
Awarded Mar 17, 2022 at 3:15
pset1 Error: indirection requires pointer operand
Awarded Mar 10, 2022 at 3:42
"Expected Expression" error on else function in caesar.c
Awarded Mar 4, 2022 at 4:43
Conditional jump or move depends on uninitialised value(s)
Awarded Mar 2, 2022 at 16:18
Recover: Fatal error: glibc detected an invalid stdio handle
Awarded Oct 2, 2021 at 15:27
invalid read of size 1 -- Valgrind error
Awarded Sep 28, 2021 at 7:25
Finding the nth digit for credit card number
Awarded Jul 6, 2021 at 3:17
Undefined reference to `GetString'
Awarded Jun 30, 2021 at 8:35
(post deleted or otherwise unavailable)
Awarded Jun 28, 2021 at 22:02
What's the C equivalent for "string input = GetString();"
Awarded Jun 7, 2021 at 14:25
How do you pass arguments into GDB argv[1] argv[2]?
Awarded Mar 27, 2021 at 14:31
pset 3 GDB: "no executable file specified"
Awarded Mar 23, 2021 at 17:50
How much time, on the average, does it take to complete CS50 course?
Awarded Mar 2, 2021 at 4:46
'invalid read of size 8' given out by valgrind
Awarded Feb 14, 2021 at 23:50
Pset1 error: expected identifier or '('
Awarded Feb 1, 2021 at 1:26
How to convert the digits of a number into elements of array?
Awarded Nov 10, 2020 at 3:35
No Rule to Make Target
Awarded May 31, 2020 at 23:03
how do you convert ascii to alphabetical index
Awarded May 7, 2020 at 4:52
MARIO LESS COMFORTABLE
Awarded Apr 19, 2020 at 7:45
Question about binary search. Please help!
Awarded Mar 24, 2020 at 23:55
How to free a nested struct?
Awarded Mar 11, 2020 at 23:50
how to fix the "double free or corruption" error?
Awarded Feb 11, 2020 at 9:50
Life after CS50!
Awarded Dec 18, 2019 at 23:25
How to Wrap Around Array Indexes?
Awarded Dec 13, 2019 at 11:45
Struggle passing values from Python to HTML via Flask
Awarded Dec 6, 2019 at 6:25
how do you run the program on CS50 IDE I looked at the manual previously described,no help
Awarded Nov 15, 2019 at 12:40
How do I open a Terminal window in gEdit?
Awarded Nov 11, 2019 at 6:35
Problem with "expression result unused" error in for-loop
Awarded Oct 4, 2019 at 3:05
How to Start Studying CS50?
Awarded Sep 18, 2019 at 3:05
How to initialize multiple types of variables in a FOR loop?
Awarded Aug 2, 2019 at 12:55
Difference between char and char* in c
Awarded Jul 17, 2019 at 1:15
How to create an array/subarray by extracting a part of another array?
Awarded Jul 9, 2019 at 0:00
How do I install the CS50 library to my local OS?
Awarded Jun 28, 2019 at 23:40
How to get a value using flask, from a selected option in a drop down list?
Awarded Apr 15, 2019 at 1:25
Downloading cs50.h
Awarded Mar 23, 2019 at 4:45
How do I share a variable between source files in C with extern?
Awarded Mar 17, 2019 at 6:15
Help With PSET 1 - Mario!
Awarded Mar 9, 2019 at 16:45
implicit declaration of function is invalid in C99
Awarded Dec 26, 2018 at 23:40
How to fix the "failed to import appliance" error?
Awarded Nov 23, 2018 at 23:30
How to Fix the "expression result unused" Error?
Awarded Nov 14, 2018 at 20:20
How to solve "control may reach end of non void function" error
Awarded Nov 14, 2018 at 13:05
Why do I get an "undefined identifier" error even though the variable is defined in my code?
Awarded Sep 13, 2018 at 13:45
How to Use check50?
Awarded Sep 7, 2018 at 18:45
pset1 greedy.c problem
Awarded Aug 4, 2018 at 2:45
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