Перевести из Perl в C++
07.04.2014, 22:28. Показов 971. Ответов 1
Всем добра! 
Переводил как-то прогу одну из Perl в C++ и возникло несколько моментов
в Perl функция sqrt умеет вычислять значения корня из комплексного числа, а как научить C++ sqrt работать с комплексными числами?
ещё как перевести на C++ эти конструкции
| Perl | 1
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| @freqs=(@freqs,$rf);
@RExp=(@RExp,$rr); |
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частично переведённый на C++
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| #include <iostream>
#include <complex>
#include <fstream>
#include <vector>
#define PI 3.1415
#define ERROR_LOG "error_log.txt"
int main(int argc, char **argv)
{
double numpoints = 15,
freq1 = 7.8e9,
freq2 = 10.2e9,
epsilon10 = 0,
epsilon11 = 81,
epsilon20 = 0,
epsilon21 = 30,
len = 0.4e-02,
a = 2.85e-02,
mu = 1;
int iterations = 5,
NumExPoints = 0;
std::cout << "len -> "; std::cin >> len;
std::cout << "a -> "; std::cin >> a;
std::cout << "epsilon10 -> "; std::cin >> epsilon10;
std::cout << "epsilon11 -> "; std::cin >> epsilon11;
std::cout << "epsilon20 -> "; std::cin >> epsilon20;
std::cout << "epsilon21 -> "; std::cin >> epsilon21;
len++; len--;
a++; a--;
epsilon10++; epsilon10--;
epsilon11++; epsilon11--;
epsilon20++; epsilon20--;
epsilon21++; epsilon21--;
double rf, rr, rt;
std::vector<double> freqs, RExp, TExp;
while (std::cin >> rf >> rr)
{
rf--; rf++;
rf *= 1.0E9;
rr--; rr++;
rr--; rr++;
rr = (rr - 1)/(rr + 1);
freqs.push_back(rf);
RExp.push_back(rr);
// TExp.push_back(rt);
NumExPoints++;
}
double epsilon1m = epsilon10;
double epsilon2m = epsilon20;
double deltaRm = 0;
double omega, gamma, gamma0, epsilon0, mu0;
std::complex<double> epsilon = (epsilon1m, -epsilon2m);
for(int m = 0; m < NumExPoints; m++)
{
omega = 2 * PI * freqs.at(m);
gamma0 = sqrt((pow(omega, 2.0) * epsilon0 * mu0) - (pow(PI, 2.0))/(pow(a, 2.0)));
gamma = sqrt((pow(omega, 2.0) * epsilon0 * epsilon * mu0 * mu) - (pow(PI, 2.0))/(pow(a, 2.0)));
khvost = 2 * gamma0 * gamma * cos(gamma * len) + (gamma0 * gamma0 + pow(gamma, 2.0)) * i * sin(gamma * len);
R = (gamma0 * gamma0 - pow(gamma, 2.0)) * i * sin(gamma * len)/khvost;
deltaRm += ((R * ~$R)-$RExp[$m])*(($R * ~$R)-$RExp[$m]);
}
std::cerr << "Start error: " << deltaRm << std::endl;
for (int iter = 0; iter < iterations; iter++)
{
epsilon1s = (epsilon11 - epsilon10)/numpoints;
epsilon2s = (epsilon21 - epsilon20)/numpoints;
std::cerr << "Pass " << iter << "\t" << nepsilon1 << "\t" << epsilon10 << "\t:\t" << epsilon11 << "\t± " << $epsilon1s << "\nepsilon2:\t" << epsilon20 << "\t:\t" << epsilon21 << "\t± " << epsilon2s << "\n";
for(int k = 0; k < numpoints; k++)
{
std::cerr << "Row " << k << ":\t";
epsilon1 = epsilon10 + k * epsilon1s;
for(int l = 0; l< numpoints; l++)
{
epsilon2 = epsilon20 + l * epsilon2s;
epsilon = epsilon1 - epsilon2 * i;
/** Зафиксировали epsilon, теперь варьируем частоту и проверяем # R&T. */
deltaR = 0;
for(int m = 0; m < NumExPoints; m++)
{
omega = 2 * PI * freqs.at(m);
gamma0 = sqrt((pow(omega, 2.0) * epsilon0 * mu0) - (pow(PI, 2.0))/(pow(a, 2.0)));
gamma = sqrt((pow(omega, 2.0) * epsilon0 * epsilon * mu0 * mu) - (pow(PI, 2.0))/(pow(a, 2.0)));
khvost = 2 * gamma0 * gamma * cos(gamma * len) + (pow(gamma0, 2.0) + pow(gamma, 2.0)) * i * sin(gamma * len);
R = (pow(gamma0, 2.0) + pow(gamma, 2.0)) * i * sin(gamma * len)/khvost;
RR = ($R * ~$R);
deltaR += (RR - RExp.at(m)) * (RR - RExp.at(m));
}
/** Отлично. Теперь у нас есть дельта новая. Осталось сверить ее с рекордным значением. */
if(deltaR < deltaRm)
{
epsilon1m = epsilon1;
epsilon2m = epsilon2;
deltaRm = deltaR;
std::cerr << "!";
}
else
{
std::cerr << "*";
}
}
std::cerr << "\n"
