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#ifdef KR_headers
extern double sqrt();
double f__cabs(real, imag) double real, imag;
#else
#undef abs
#include <math.h>
double f__cabs(double real, double imag)
#endif
{
double temp;
if(real < 0)
real = -real;
if(imag < 0)
imag = -imag;
if(imag > real){
temp = real;
real = imag;
imag = temp;
}
if((real+imag) == real)
return(real);
temp = imag/real;
temp = real*sqrt(1.0 + temp*temp); /*overflow!!*/
return(temp);
}
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