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.
You are getting Floating point exception because Number % i, when i is 0: Just start the loop at i = 2. Since i = 1 in Number % i it always be equal to zero, since Number is a int.
You need to use extern “C” in C++ when declaring a function that was implemented/compiled in C. The use of extern “C” tells the compiler/linker to use the C naming and calling conventions, instead of the C++ name mangling and C++ calling conventions that would be used otherwise. For functions provided by other libraries, you will almost never need … Read more
From the sed man page: Normally, sed cyclically copies a line of input, not including its terminating newline character, into a pattern space, (unless there is something left after a “D” function), applies all of the commands with addresses that select that pattern space, copies the pattern space to the standard output, appending a newline, and deletes … Read more