ifcqexp.c

来自「开放源码的编译器open watcom 1.6.0版的源代码」· C语言 代码 · 共 62 行

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//
// IFCQEXP      : exponential function for COMPLEX*20 argument
//

#include "fmath.h"

#include "ftnstd.h"
#include "ifenv.h"


xcomplex        CQEXP( extended rp, extended ip ) {
//=============================================

// Return the exponential of arg.
// exp( x + iy ) = exp( x ) * cis( y )

    xcomplex    result;

    result.realpart = exp( rp );
    result.imagpart = result.realpart * sin( ip );
    result.realpart *= cos( ip );
    return( result );
}

xcomplex        XCQEXP( xcomplex *arg ) {
//=======================================

    return( CQEXP( arg->realpart, arg->imagpart ) );
}