2
votes
Accepted
Error: use of undeclared identifier 'j'
You did use an undeclared identifier j in the second for loop. It isn't created until and only inside the following 3rd for loop.
The compiler never lies. It might mislead on occasion, but it never ...
- 69.2k
2
votes
make: *** No rule to make target 'cash'. Stop
You gotta change your directory to where cash.c is located. cd pset1
1
vote
Accepted
The "Code Command" did not work for me in "code mario.c" - August 28th, 2022
It looks like you are on ide.cs50.io. That platform is being sunsetted (retired) so you should move to the current platform. The code command is used on VS Code (the current platform) and can be ...
- 28.6k
1
vote
Does somebody explain %d, %s, etc
These characters are used as "wildcards" or placeholders. They are used in conjunction with something like printf().
Very basic example
//declaring an int variable to a value of 5
int x = 5;
...
- 11
1
vote
Accepted
Does somebody explain %d, %s, etc
printf formatting is a language unto itself. This document helped me a lot. Hope you find it useful.
- 28.6k
1
vote
Accepted
I have a problem regarding " Condition"
You cannot compare strings in C to compare strings you must use a function called strcmp()if I remember correctly it should be in the string.h so just #include <string.h> and you should be able ...
- 731
1
vote
Accepted
Trying to do pset 2, but it doesn't even accept my input. What am I doing wrong?
The problem lies here:
for(int i = 0; i < keyL - 1; i++)
{
for(int j = i; j < keyL; j++)
{
if(key[i] == key[j])
return 0;
}
}
When the loop runs the first time, ...
- 69.2k
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
Syntax Highlighting Error
Just a guess, did you open a new file that has yet to be named or saved?
Assuming you're in the CS50 IDE, are you writing your code in a file with the .c extension? The IDE has to see that extension ...
- 69.2k
1
vote
Why is the value 16,432 appearing, and why is it getting reduced each time I run the program?
Local variables are not initialised by default. The values you find there are the remains of other variables (or data related to function calls) that occupied that exact same location of the stack ...
- 21k
1
vote
pset6 - greedy doesn't print answer- just returns the input. Where have I gone wrong?
if n >= 0:
break
This breaks you out of the While loop, so your program simply ends if the user gives you a positive number.
- 18.7k
1
vote
Credit Card Test Confusion
Taking the first one through the example in the spec:
3 7 1 4 4 9 6 3 5 3 9 8 4 3 1
Okay, let’s multiply each of the underlined bold digits by 2
7*2 + 4*2 + 9*2 + 3*2 + 3*2 + 8*2 + 3*2
That ...
- 28.6k
1
vote
why doesnt this code print the number of bottles of water used? it only stops after prompting user for number of minutes
Right now your code is just printing m, bottles is only defined, it is never called.
If you want to declare a variable, but not initialize it, int b; is what you would write. int b = b; assigns a new ...
- 1,223
1
vote
Problem with format codes
The short answer is that you're using the wrong format code. While you can cast the values and make it work, it would be easier to just use the correct code, %lu, for an unsigned long. google printf ...
- 69.2k
1
vote
Problem with format codes
It is because your Compiler warnings are ON. The return type of sizeof() function is size_t. It is System and Compiler dependant. May be if you Compiler your code on 32 bit machine, it will have ...
- 549
1
vote
Help with pset1 mario, I don't understand what's wrong with my code
Your loops mean that you don't print out the right number of # signs. Because your i starts of at 0, on the first pass j = 0 which equals i and so only one pass is printed.
Therefore you need to ...
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