ass 2.cpp

this code is code c++. have many lesson

#include <iostream>

using namespace std;

int main()
{
	int grade, input;
	
	cout << "===================" << endl;
	cout << "Choose Your Mark(s)" << endl;
	cout << "1.)Input mark(s)" << endl;
	cout << "2.)Exit" << endl;
	cout << "===================" << endl;
	
	cout << "You Choose : ";
	cin >> input;
	
	switch(input){
		case 1 :	
				cout << "Your marks are : ";
				cin >> grade;
					if (grade <= 49 && grade >=0){
					cout << "You Get F !!!" << endl;
					} else if (grade >= 50 && grade <= 59){
						cout << "You Get D !!!" << endl;
						} else if(grade >=60 && grade <= 69){
							cout << "You Get C !!!" << endl;
							} else if (grade >=60 && grade <= 69){
								cout << "You Get C !!!" << endl;
								} else if (grade >= 70 && grade <= 79){
									cout << "You Get B !!!" << endl;
									} else if (grade >=80){
										cout << "You Get A !!!" << endl;
										}

		
				}
	
system("pause");
return 0;
}