?? dpythag.c
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#include <math.h>#define NRANSI#include "nrutil.h"double dpythag(double a, double b){ double absa,absb; absa=fabs(a); absb=fabs(b); if (absa > absb) return absa*sqrt(1.0+DSQR(absb/absa)); else return (absb == 0.0 ? 0.0 : absb*sqrt(1.0+DSQR(absa/absb)));}#undef NRANSI?? 快捷鍵說(shuō)明
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