Questions tagged [compilation-error]
The compilation-error tag has no usage guidance.
64
questions
0
votes
1
answer
60
views
cs50 - prime: compiling error understanding
I was trying to understand what I missed in this code.
It should loop through the numbers to the current one and confirm whether it is a prime number.
#include <cs50.h>
#include <stdio.h>
...
- 13
1
vote
2
answers
1k
views
check50 error message when testing test_fuel.py
:) test_fuel.py exist
:( correct fuel.py passes all test_fuel checks
expected exit code 0, not 2
:| test_fuel catches fuel.py returning incorrect ints in convert
can't check until a frown ...
- 11
0
votes
1
answer
17
views
cs50 make mario Hello I'm new to cs50 course when doing make mario i got this error
#include <cs50.h>
#include <stdio.h>
int main(void)
{
int n;
do
{
n = get_int("Width: ");
}
While (n < 1);
for (int i = 0; i < 4; i++)
...
1
vote
2
answers
69
views
PSet1 - Coins issue
While doing the Coins problem set, I am receiving an error while trying to compile and I can't figure out what the issue is.
"cash.c:53:27: error: variable 'cents' used in loop condition modified ...
- 11
0
votes
1
answer
735
views
incompatible integer to pointer conversion initializing 'char *' with an expression of type 'int'
I keep getting this error when I try to compile my program: incompatible integer to pointer conversion initializing 'char *' with an expression of type 'int'
{
if (argc != 2)
{
printf(&...
- 3
0
votes
2
answers
81
views
pset1 mario (less comfortable), expression error
I keep getting 'expression error' when I try to compile my code; any help would be appreciated. Code is as follows:
#include <stdio.h>
#include <cs50.h>
int main(void)
{
// prompt ...
- 5
-1
votes
1
answer
48
views
Do I need to install any compiler for compiling a C program in cs50 sandbox? If not then why am I not being able to compile my program?
I am new to programming and has basicly started with c program but after i write a code and try to compile it by,"make untitled1" I get an error message.
- 3
0
votes
1
answer
170
views
PSET5 Compiling issue
So I finally finished my code and received 20 errors when attempting to compile, after my first attempt fixing the errors I tried again and received 15 errors, once more and received 17, and now am ...
- 79
0
votes
1
answer
99
views
Readability compiling issue
Readability (Problem Set 2)
#include <stdio.h>
#include <cs50.h>
#include <string.h>
#include <ctype.h>
#include <math.h>
// Letters detects letters
// Words detects ...
- 17
0
votes
1
answer
35
views
Expected expression on "valid triangle" exercise? i thought the 'or' symbol was 2 lines ( || ) what have i done wrong here?
#include <stdio.h>
#include <cs50.h>
#include <string.h>
#include <ctype.h>
#include <math.h>
// PROTOTYPE THE FUNCTON
bool valid_triangle(float input1, float input2, ...
- 36
0
votes
2
answers
35
views
Can anyone tell me what ive done wrong and breakdown how to properly prototype and deploy created functions?
code:
#include <stdio.h>
#include <cs50.h>
#include <string.h>
#include <ctype.h>
#include <math.h>
// PROTOTYPE THE FUNCTONS & DECLARE VARIABLES
int multiply(int ,...
- 36
0
votes
1
answer
856
views
initializer element is not a compile-time constant and expected identifier or '(' errors
I used the CS50 IDE for C on cloud9. When I run the program I get the errors
3:8: warning: **implicit declaration of function 'GetInt' is invalid in C99 [-Wimplicit-function-declaration] int x= ...
- 7
0
votes
2
answers
2k
views
Pset 4 filter: reflect help
I have been stuck on pset4 for a while and when I try to compile my code I now get 3 errors in the reflect function which are:
helpers.c:83:6: error: conflicting types for 'swap'
void swap(int *a,...
- 79
0
votes
3
answers
1k
views
pset 3 plurality code help
My code prints all names in the case of a two way/threeway tie, but for some reason I still get an error message in check50 that it does not. The only thing I could think of was maybe it had to do ...
- 79
3
votes
2
answers
380
views
Can't compile readability in cs50 IDE
I'm trying to do the readability exercise for week 2 in the cs50 IDE and am unable to compile my program.
I followed the steps below exactly, but am getting the error message depicted below the steps
...
0
votes
1
answer
37
views
scores2 keep giving error even after copying the code verbatim from CS50 2018
I am a beginner in CS50 2018. I was following the 2018 YouTube lecture 2 - Arrays and wrote the codes in CS50 sandbox as the lecture was proceeding. However, I am getting errors even after writing the ...
