Linux equivalent of I_PUSH
TIOCPKT is exactly what you want, according to the tty_ioctl(4) man page: the argument is a pointer to an integer which is non-zero to enable packet mode, or zero to disable it.
TIOCPKT is exactly what you want, according to the tty_ioctl(4) man page: the argument is a pointer to an integer which is non-zero to enable packet mode, or zero to disable it.
The error is referring to this line: Here you’re (apparently) trying to call delay as a function. However, delay is declared as: It’s just a number, not a function, hence you can’t call it.
In (ANSI) C99, you can use a designated initializer to initialize a structure: Other members are initialized as zero: “Omitted field members are implicitly initialized the same as objects that have static storage duration.” (https://gcc.gnu.org/onlinedocs/gcc/Designated-Inits.html)
An array “decays” into a pointer to its first element, so scanf(“%s”, string) is equivalent to scanf(“%s”, &string[0]). On the other hand, scanf(“%s”, &string) passes a pointer-to-char[256], but it points to the same place. Then scanf, when processing the tail of its argument list, will try to pull out a char *. That’s the Right Thing when you’ve passed in string or &string[0], but when … Read more
There’s no new/delete expression in C. The closest equivalent are the malloc and free functions, if you ignore the constructors/destructors and type safety.
I’d suggest that you run gcc -v your_file.c. That will let you see exactly what commands your linker is using. You probably don’t have an stdio.o file to link against. Instead this is included in the C runtime library and the exact file will depend on your system configuration.
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
I am doing very basic dynamic allocation practice in C and I came across this issue: when I am trying to call free() with the pointer returned by malloc(), I am getting Invalid pointer error during run time. When I remove free() from code, it works fine. The pointer that I am using is not modified anyhow after returned by malloc (except … Read more
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
without using a computer you can calculate it like this: 0xFFFF FE58 is a negative number in 2’s complement. To get the absolute value you have to invert all bits and add 1 in binary. You also can subtract this number from the first number out of range (0x1 0000 0000) now we know that your … Read more