#include
#include
#include
class student 
{
	int roll;
	char name[25];
	char add [25];
	char *city;
	public: student()
	{
		cout<<"welcome in the student information system"<>roll;
		cout<<"\n enter the student name";
		cin>>name;
		cout<<\n enter ther student address";
		cin>>add;
		cout<<"\n enter the student city";
		cin>>city;
	}
	void putdata()
	{
		cout<,"\n the student roll no:"<>sub1:
		cout<<"\n enter the marks2:";
		cin>>sub2;
		cout<<\n enter the marks3:";
		cin>>sub3;
	}
	void output()
	{
		putdata();
		cout<<"\n marks1:"<>ch;
		switch (ch)
		{
			case 1:
			m1.input();
			count++;
			break;
			
                        case2:
			m1.output();
			break;

			case3:
			m1.calculate();
			break;
		}
	} while (ch!=4);
}

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