Subclassed version:
#include <iostream>
using namespace std;
class mybaseclass {
public:
virtual int get_i() = 0;
};
class myclass : public mybaseclass {
public:
myclass(int in) {
i=in;
}
int get_i() {
i++;
return i;
}
int i;
};
class otherclass : public mybaseclass {
public:
otherclass(int in) {
i = in;
}
int get_i() {
return i*i;
}
int i;
};
int main(void) {
myclass *c = new myclass(2);
double sum=0;
for(size_t n=0;n<2000000000;n++) {
mybaseclass *cc = c;
sum += (static_cast<double>(cc->get_i())/2.2);
}
cout << sum << endl;
delete c;
}
Templated version:
#include <iostream>
using namespace std;
template<class t>
class myclass {
public:
myclass(int in) {
i=in;
}
inline int get_i() {
i++;
return i;
}
int i;
};
template<class t>
class otherclass {
public:
otherclass(int in) {
i = in;
}
inline int get_i() {
return i*i;
}
int i;
};
int main(void) {
myclass<int> *c = new myclass<int>(2);
double sum=0;
for(size_t n=0;n<2000000000;n++) {
sum += (static_cast<double>(c->get_i())/2.2);
}
cout << sum << endl;
delete c;
}
$ g++ small_classed.cpp -O3;time ./a.out
9.09091e+17
real 0m21.151s
user 0m20.909s
sys 0m0.072s
$ g++ small_templateclassed.cpp -O3;time ./a.out
9.09091e+17
real 0m20.736s
user 0m20.527s
sys 0m0.064s