}
/** Теперь сделаем финт ушами: выберем новые границы диапазона epsilon и посчитаем в них. */
newepsilon10 = epsilon1m - (epsilon11 - epsilon10)/4.0;
if (newepsilon10 < 0)
newepsilon10 = 0;
newepsilon11 = epsilon1m + (epsilon11 - epsilon10)/4.0;
if(newepsilon11 < 0)
newepsilon11 = 0;
newepsilon20 = epsilon2m - (epsilon21 - epsilon20)/4.0;
if( newepsilon20 < 0)
newepsilon20 = 0;
newepsilon21 = epsilon2m + (epsilon21 - epsilon20)/4.0;
if(newepsilon21 < 0)
newepsilon21 = 0;
epsilon10 = newepsilon10;
epsilon20 = newepsilon20;
epsilon11 = newepsilon11;
epsilon21 = newepsilon21;
std::cerr << "Epsilon value:" << epsilon1m << " : " << epsilon2m << "\nError: " << deltaRm << "\n\n";
}
std::cout << epsilon1m << "\t" << epsilon2m << "\t" << deltaRm << "\n";
epsilon = epsilon1m - epsilon2m * i;
for(int k = 0; k < NumExPoints; k++)
{
f = freqs.at(k);
omega = 2 * PI * f;
gamma0 = sqrt((pow(omega, 2.0) * epsilon0 * mu0) - (pow(PI, 2.0))/(pow(a, 2.0)));
gamma = sqrt((pow(omega, 2.0) * epsilon0 * epsilon * mu0 * mu) - (pow(PI, 2.0))/(pow(a, 2.0)));
khvost = 2 * gamma0 * gamma * cos(gamma * len) + (pow(gamma0, 2.0) + (gamma, 2.0)) * i * sin(gamma * len);
R = (pow(gamma0, 2.0) - pow(gamma, 2.0)) * i * sin(gamma * len)/khvost;
T = 2 * gamma * gamma0/khvost;
RR = (R * ~$R);
TT = (T * ~$T);
ff = f/1.0E9;
std::cout << ff << "\t" << RExp.at(k) << "\t" << RR << "\t" << TT << "\n";
}
return 0;
} |
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код Perl взятый за основу
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| #!/usr/bin/perl -w
use diagnostics;
use Math::Complex;
use constant PI => 3.14159;
use constant epsilon0 => 8.8541878e-12;
use constant mu0 => 1.25663706e-06;
# Границы значений epsilon - задать руками.
$numpoints=15;
#$freq1=7.8e9; $freq2=10.2e9;
$epsilon10=0; $epsilon11=81;
$epsilon20=0; $epsilon21=30;
$len=0.4e-02;
$a=2.85e-02; # 2.3
$mu=1;
$iterations=5;
# Все. Поехала автоматика. Здесь - шаги по epsilon' и epsilon"
if($input = <>)
{
($len,$a,$epsilon10,$epsilon11,$epsilon20,$epsilon21) = (split /\t/, $input, 6);
$len++;$len--;
$a++;$a--;
$epsilon10++;$epsilon10--;
$epsilon11++;$epsilon11--;
$epsilon20++;$epsilon20--;
$epsilon21++;$epsilon21--;
}
# print $len,", m ",$a,", m\n",$epsilon10," -- ",$epsilon11,"\n",$epsilon20," -- ",$epsilon21,"\n";
$NumExPoints=0;
while($input = <>){
# ($rf,$rr,$rt) = (split /\t/, $input, 3);
($rf,$rr) = (split /\t/, $input, 2);
$rf--;$rf++;$rf*=1.0e9;
$rr--;$rr++;
$rr--;$rr++;
$rr=($rr-1)/($rr+1);
# $rt--;$rt++;
@freqs=(@freqs,$rf);
@RExp=(@RExp,$rr);
# @TExp=(@TExp,$rt);
$NumExPoints++;
}
$epsilon1m=$epsilon10;
$epsilon2m=$epsilon20;
$deltaRm=0;
$epsilon=$epsilon1m-$epsilon2m*i;
for($m=0;$m<$NumExPoints;$m++)
{
$omega=2*PI*$freqs[$m];
$gamma0=sqrt(($omega*$omega*epsilon0*mu0) - (PI*PI)/($a*$a));
$gamma=sqrt(($omega*$omega*epsilon0*$epsilon*mu0*$mu) - (PI*PI)/($a*$a));
$khvost=2*$gamma0*$gamma*cos($gamma*$len)+($gamma0*$gamma0+$gamma*$gamma)*i*sin($gamma*$len);
$R=($gamma0*$gamma0-$gamma*$gamma)*i*sin($gamma*$len)/$khvost;
#$T=2*$gamma*$gamma0/$khvost;
$deltaRm+=(($R * ~$R)-$RExp[$m])*(($R * ~$R)-$RExp[$m]);
#$TT=sqrt($T * ~$T);
}
#$deltaTm=0;
print { STDERR } "Start error: ",$deltaRm,"\n\n";
for($iter=0;$iter<$iterations;$iter++)
{
$epsilon1s=($epsilon11-$epsilon10)/$numpoints;
$epsilon2s=($epsilon21-$epsilon20)/$numpoints;
print { STDERR } "Pass ",$iter,";\nepsilon1:\t",$epsilon10,"\t:\t",$epsilon11,"\t± ",$epsilon1s,"\nepsilon2:\t",$epsilon20,"\t:\t",$epsilon21,"\t± ",$epsilon2s,"\n";
for($k=0;$k<$numpoints;$k++)
{
print { STDERR } "Row ",$k,":\t";
$epsilon1=$epsilon10+$k*$epsilon1s;
for($l=0;$l<$numpoints;$l++)
{
$epsilon2=$epsilon20+$l*$epsilon2s;
$epsilon=$epsilon1-$epsilon2*i;
