From 82ba818ff456bcd6d56a06226e3f27e98fbb55c3 Mon Sep 17 00:00:00 2001 From: Craig Jennings Date: Thu, 14 Aug 2025 22:58:58 -0500 Subject: removing all downloaded devdocs files --- devdocs/c/numeric%2Fcomplex%2Fcarg.html | 55 --------------------------------- 1 file changed, 55 deletions(-) delete mode 100644 devdocs/c/numeric%2Fcomplex%2Fcarg.html (limited to 'devdocs/c/numeric%2Fcomplex%2Fcarg.html') diff --git a/devdocs/c/numeric%2Fcomplex%2Fcarg.html b/devdocs/c/numeric%2Fcomplex%2Fcarg.html deleted file mode 100644 index 608d566f..00000000 --- a/devdocs/c/numeric%2Fcomplex%2Fcarg.html +++ /dev/null @@ -1,55 +0,0 @@ -

cargf, carg, cargl

Defined in header <complex.h> 
float       cargf( float complex z );
-		 (1) (since C99) 
double      carg( double complex z );
-		 (2) (since C99) 
long double cargl( long double complex z );
-		 (3) (since C99)
Defined in header <tgmath.h> 
#define carg( z )
-		 (4) (since C99)
-1-3) Computes the argument (also called phase angle) of z, with a branch cut along the negative real axis.
-4) Type-generic macro: if z has type long double complex, long double imaginary, or long double, cargl is called. If z has type float complex, float imaginary, or float, cargf is called. If z has type double complex, double imaginary, double, or any integer type, carg is called.

Parameters

- -
z - complex argument

Return value

If no errors occur, returns the phase angle of z in the interval [−π; π].

-

Errors and special cases are handled as if the function is implemented as atan2(cimag(z), creal(z))

-

Example

#include <stdio.h>
-#include <complex.h>
- 
-int main(void) 
-{
-    double complex z1 = 1.0+0.0*I;
-    printf("phase angle of %.1f%+.1fi is %f\n", creal(z1), cimag(z1), carg(z1));
- 
-    double complex z2 = 0.0+1.0*I;
-    printf("phase angle of %.1f%+.1fi is %f\n", creal(z2), cimag(z2), carg(z2));
- 
-    double complex z3 = -1.0+0.0*I;
-    printf("phase angle of %.1f%+.1fi is %f\n", creal(z3), cimag(z3), carg(z3));
- 
-    double complex z4 = conj(z3); // or CMPLX(-1, -0.0)
-    printf("phase angle of %.1f%+.1fi (the other side of the cut) is %f\n",
-             creal(z4), cimag(z4), carg(z4));
-}

Output:

-
phase angle of 1.0+0.0i is 0.000000
-phase angle of 0.0+1.0i is 1.570796
-phase angle of -1.0+0.0i is 3.141593
-phase angle of -1.0-0.0i (the other side of the cut) is -3.141593

References

See also

- - -
-
(C99)(C99)(C99)
 computes the magnitude of a complex number
(function)
-
(C99)(C99)
 computes arc tangent, using signs to determine quadrants
(function)
C++ documentation for arg
-

- © cppreference.com
Licensed under the Creative Commons Attribution-ShareAlike Unported License v3.0.
- https://en.cppreference.com/w/c/numeric/complex/carg -

-
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