Simply Confusing Sortin/Printing

[power_computer]

I have the following code snippet which is the most important as you can see I have two arrays defined of two different classes, my main agenda is printing them both out in a single list in ascending order based on the .GetDay value in each array, however when read from file both arrays are already in ascending order so I need to combine the two when printing I have already tried putting them into an array oof structs which worked perfectly fine till I begin a new loop for printing when printing a last member of the struct it caused the program to crash for some odd reason due to read or write error on the memory so I am assuming i have memory leak somewhere when I did that

int main()
{	
	Service stran[MAX];
	Merchandise mtran[MAX];
	ifstream fin;
	string month, tcustNumber, sDescription, mItemNumber;
	float tAmount;
	char type;
	int i, j, tDay, mQuantity, sEmpNumber, year;

	fin.open("transaction.data");
	
	fin>>month>>year;
	
	while(!fin.eof())
	{
		fin>>type;
		
		if(type == 'M')
		{
			fin>>tDay>>tAmount>>tcustNumber>>mItemNumber>>mQuantity;
			mtran[i].Initialize(tDay, tAmount, tcustNumber, mItemNumber, mQuantity);
			i++;
		}
		else
		{
			fin>>tDay>>tAmount>>tcustNumber>>sEmpNumber;
			getline(fin,sDescription);
			stran[j].Initialize(tDay, tAmount, tcustNumber, sEmpNumber, sDescription);
			j++;
		}
		
	}
	fin.close();

So in short was is the best way to print these two arrays out in a single list in ascending order ?