How to convert a vector <char> to a const char?
Author
[color=#000000][font=verdana, arial, helvetica, sans-serif]
Hello I'm having troubles doing conversions of vectors and chars
.[/font]Heres my vector:[/font]
Heres my const char array :[/font]
That doesn't make a lot of sense. A vector<char> contains potentially multiple characters. Why would you want to convert it to a single character?
so I can access it using operator [ ]
Author
My wavefront .obj parser needs a const char *filename before it will parse the data as triangles on the screen. so conversion of the vector <char> to const char array is important in this case:
dir=opendir("Box Storage");
if(dir)
{
while(drnt = readdir(dir))
{
// printf("%-20s ", drnt->d_name);
file_list.push_back(drnt->d_name);
}
cout << "found the following files:\n";
for(int i = 0; i < file_list.size(); i++)
{
// cout << file_list << "\n";
}
map<string, vector<char> > files;
for(int i = 0; i < file_list.size(); i++)
{
//load file_list into file_data with fread etc...
files[file_list] = file_data;
}
//cout << "file data "<< &file_data[0] << endl;
//const char* file_char = &file_data[0];
//THIS WON'T WORK 
loadObject(file_data[0]);
// loadObject(file_data);
}
&file_data[0] will give you a pointer to the first element of the vector, which you should already know since it shows up in your commented out code.
Author
exactly thats why it won't work because its an element of the vector .
What I need is a filename from the const char array .
To do that I need to convert the vector with index 0 to a const char array so the filename which is contained within the const char array is the first file in the directory box storage.
My problem is how to do the above ^^.
Sorry if my responses are vague or weirdly constructured.
What I need is a filename from the const char array .
To do that I need to convert the vector with index 0 to a const char array so the filename which is contained within the const char array is the first file in the directory box storage.
My problem is how to do the above ^^.
Sorry if my responses are vague or weirdly constructured.
A vector is a dynamic array. A pointer to the first element of a vector is a pointer to an array of the type the vector stores. Pointers to a char array can be treated as a pointer to a const char array.
Author
then if thats the case why is my parser returning that it can't open up the filename? most likely because the vector doesn't contain the filename in which case how is that possible.? is it because I maped the data to memory because if so then that makes everything alot worser.
map<string, vector<char> > files;
If you're storing a string, then why are you using std::vector instead of std::string?
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