- 101
0
votes
1
answer
339
views
Cannot Compile Due to Error in cs50.h
I recently migrated my old Cloud9 IDE over to the new AWS format per instructions and all of my files appeared in the new environment. I had only just completed lecture 1 and was starting to make the ...
- 3
0
votes
1
answer
176
views
PSET2 Vigenere: Control may reach end of non-void function error
I wrote a function to return the shift value for a certain character inputted. Where A, a = 0, B,b =1, etc.
int shift(char c)
{
int asc;
if (isupper(c))
{
asc = atoi(&c) - 65;...
0
votes
1
answer
5k
views
When compiling I get an error: note: expanded from macro 'get_float'
When I try to compile with make file, I get the following error
/usr/local/include/cs50.h:177:91: note: expanded from macro 'get_float'
#define get_float(...) __extension__ IF_ELSE(ISEMPTY(...
- 171
0
votes
1
answer
1k
views
Compilation error in hello.c: undefined reference to `get_string'
I'm getting the following error after running make hello. I downloaded the latest version of libcs50from the GitHub releases page and installed using sudo make install.
I'm running the program on ...
0
votes
2
answers
164
views
Keep getting this compile-time message: error: unused parameter 'argv' [-Werror,-Wunused-parameter]
I'm working on pset2 from cs50 and am down to the last bug which I can't seem to wrap my head around. When I read my code, I AM using the parameter argv in line 3. Why the error message?
int main(int ...
- 115
0
votes
1
answer
112
views
pset5 speller dictionary errors
Can someone give me feedback on my code please? I can't compile this, and it says too many errors. A lot of the errors don't seem to make sense. For example, it says "error: use of undeclared ...
- 17
0
votes
1
answer
71
views
speller make error #endif without #if
When I try to 'make' speller, I get this error message:
./dictionary.h:17:2: error: #endif without #if
How can this be, when we were given the dictionary.h file?
I haven't changed anything there.
The ...
- 17
0
votes
1
answer
435
views
error: linker command failed with exit code 1
While compiling speller using make command the following shows up:
/usr/bin/ld: cannot find -lstdbool
/usr/bin/ld: cannot find -ldictionary
/usr/bin/ld: cannot find -lctype
/usr/bin/ld: cannot find -...
- 11
0
votes
1
answer
126
views
Pset3 - Music: Unused parameters and control reaches end of non-void function errors
I have tried and googled everything, but I cannot seem to fix these mysterious errors. Within my helpers.c file, it is saying that I haven't used any of the parameters although I've used all of them.
...
- 15
0
votes
1
answer
121
views
PS3's Fifteen won't compile only during check50?
I have created my solution for pset3's problem "Fifteen". It compiles fine with the standard makefile in cs50's on-line terminal window, and runs correctly as well (also tested with the given 3x3 and ...
- 107
0
votes
1
answer
434
views
CS50 pset 4 recover.c timed out while waiting for program to exit
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
typedef uint8_t BYTE;
int main(int argc , char* argv[]){
//checking number of arguments
...
- 1
0
votes
1
answer
812
views
Problem with "expression result unused error" in for-loop?
I am getting an error message of "expression result unused" for the bottom two for loops (specifically h + 1 and s - 1). I've tried looking for through the other questions for an answer but nothing ...
- 1
0
votes
1
answer
163
views
pset5 load function has "expression result unused" errors
I think this relates to my understanding (or lack of) of pointers. I have 3 errors for the following code -- this is just inside my while statement. Both root and current are defined as nodes and ...
0
votes
1
answer
19
views
Pset2: Code not compiling for Initials
I wrote code for Initials, but when I put the command to make initials.c in the window, it gives me the message :
make: *** No rule to make target `initials.c'. Stop.
I tried compiling the programs ...
0
votes
1
answer
86
views
strange error message when compiling helpers.c
I am very new to programming. When I try and compile helpers.c using the command "make helpers" I get the following error messages:
/usr/bin/ld: /usr/lib/debug/usr/lib/x86_64-linux-gnu/crt1.o(....
- 11
0
votes
1
answer
1k
views
compiling clang string.c says relocation 0 has invalid symbol index 11
When i try to compile string.c file whose code is given below it say relocation 0 has invalid symbol index 11 ... and this happens on and on..
my code is : -
#include <cs50.h>
#include <...
- 1
1
vote
1
answer
71
views
Error in Caesar , can't fix . Need help
#include <stdio.h>
#include <cs50.h>
#include <string.h>
#include <ctype.h>
#include <stdlib.h>
int main(int argc, string argv[])
{
if (argc == 2)
...
