freebsd-dev/contrib/libf2c/libF77/c_exp.c

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#include "f2c.h"
#ifdef KR_headers
extern double exp(), cos(), sin();
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VOID c_exp(r, z) complex *r, *z;
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#else
#undef abs
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#include "math.h"
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void c_exp(complex *r, complex *z)
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#endif
{
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double expx, zi = z->i;
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expx = exp(z->r);
r->r = expx * cos(zi);
r->i = expx * sin(zi);
}