“%f” is the (or at least one) correct format for a double. There is no format for a float, because if you attempt to pass a float to printf, it’ll be promoted to double before printf receives it1. “%lf” is also acceptable under the current standard — the l is specified as having no effect … Read more
I have the following function : And I call it in main: I get “void value not ignored as it ought to be” but I don’t understand what is wrong.Why do I get this error?
Stack Smashing here is actually caused due to a protection mechanism used by gcc to detect buffer overflow errors. For example in the following snippet: The compiler, (in this case gcc) adds protection variables (called canaries) which have known values. An input string of size greater than 10 causes corruption of this variable resulting in … Read more
make has a very stupid relationship with tabs. All actions of every rule are identified by tabs. And, no, four spaces don’t make a tab. Only a tab makes a tab. To check, I use the command cat -e -t -v makefile_name. It shows the presence of tabs with ^I and line endings with $. … Read more
uint16_t is unsigned 16-bit integer. unsigned short int is unsigned short integer, but the size is implementation dependent. The standard only says it’s at least 16-bit (i.e, minimum value of UINT_MAX is 65535). In practice, it usually is 16-bit, but you can’t take that as guaranteed. Note: If you want a portable unsigned 16-bit integer, … Read more
I picked up the following demo off the web from https://computing.llnl.gov/tutorials/pthreads/ But when I compile it on my machine (running Ubuntu Linux 9.04) I get the following error: This doesn’t make any sense to me, because the header includes pthread.h, which should have the pthread_create function. Any ideas what’s going wrong?
You’re probably dividing by zero or some other nonsensical number. Are you sure real and imag for IFFTOutput[i] isn’t zero? Print it out just before perhaps?
Use a while loop after each getchar() if you want to process only one character
? is the first symbol of the ?: ternary operator. a will have the value 1 if b is equal to 0, and 0 otherwise.
It’s an abbreviation of Error NO ENTry (or Error NO ENTity), and can actually be used for more than files/directories. It’s abbreviated because C compilers at the dawn of time didn’t support more than 8 characters in symbols.