# Зафиксировали epsilon, теперь варьируем частоту и проверяем
# R&T.
$deltaR=0;
for($m=0;$m<$NumExPoints;$m++)
{
$omega=2*PI*$freqs[$m];
$gamma0=sqrt(($omega*$omega*epsilon0*mu0) - (PI*PI)/($a*$a));
$gamma=sqrt(($omega*$omega*epsilon0*$epsilon*mu0*$mu) - (PI*PI)/($a*$a));
$khvost=2*$gamma0*$gamma*cos($gamma*$len)+($gamma0*$gamma0+$gamma*$gamma)*i*sin($gamma*$len);
$R=($gamma0*$gamma0-$gamma*$gamma)*i*sin($gamma*$len)/$khvost;
# $T=2*$gamma*$gamma0/$khvost;
$RR=($R * ~$R);
$deltaR+=($RR-$RExp[$m])*($RR-$RExp[$m]);
}
# Отлично. Теперь у нас есть дельта новая. Осталось сверить ее с
# рекордным значением.
# print { STDERR } $epsilon,"\t",$R,"\t",$deltaR,"\n";
if($deltaR < $deltaRm)
{
$epsilon1m=$epsilon1;
$epsilon2m=$epsilon2;
$deltaRm=$deltaR;
print { STDERR } "!";
}
else
{
print { STDERR } "*";
}
}
print { STDERR } "\n"
}
# Теперь сделаем финт ушами: выберем новые границы диапазона epsilon и посчитаем в них.
$newepsilon10=$epsilon1m-($epsilon11-$epsilon10)/4;
if($newepsilon10 < 0) { $newepsilon10=0; }
$newepsilon11=$epsilon1m+($epsilon11-$epsilon10)/4;
if($newepsilon11 < 0) { $newepsilon11=0; }
$newepsilon20=$epsilon2m-($epsilon21-$epsilon20)/4;
if($newepsilon20 < 0) { $newepsilon20=0; }
$newepsilon21=$epsilon2m+($epsilon21-$epsilon20)/4;
if($newepsilon21 < 0) { $newepsilon21=0; }
$epsilon10=$newepsilon10;
$epsilon20=$newepsilon20;
$epsilon11=$newepsilon11;
$epsilon21=$newepsilon21;
print { STDERR } "Epsilon value:",$epsilon1m," : ",$epsilon2m,"\nError: ",$deltaRm,"\n\n";
}
print "# ",$epsilon1m,"\t",$epsilon2m,"\t",$deltaRm,"\n";
#$freqs=($freq2-$freq1)/$numpoints;
$epsilon=$epsilon1m-$epsilon2m*i;
for($k=0;$k<$NumExPoints;$k++)
{
# $f=$freq1+$k*$freqs;
$f=$freqs[$k];
$omega=2*PI*$f;
$gamma0=sqrt(($omega*$omega*epsilon0*mu0) - (PI*PI)/($a*$a));
$gamma=sqrt(($omega*$omega*epsilon0*$epsilon*mu0*$mu) - (PI*PI)/($a*$a));
$khvost=2*$gamma0*$gamma*cos($gamma*$len)+($gamma0*$gamma0+$gamma*$gamma)*i*sin($gamma*$len);
$R=($gamma0*$gamma0-$gamma*$gamma)*i*sin($gamma*$len)/$khvost;
$T=2*$gamma*$gamma0/$khvost;
$RR=($R * ~$R);
$TT=($T * ~$T);
$ff=$f/1.0e9;
print $ff,"\t",$RExp[$k],"\t",$RR,"\t",$TT,"\n";
} |
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