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GMP

GNU Multiple Precision Arithmetic Library

Numerical instability로 고민하고 계시다면 GMP를 써보세요.

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설명서

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예제


#include <gmp.h>
int main()
 {
    mpf_t fac;
    int i;
   mpf_init(fac);
    mpf_set_d(fac,(double) 1);
   for (i=1;i<40;i++) {
      mpf_mul_ui(fac, fac, (unsigned long) i);
    }
   gmp_printf("%.*Ff\n",40,fac);
 }
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