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