7u83/stc_rpncalc
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log10() fixes to prevent calculator from crashing

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This commit is contained in:
Jeff Wang
2019-10-04 23:49:42 -04:00
parent c2edc7871d
commit ce42e30513
4 changed files with 37 additions and 13 deletions
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11
src/decn/proto/ln_mfp.cpp
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@ -10,10 +10,6 @@ using namespace boost::multiprecision;
using std::cout;
using std::endl;
static const int BSIZE = 200;
char buf[BSIZE];
char pbuf[BSIZE];
static const int NUM_A_ARR = 9;
mpfr_float a_arr[NUM_A_ARR];
mpfr_float ln_a_arr[NUM_A_ARR];
@ -48,7 +44,7 @@ int main(void){
mpfr_float accum(b_j, CALC_PRECISION);
mpfr_float_1000 actual;
actual = log(A);
int num_times[NUM_A_ARR];
//track number of times multiplied by a_arr[j]
for (int j = 0; j < NUM_A_ARR; j++){
@ -69,7 +65,7 @@ int main(void){
// printf(" %d: num_times: %d, ", j, num_times[j]);
// cout << b_j << endl;
}
//build final value
accum = b_j; //remainder
accum *= pow(10.0, -(NUM_A_ARR - 1)); //scale remainder
@ -81,10 +77,11 @@ int main(void){
}
accum = -accum;
//calculate relative error
mpfr_float_1000 calc, diff;
calc = accum;
diff = (actual - calc)/actual;
if (diff > 5e-17){
cout << x << ": ";
cout << std::setprecision(18) << accum << ", ";