Questions tagged [const-char]
68 questions
1
vote
1 answer
counting algorithm and pointer types
I wrote the following code as an exercise about function templates and template specializations. It's a function that counts how many objects of a given type are present in a vector:
template
int function(const std::vector &vec, T…
Luca
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1
vote
1 answer
Initialize const char* by concatenating another char*
I want to refactor:
const char* arr =
"The "
"quick "
"brown";
into something like:
const char* quick = "quick ";
const char* arr =
"The "
quick
"brown";
because the string "quick" is used is many other places. Ideally I need to be…
user3757652
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1
vote
1 answer
Why does GCC accept convertion from 'const char *' to 'char *' on std::strrchr() returned value?
While adding a detailed answer, I noticed that GCC does not warn the following code while Visual C++ complains.
#include
int main()
{
const char CONSTSTR[] = "foo/bar/foobar.txt";
char *nonconst = std::strrchr (CONSTSTR, '/');
…
oHo
- 51,447
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1
vote
3 answers
Compare Objective-C const char with NSString
I was wondering if there is a simple way to compare a const char with an NSString, or do I have to convert the const char to an NSString before doing do?
I have been looking through Apple docs but struggling to find an answer to my question.
HurkNburkS
- 5,492
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1
vote
1 answer
const char * changing value during loop
I have a function that iterates through a const char * and uses the character to add objects to an instance of std::map if it is one of series of recognized characters.
#define CHARSEQ const char*
void compile(CHARSEQ s) throw…
ApproachingDarknessFish
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0
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1 answer
const char* convert have problem result in print nothing
I try to convert uint64_t to const char *. But I find If I use
const char *sz2 = std::to_string(channel_id2).c_str();, it print nothing.
when I use string to take std::to_string(channel_id2)'s result and convert the string to const char *, it can…
cat
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- 1
0
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0 answers
Error invalid conversion from 'const char*' to 'char*'
I Expect to get the name which I sent to the "class stud" which has a class variable CHAR name
The issue appears specifically at this line this->name->set_name_send(OBJ.name->get_name());
and I get this error " -- invalid conversion from 'const…
Ghips
- 1
- 1
0
votes
2 answers
custom exception class, using a base class, with multiple arguments
So I'm setting up custom exception classes for a program I am writing. I'm creating a catch-all base class, that I will use primarily as a generic exception. This base class will be inherited by several other custom exceptions. Here is the base…
Michael
- 174
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- 13
0
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2 answers
Can not covert from 'const char*' to 'char*' in VS19, although earlier could
I bought a Surface Go 2 today, and installed Visual Studio 2019. I loaded my project, that successfully compiled on my previous PC, also in VS19.
The first problem that I noticed is that the VS editor displays Unicode characters (Cyrillic) in my…
Thawbkisavv
- 17
- 5
0
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0 answers
argument of type "WCHAR *" is incompatible with parameter of type "const char *"
I get this message and i dont know what to do.
argument of type "WCHAR *" is incompatible with parameter of type "const char *"
this is the code(it has a problem with the modEntry)
uintptr_t GetModule(const char* modName, DWORD procId) {
HANDLE…
0
votes
1 answer
Returning and Printing Strings in C++
I am trying to get a file path from the user in the getPath() function and return the path as a string. I am having trouble because the compiler says i need to use const char's and i dont know how to do that. How would I use const chars and what…
Harrison Brammell
- 23
- 7
0
votes
2 answers
Is const char* automatically deleted when it is passed as an argument?
When I pass a const char* as a function argument (like this):
void print(const char* text)
{
std::cout << text << std::endl;
}
Is it automatically deleted? If not, what happens to it, and how should I delete it?
SuperSim135
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0
votes
2 answers
Lambda: Is capture of const char * from function scope in lambda undefined behaviour
I have a lambda which uses a const char * defined in function scope. The lambda is executed after the function returns.
void function() {
const char * UNLOCK_RESULT = "unlockResult";
..
..
TestStep::verifyDictionary(test,…
Andrew Goedhart
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0
votes
6 answers
Program hanging while running, compiles well
EDITED :
#include
using namespace std;
#include
#include
void dfsvisit(int a[][30], int i, const char *color[])
{
int v;
int p[30];
int f[30]={};
static int j=1;
…
Ava
- 5,783
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0
votes
2 answers
C++ Get length of const char* [ ] in vector
How do I get the length of const char* arrays indexes?
The vector:
std::vector _infoBarText;
The const char* []:
const char* text[4] = {"Current T:", "Target T:", "Time elapsed:", "Time remaining:"};
Assigning the char array to the…
Daan van Driel
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