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#redirect [[C mathematical functions#complex.h]]
{{dated prod|concern = Wikipedia is [[WP:NOT#GUIDE|not a manual, guidebook, or textbook]], and it is [[WP:NOT#INFO|not an indiscriminate collection of information]]. This is suitable for a C++ reference manual, not for an encyclopedia.|month = February|day = 29|year = 2008|time = 09:44|timestamp = 20080229094447}}
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Note: any examples assume the use of the GNU g++ compiler.
==Overview==
'''complex.h''' - a part of the C++ standard library which provides functionality for complex arithmetic.
==Function Declarations==
The header '''complex.h''' defines the following functions:
{| class="wikitable"
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|<code>double cabs(double complex);</code> ||
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|<code>float cabsf(float complex);</code> ||
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|<code>long double cabsl(long double complex);</code> ||
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|<code>double complex cacos(double complex);</code> ||
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|<code>float complex cacosf(float complex);</code> ||
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|<code>double complex cacosh(double complex);</code> ||
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|<code>float complex cacoshf(float complex);</code> ||
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|<code>long double complex cacoshl(long double complex);</code> ||
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|<code>long double complex cacosl(long double complex);</code> ||
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|<code>double carg(double complex);</code> ||
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|<code>float cargf(float complex);</code> ||
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|<code>long double cargl(long double complex);</code> ||
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|<code>double complex casin(double complex);</code> ||
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|<code>float complex casinf(float complex);</code> ||
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|<code>double complex casinh(double complex);</code> ||
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|<code>float complex casinhf(float complex);</code> ||
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|<code>long double complex casinhl(long double complex);</code> ||
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|<code>long double complex casinl(long double complex);</code> ||
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|<code>double complex catan(double complex);</code> ||
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|<code>float complex catanf(float complex);</code> ||
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|<code>double complex catanh(double complex);</code> ||
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|<code>float complex catanhf(float complex);</code> ||
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|<code>long double complex catanhl(long double complex);</code> ||
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|<code>long double complex catanl(long double complex);</code> ||
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|<code>double complex ccos(double complex);</code> ||
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|<code>float complex ccosf(float complex);</code> ||
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|<code>double complex ccosh(double complex);</code> ||
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|<code>float complex ccoshf(float complex);</code> ||
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|<code>long double complex ccoshl(long double complex);</code> ||
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|<code>long double complex ccosl(long double complex);</code> ||
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|<code>double complex cexp(double complex);</code> ||
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|<code>float complex cexpf(float complex);</code> ||
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|<code>long double complex cexpl(long double complex);</code> ||
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|<code>double cimag(double complex);</code> ||
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|<code>float cimagf(float complex);</code> ||
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|<code>long double cimagl(long double complex);</code> ||
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|<code>double complex clog(double complex);</code> ||
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|<code>float complex clogf(float complex);</code> ||
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|<code>long double complex clogl(long double complex);</code> ||
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|<code>double complex conj(double complex);</code> ||
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|<code>float complex conjf(float complex);</code> ||
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|<code>long double complex conjl(long double complex);</code> ||
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|<code>double complex cpow(double complex, double complex);</code> ||
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|<code>float complex cpowf(float complex, float complex);</code> ||
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|<code>long double complex cpowl(long double complex, long double complex);</code> ||
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|<code>double complex cproj(double complex);</code> ||
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|<code>float complex cprojf(float complex);</code> ||
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|<code>long double complex cprojl(long double complex);</code> ||
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|<code>double creal(double complex);</code> ||
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|<code>float crealf(float complex);</code> ||
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|<code>long double creall(long double complex);</code> ||
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|<code>double complex csin(double complex);</code> ||
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|<code>float complex csinf(float complex);</code> ||
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|<code>double complex csinh(double complex);</code> ||
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|<code>float complex csinhf(float complex);</code> ||
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|<code>long double complex csinhl(long double complex);</code> ||
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|<code>long double complex csinl(long double complex);</code> ||
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|<code>double complex csqrt(double complex);</code> ||
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|<code>float complex csqrtf(float complex);</code> ||
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|<code>long double complex csqrtl(long double complex);</code> ||
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|<code>double complex ctan(double complex);</code> ||
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|<code>float complex ctanf(float complex);</code> ||
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|<code>double complex ctanh(double complex);</code> ||
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|<code>float complex ctanhf(float complex);</code> ||
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|<code>long double complex ctanhl(long double complex);</code> ||
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|<code>long double complex ctanl(long double complex);</code> ||
|-
|}
==Notes==
<big>'''Values are represented in radians.'''</big>
==Example Code==
===Initializing Complex Number objects===
#include <complex>
#include <iostream>
using namespace std;
int main(void)
{
complex<float> a(1,0);
complex<float> b(0,1);
cout <<"a="<< a<<endl;
cout <<"b="<< b<<endl;
return 0;
}
===Prompting the user for a complex number===
#include <complex>
#include <iostream>
using namespace std;
int main(void)
{
complex<float> a(0,0);
cout << "Enter a complex value\n";
cin >> a;
cout <<"a="<< a<<endl;
return 0;
}
==REFERENCE==
*The Original Open Group standards from which this table is derived can be found at [http://www.open-group.org/unix/online.html http://www.open-group.org/unix/online.html]
*See also [http://www.opengroup.org/onlinepubs/009695399/basedefs/complex.h.html http://www.opengroup.org/onlinepubs/009695399/basedefs/complex.h.html]
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