You are wrongly using an hack to pass an integer to a thread. The idea behind what you are doing is an integer is 4 bytes and a pointer is 4 bytes in x86_32 (8 bytes in x86_64) so I can convert an integer type to a pointer type and then convert it back to … Read more
Assuming that earlier code has already split up the line into individual numbers, then the check you want is strtol will never set endtoken to a null pointer; it will set it to point to the first character that is not a digit. If that character is the NUL string terminator (note the slightly different … Read more
I’ve had nice results with djb2 by Dan Bernstein.
1) Make a vector from your orig point to the point of interest: v = point-orig (in each dimension); 2) Take the dot product of that vector with the unit normal vector n: dist = vx*nx + vy*ny + vz*nz; dist = scalar distance from point to plane along the normal 3) Multiply the unit … Read more
It also happens if you’re trying to access an instance when you have a pointer, and vice versa: As pointed out in a comment, this can be made excruciating if someone goes and typedefs a pointer, i.e. includes the * in a typedef, like so: Because then you get code that looks like it’s dealing with instances, when in fact … Read more
I think you should move the variable declaration to top of block. I.e. to
You can’t directly do array2 = array1, because in this case you manipulate the addresses of the arrays (char *) and not of their inner values (char). What you, conceptually, want is to do is iterate through all the chars of your source (array1) and copy them to the destination (array2). There are several ways to … Read more
Pointer arithmetic is always in terms of the size of the pointed-to object(s). Incrementing a char* will advance the address by one, whereas for int* it would usually be four (bytes). But void has unknown size, so pointer arithmetic on void* is not allowed by the standard. Cast to the appropriate type first; if you just want to manipulate the address as if … Read more
The elegant way: The slightly ugly way: The slightly strange way: Note that the strtok function doesn’t work as expected if the user enters an empty string (i.e. presses only Enter). It leaves the \n character intact. There are others as well, of course.