Untitled

#include <iostream>
using namespace std;
const int MinGrade = 56;

int main()
{
	int num = 0;
	cout << "Enter your choise 1-3:\n";
	cin >> num;
	switch (num)
	{
	case 1:
		char TAV;
		int Assci;
		cout << "Enter your char:\n";
		cin >> TAV;
		Assci = (int)TAV;
		if (TAV > '@' && TAV < '[' || TAV>'`' && TAV < '{')
		{
			if (Assci > '@' && Assci < '{')
			{
				if (TAV < '[')
				{
					Assci = Assci + ' ';
					cout << "the char is:" << (char)Assci;
				}

			}
			if (TAV >= '[')
			{
				Assci = TAV - ' ';
				cout << "the char is:" << (char)Assci;
			}
		}

		else
			cout << "the char is:" << (char)Assci;

		break;

	case 2:

        int num, digit, count = 0;
        cout << "Enter a number:\n";
        cin >> num;

        if ((num < -9999) || (num > -1000 && num < 1000) || (num > 9999))
        {
            cout << "Error!\n";
        }

        num = abs(num);

        cout << "Enter a digit:\n";
        cin >> digit;
        if (digit > 9 || digit <= -9)
        {
            cout << "Error!\n";
        }

        if (num % 10 == digit)
        {
            count += 1;
        }

        num /= 10;

        if (num % 10 == digit)
        {
            count += 1;
        }

        num /= 10;

        if (num % 10 == digit)
        {
            count += 1;
        }

        num /= 10;

        if (num % 10 == digit)
        {
            count += 1;
        }

        cout << "the number appears:" << count << " times";

        break;

    case 3:

        double grade1, grade2, grade3;
        cout << "Enter your 3 grades:\n";
        cin >> grade1 >> grade2 >> grade3;

        if (grade1 < MinGrade && grade2 < MinGrade && grade3 < MinGrade)
        {
            cout << "Failed!\n";
        }

        if (grade1 >= MinGrade && grade2 >= MinGrade && grade3 >= MinGrade)
        {
            cout << "The average is:\n" << (grade1 + grade2 + grade3) / 3;
        }

        if (grade1 >= MinGrade && grade2 >= MinGrade && grade3 < MinGrade)
        {
            cout << "The average is:\n" << (grade1 + grade2) / 2;
        }

        if (grade1 < MinGrade && grade2 >= MinGrade && grade3 >= MinGrade)
        {
            cout << "The average is:\n" << (grade2 + grade3) / 2;
        }

        if (grade1 >= MinGrade && grade2 < MinGrade && grade3 >= MinGrade)
        {
            cout << "The average is:\n" << (grade1 + grade3) / 2;
        }

        else
        {
            if (grade1 >= MinGrade)
                cout << "The average is:\n" << grade1;

            if (grade2 >= MinGrade)
                cout << "The average is:\n" << grade2;

            if (grade3 >= MinGrade)
                cout << "The average is:\n" << grade3;
        }
            break;
            
    default:
        cout<<"Error, try again!\n";

	}
}