Mega Code Archive
Use member function reference function adaptor
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#include <iostream>
#include <vector>
#include <algorithm>
#include <functional>
using namespace std;
class Numbers {
int val;
public:
Numbers() {
val = 0;
}
Numbers(int x) {
val = x;
}
bool showval() {
cout << val << " ";
return true;
}
bool isPrime() {
for(int i = 2; i <= (val/2); i++)
if(!(val%i))
return false;
return true;
}
bool isEven() {
return (bool) !(val % 2);
}
bool isOdd() {
return (bool) (val %2);
}
};
int main()
{
vector<Numbers> vectorObject(10);
vector<Numbers>::iterator end_p;
int i;
for(i = 0; i <10; i++)
vectorObject[ i ] = Numbers(i+1);
cout << "Sequence contains: ";
for_each(vectorObject.begin(), vectorObject.end(), mem_fun_ref(&Numbers::showval));
cout << endl;
// remove the primes
end_p = remove_if(vectorObject.begin(), vectorObject.end(), mem_fun_ref(&Numbers::isPrime));
cout << "Sequence after removing primes: ";
for_each(vectorObject.begin(), end_p, mem_fun_ref(&Numbers::showval));
cout << endl;
for(i = 0; i <10; i++)
vectorObject[ i ] = Numbers(i + 1);
end_p = remove_if(vectorObject.begin(), vectorObject.end(), mem_fun_ref(&Numbers::isEven));
cout << "Sequence after removing even values: ";
for_each(vectorObject.begin(), end_p, mem_fun_ref(&Numbers::showval));
cout << endl;
for(i = 0; i < 10; i++)
vectorObject[ i ] = Numbers(i + 1);
end_p = remove_if(vectorObject.begin(), vectorObject.end(), mem_fun_ref(&Numbers::isOdd));
cout << "Sequence after removing odd values: ";
for_each(vectorObject.begin(), end_p, mem_fun_ref(&Numbers::showval));
return 0;
}
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