Questions tagged [complex.h]
8 questions
4
votes
1 answer
Tilde '~' operator on _Complex, what does it do? Is it an extension?
In C99, it looks like the '~' operator on a _Complex performs a complex conjugate. The following code:
#include
#include
int main()
{
double _Complex a = 2 + 3 * I;
printf("%f,%f\n", creal(~a), cimag(~a));
}
Gives the…
Derek Ross
- 75
- 5
0
votes
2 answers
How to read imaginary data from text file, with C
I am unable to read imaginary data from text file.
Here is my .txt file
abc.txt
0.2e-3+0.3*I 0.1+0.1*I
0.3+0.1*I 0.1+0.4*I
I want to read this data into a matrix and print it.
I found the solutions using C++ here and here. I don't know how…
user19013072
0
votes
1 answer
Passing pointer to complex double in C (using complex.h)
I am trying to run a function, int testfn below, which should assign a complex number to the pointer (to a complex number), double _Complex *foo below, that it is fed. The minimal (non-working) example .c file is test.c below.
When I call testfn…
calgopher
- 23
- 5
0
votes
0 answers
typedef for C complex type results in compilation error on IAR compiler, but works on GCC and ARMCC
I have some C code for an ARM-based microcontroller that already compiles with GCC and the ARM compiler. However, when compiling with IAR V8.42.1, there is a problem with the following
typedef float _Complex f_complex;
The error message is
expected…
dandan78
- 13,328
- 13
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- 78
0
votes
2 answers
How GCC understand complex arithmetics?
I am bit new to C language and I have a question in some basic principles about C. I'm on the way of implementing a custom complex library that deals with fixed point arithmetic.
We can use a library called complex.h in C. using that library we can…
BMTC
- 3
- 2
0
votes
2 answers
In C, How can I compare Complex Numbers as with <, >, et cetera
I keep receiving this error message when compiling a simplified mandelbrot function.
main.c:86:43: error: invalid operands to binary > (have ‘complex double’ and ‘complex float’)
else if(f2r > 1000 || f2i > 1000 * I) {
........^
There are other…
0
votes
2 answers
How to read complex number using complex.h in C?
I want to read from a file two complex numbers
(1.1,2) (1.7,3.14)
In the beginning I do this
struct Num { double Re;
double Im;
};
typedef struct Num zesp;
zesp readZ(FILE *wp)
{
char c;
zesp z;
…
Jakub
- 679
- 5
- 16
0
votes
0 answers
Why is this complex.h typedef not working?
I've been referencing published C++ code from MIT here. I'm trying to compile the code using the provided Makefile. Note I'm using Ubuntu version 20.04 and installed g++.
From a previous question I posted here, the code seems to be tripping up over…
Izzo
- 4,461
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