time rand()을 쓰지 않은 아이템 가차 구현

enum EGrade
{
	ESTAR5,
	ESTAR4,
	ESTAR3,
	ESTAR2,
	ESTAR1,
	ENONESTAR
};

enum EItem
{
	EA_Item,
	EB_Item,
	EC_Item,
	ED_Item,
	EE_Item,
	EF_Item,
	EG_Item,
	EH_Item,
	EI_Item,
	EJ_Item,
	EK_Item,
	ENONEITEM
};

int arr[11];
void GradeSelection(vector<char>& percent, EGrade& grade, int n);
void InitialPercentArr(vector<char>& percent);

int main()
{
	vector <char> percent(100);
	EGrade grade = EGrade::ENONESTAR;
	EItem Item = EItem::ENONEITEM;
	int n, r;

	InitialPercentArr(percent);


	while (1)
	{
		for (int i = 0; i < 11; i++)
			arr[i] = 0;
		cin >> n;
		if (n == -1)
			break;

		random_shuffle(percent.begin(), percent.end());
		GradeSelection(percent, grade, n);

		for (int i = 0; i < 11; i++)
			printf("  %c : %d  ", 65 + i, arr[i]);

		cout << endl << endl;

	}

	return 0;
}

void GradeSelection(vector<char>& percent, EGrade &grade, int n)
{
	for (int i = 0; i < n; i++)
	{
		switch (percent[i % 100])
		{
		case 'A':
			if(n < 99)
			grade = EGrade::ESTAR5;
			arr[0]++;
			break;
		case 'B':
			grade = EGrade::ESTAR4;
			arr[1]++;
			break;
		case 'C':
			grade = EGrade::ESTAR4;
			arr[2]++;
			break;
		case 'D':
			grade = EGrade::ESTAR3;
			arr[3]++;
			break;
		case 'E':
			grade = EGrade::ESTAR3;
			arr[4]++;
			break;
		case 'F':
			grade = EGrade::ESTAR3;
			arr[5]++;
			break;
		case 'G':
			grade = EGrade::ESTAR2;
			arr[6]++;
			break;
		case 'H':
			grade = EGrade::ESTAR2;
			arr[7]++;
			break;
		case 'I':
			grade = EGrade::ESTAR2;
			arr[8]++;
			break;
		case 'J':
			grade = EGrade::ESTAR2;
			arr[9]++;
			break;
		case 'K':
			grade = EGrade::ESTAR1;
			arr[10]++;
			break;
		}
	}
}

void InitialPercentArr(std::vector<char>& percent)
{
	int i = 0;
	percent[0] = 'A';
	for (i = 1; i <= 3; i++)
		percent[i] = 'B';
	for (i = 4; i <= 6; i++)
		percent[i] = 'C';
	for (i = 7; i <= 11; i++)
		percent[i] = 'D';
	for (i = 12; i <= 16; i++)
		percent[i] = 'E';
	for (i = 17; i <= 21; i++)
		percent[i] = 'F';
	for (i = 22; i <= 31; i++)
		percent[i] = 'G';
	for (i = 32; i <= 41; i++)
		percent[i] = 'H';
	for (i = 42; i <= 51; i++)
		percent[i] = 'I';
	for (i = 52; i <= 61; i++)
		percent[i] = 'J';
	for (i = 62; i <= 99; i++)
		percent[i] = 'K';
}