vector.cc

// header.hh

class cell // cell class
{
public:
	double x_loc;
};

class BaseDomainClass
{
public:

	// BaseDomain Members
	std::vector< std::unique_ptr< cell >> cellVect;

	// BaseDomain functions
	std::unique_ptr< cell > getCell( int i, int j );

};


// In main.cc

std::unique_ptr< cell >BaseDomainClass::getCell(
	int const i,
	int const j
)
{
	int vectorIndex = i + j;
	return cellVect[ vectorIndex ];
}

#include <vector>

class cell // cell class
{
public:
    double x_loc;
};

class BaseDomainClass
{
public:

    // BaseDomain Members
    std::vector< cell * > cellVect;

    // BaseDomain functions
    cell * getCell( int const i, int const j );

};


// In main.cc

cell * BaseDomainClass::getCell(
    int const i,
    int const j
)
{
    int vectorIndex = i + j;
    return cellVect[ vectorIndex ];
}


int main() {
    }