- 11
0
votes
1
answer
72
views
What does "using" a variable entail and why does this inconsistency come up? (pset1, greedy, general question)
During the greedy problem in pset1 I wrote this function:
void greedy(int coin_type, int *change, int *coins) {
while (*change / coin_type > 0) {
*coins++;
*change -= coin_type;...
0
votes
1
answer
511
views
pset1 - Greedy Errors "error: expected expression"
Please help! I cant solve some errors (from: [http://docs.cs50.net/problems/greedy/greedy.html][1]) running this code:
int main(void)
{
float change = 0;
int coin_used = 0;
int change2 = ...
0
votes
1
answer
48
views
CODE ON http://cdn.cs50.net/2015/fall/lectures/1/w/src1w/thadgavin.c NOT WORKING [duplicate]
ERROR MESSAGE FOR CODE//
URL/// http://cdn.cs50.net/2015/fall/lectures/1/w/src1w/thadgavin.c
clang -ggdb3 -O0 -std=c11 -Wall -Werror -Wshadow coolcode.c -lcs50 -lm -o coolcode
/usr/bin/ld: /...
- 1
0
votes
2
answers
7k
views
Subscripted value is not an array
I am using exactly the same code as at HowStuffWorks to create a bubbling sorting. But I cannot compile code as I get the following error message:
sorting.c:29:22: error: subscripted value is not an ...
- 109
0
votes
1
answer
740
views
Pset3- Find: "control may reach end of non-void function" (error)
I know that this question has been asked before, but none of the answers have helped me. I keep getting the "control may reach end of non-void function" error when I try to make find after editing ...
- 105
1
vote
2
answers
133
views
PSET6 server: Make server error - Please please help =(
I was almost finished debugging server.c (the only thing that didn't work was that I was getting a 404 error when submitting my query on hello.html) by using gdb. When I thought I'd noticed what the ...
- 45
0
votes
1
answer
13k
views
How to fix the `unused variable` error?
I understand how to extract the query from request line, but when I make the program, it gives me the error unused variable query although it's used later in the code. I don't know what's wrong. here ...
- 76
1
vote
1
answer
172
views
pset3 - recursive binary search not compiling
I wrote a recursive function for binary search in pset" and I keep getting the same error from clang: "control may reach end on non-void function" it is driving me crazy... some help would be very ...
- 13
1
vote
1
answer
791
views
How to fix the "undefined references to GetString" error?
I can't get the GetString() function from the cs50 library to work. I have tried update50 and have rebooted several times and it is still throwing out this error:
jharvard@appliance (~/Dropbox): ...
- 25
0
votes
1
answer
200
views
"Control may reach end of non-void function" but I'm sure my else statements take care of it? [duplicate]
I know this has been asked many times before, but I looked through all the questions and still don't get it.
I know what the error means, I'm just convinced that my code ensures that whatever happens,...
- 31
0
votes
0
answers
1k
views
how to fix the "expected identifier of '('" error?
what does this error mean?
expected identifier or '('
{
^
- 61
0
votes
1
answer
376
views
compilation error multi-character character constant in caesar
The code is:
string plaintext = GetString();
for (int i = 0, n = strlen(plaintext); i < n; i++)
{
printf("%c", plaintext[i]);
if ((isalpha(plaintext[i])) && (isupper(...
- 5
0
votes
2
answers
3k
views
why do I get "error: expected expression" when I try to compile my binary search implementation?
Having some trouble figuring out this error message as I write the Binary Search function. Any advice greatly appreciated!
bool binarySearch(int key, int array[], int min, int max);
bool search(int ...
- 11
0
votes
0
answers
28
views
Am I using the "return" statement incorrectly?
I am getting this error message while trying to compile:
"error: expected identifier or '('"
"return (int)"
^
My code preceding the "return (int)" is a do ...while loop that sets int as n and uses "n ...
0
votes
1
answer
3k
views
How to fix the "expression result unused" compilation error?
When I try to run this code through the compiler, I get the error:
expression result unused
referring to the line
cents - 25;
How do I fix this error? How exactly do I "use" the expression ...
- 5
0
votes
1
answer
1k
views
Error: control may reach end of non-void function [duplicate]
I am currently working on pset3/search and when I try to compile the codes it keeps telling me that ^ error. I know that it is because I must not be returning a boolean value as needed, but I do not ...
2
votes
2
answers
401
views
why can't I compile the program that I wrote to test helpers.c?
I've made a program to test my sort function. The only problem is that when I try to compile it gives me the "undefined reference to 'sort'" error as seen in the below:
For context, I have taken the ...
