The math library must be linked in when building the executable. How to do this varies by environment, but in Linux/Unix, just add -lm to the command: The math library is named libm.so, and the -l command option assumes a lib prefix and .a or .so suffix.
stdafx.h is the precompiled header used by Visual Studio, you do not need this. You seem to have missed out the int main() function It is std::endl not std::end1 So something like this:
Section 6.6 of The C Programming Language presents a simple dictionary (hashtable) data structure. I don’t think a useful dictionary implementation could get any simpler than this. For your convenience, I reproduce the code here. Note that if the hashes of two strings collide, it may lead to an O(n) lookup time. You can reduce the likelihood of collisions … Read more
The math library must be linked in when building the executable. How to do this varies by environment, but in Linux/Unix, just add -lm to the command: The math library is named libm.so, and the -l command option assumes a lib prefix and .a or .so suffix.
You’re attempting to free something that isn’t a pointer to a “freeable” memory address. Just because something is an address doesn’t mean that you need to or should free it. There are two main types of memory you seem to be confusing – stack memory and heap memory. Stack memory lives in the live span of the function. … Read more
The purpose of this code is to pass a virtual address in decimal and output the page number and offset. After I compile my code using the gcc compiler on Linux I get this error: indirection requires pointer operand (‘int’ invalid) virtualAddress = *atoi(argv[1]);
Declaration A prototype for a function which takes a function parameter looks like the following: This states that the parameter f will be a pointer to a function which has a void return type and which takes a single int parameter. The following function (print) is an example of a function which could be passed to func as a parameter because it is … Read more
I get that compilation error because of this line which intended to increase the pointer by 0x200 (to point to the next segment) I’v seen this but I didn’t use any illegal symbol! P.S. The initialization of the pointer:
No, you’re not allocating memory for y->x twice. Instead, you’re allocating memory for the structure (which includes a pointer) plus something for that pointer to point to. Think of it this way: So you actually need the two allocations (1 and 2) to store everything. Additionally, your type should be struct Vector *y since it’s a pointer, and you should never cast the return value … Read more
Check the return value of strtok. In your code here strtok is returning a NULL pointer and according to documentation, A null pointer is returned if there are no tokens left to retrieve. which matches my original guess that because the address code is 0x0 there’s a NULL pointer deference somewhere. Obviously, the following call to atoi is expecting a non-NULL pointer … Read more