Exploring the Transform Function and Operator Classes, C++ (gcc)

Exploring the Transform Function and Operator Classes

//Using transform function

#include <iostream>
#include <iomanip>
#include <algorithm>
#include <numeric>
#include <iterator>

#include <vector>
#include <set>

using namespace std;

typedef vector<double>DVect;
typedef DVect::iterator dIterator;

typedef set<double, less<double> >DSet;
typedef DSet::iterator sIterator;

ostream& operator <<(ostream& out, const DVect& v){
 copy(v.begin(), v.end(), ostream_iterator<double>(out, " "));
 return out;
};

int main()
{
 int sz = 11;
 DVect fv(sz);
 DVect rv;
 DVect out1(sz);
 
 iota(fv.begin(), fv.end(), 1);
 
 double data1[11] = {1, 1.50, 3, 5, 7, 9, 11, 13, 14, 16, 12}; 
 copy(data1, data1 + sz, inserter(rv, rv.begin()));
 
 cout.setf(ios::showpoint) << cout.precision(3);
 cout << "\nfv:\t[ ";
 for(auto i : fv)
 cout << i << " ";
 cout << "]";
 //
 // reverse it
 //
 cout << "\npv:\t[ ";
 for(auto i : rv)
 cout <());
 cout << "fv + pv:\t[ ";
 for(auto i:out1)
 cout << i << " ";
 cout << "]\n";

// substract corresponding elements of fv and rv sequences
 // 
 transform(fv.begin(), fv.end(), rv.begin(), out1.begin(), minus<double>());
 cout << "fv - pv:\t[ ";
 for(auto i:out1)
 cout <());
 cout << "fv * pv:\t[ ";
 for(auto i:out1)
 cout <());
 cout << "fv / pv:\t[ ";
 cout.setf(ios::showpoint) << cout.precision(3);
 for(auto i:out1)
 cout << i << " ";
 cout << "]\n";

// modulus of corresponding elements of fv and rv sequences
 // 
 transform(fv.begin(), fv.end(), rv.begin(), out1.begin(), modulus<int>());
 cout << "fv % pv:\t[ ";
 cout.unsetf(ios::showpoint);
 for(auto i:out1)
 cout << i << " ";
 cout << "]\n\n";

// equal_to fv == rv
 // 
 transform(fv.begin(), fv.end(), rv.begin(), out1.begin(), equal_to<double>());
 cout << "fv == pv:\t[ ";
 cout.unsetf(ios::showpoint);
 for(auto i:out1)
 cout << i << " ";
 cout << "]\n";

// greater_equal fv >= rv
 // 
 transform(fv.begin(), fv.end(), rv.begin(), out1.begin(), greater_equal<double>());
 cout << "fv >= pv:\t[ ";
 cout.unsetf(ios::showpoint);
 for(auto i:out1)
 cout << i << " ";
 cout << "]\n";

// less_equal fv <= rv
 // 
 transform(fv.begin(), fv.end(), rv.begin(), out1.begin(), less_equal<double>());
 cout << "fv <= pv:\t[ ";
 cout.unsetf(ios::showpoint);
 for(auto i:out1)
 cout << i << " ";
 cout << "]\n";

// less fv < rv
 // 
 transform(fv.begin(), fv.end(), rv.begin(), out1.begin(), less<double>());
 cout << "fv < pv:\t[ ";
 cout.unsetf(ios::showpoint);
 for(auto i:out1)
 cout << i << " ";
 cout << "]\n";

// greater fv > rv
 // 
 transform(fv.begin(), fv.end(), rv.begin(), out1.begin(), greater<double>());
 cout << "fv > pv:\t[ ";
 cout.unsetf(ios::showpoint);
 for(auto i:out1)
 cout << i << " ";
 cout << "]\n\n";

// logical_and fv && rv
 // 
 transform(fv.begin(), fv.end(), rv.begin(), out1.begin(), logical_and<double>());
 cout << "fv && pv:\t[ ";
 cout.unsetf(ios::showpoint);
 for(auto i:out1)
 cout << i << " ";
 cout << "]\n";

// logical_or fv || rv
 // 
 transform(fv.begin(), fv.end(), rv.begin(), out1.begin(), logical_or<double>());
 cout << "fv || pv:\t[ ";
 cout.unsetf(ios::showpoint);
 for(auto i:out1)
 cout << i << " ";
 cout << "]\n";

// logical_not !fv
 // 
 transform(fv.begin(), fv.end(), out1.begin(), logical_not<double>());
 cout << "!fv:\t\t[ ";
 cout.unsetf(ios::showpoint);
 for(auto i:out1)
 cout << i << " ";
 cout << "]\n\n";

// bit_or fv | rv
 // 
 transform(fv.begin(), fv.end(), rv.begin(), out1.begin(), bit_or<bool>());
 cout << "fv | pv:\t[ ";
 cout.unsetf(ios::showpoint);
 for(auto i:out1)
 cout << i << " ";
 cout << "]\n";

// bit_xor fv ^ rv
 // 
 transform(fv.begin(), fv.end(), rv.begin(), out1.begin(), bit_xor<bool>());
 cout << "fv ^ pv:\t[ ";
 cout.unsetf(ios::showpoint);
 for(auto i:out1)
 cout << i << " ";
 cout << "]\n";

// bit_and fv & rv
 // 
 DVect out2(sz);
 transform(fv.begin(), fv.end(), rv.begin(), out2.begin(), bit_and<bool>());
 cout << "fv & pv:\t[ ";
 cout.unsetf(ios::showpoint);
 for(auto i:out2)
 cout << i << " ";
 cout << "]\n";
 
 DVect b1{1, 1, 1, 0, 1, 0, 0, 0, 1};
 DVect b2{1, 0, 0, 1, 1, 1, 0, 2, 3};
 DVect out3(b1.size());
 
 cout << "\nb1:\t\t[";
 for(auto i : b1)
 cout << i << " ";
 cout << "]";
 
 cout << "\nb2:\t\t[";
 for(auto i : b2)
 cout <());
 
 cout << "\nb1 & b2:\t[";
 for(auto i : out3)
 cout <());
 
 cout << "\nb1 | b2:\t[";
 for(auto i : out3)
 cout <());
 
 cout << "\nb1 ^ b2:\t[";
 for(auto i : out3)
 cout << i << " ";
 cout << "]\n";
 
 
}


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