Find the correct identifiers out of the following, which can be used for naming variables, constants or functions in a C++ program:

While, for, Float, new, 2ndName, A%B, Amount2, _Counter

Observe the following program very carefully and write the names of those header files (s), which are essentially needed to compile and execute the following program successfully :

typedef char TEXT[80];
void main()
{
	TEXT Str[] = 'Peace is supreme';
	int Index=0;
	while (Str[Index]!='\0'){
		if (isupper(Str[Index])){
			Str[Index++]='#';
		}
		else{
			Str[Index++]='*';
		}
	}
	puts(Str);
}

Observe the following C++ code very carefully and rewrite it after removing any/all syntactical errors with each correction underlined.

Note: Assume all required header files are already being included in the program.

#Define float Max=70.0;
Void main()
{
	int Speed
	char Stop='N';
	cin>>Speed;
	if Speed>Max
		Stop='Y';
	cout<<Stop<<end;
} 

#define Max 70.0        //Error 1,2,3
void main()            //Error 4
{
     int Speed;       //Error 5
     char Stop='N';
     cin>>Speed;
     if (Speed>Max){ //Error 6
         Stop='Y';
     }
 cout<<Stop<<endl; //Error 7
}

Write the output of the following C++ program code:
Note: Assume all required header files are already being included in the program.

void Position(int & C1,int C2=3)
{
	C1+=2;
	C2+=Y;
}
void main()
{
	int P1=20, P2=4;
	Position(P1);
	cout<<P1<<','<<P2<<end1;
	Position(P2,P1);
	cout<<P1<<','<<P2<<end1;
}

Write the output of the following C++ program code:
Note: Assume all required header files are already being included in the program.

class Calc
{
	char Grade;
	int Bonus;
public:
	Calc() {Grade='E';Bonus=0;}
	void Down(int G)
	{
		Grade-=G;
	}
	Void Up(int G)
	{
		Grade+=G;
		Bonus++;
	}
	void Show()
	{
		cout<<Grade<<'#'<<Bonus<<end1;
	}
};
void main()
{
	Calc c;
	C.Down(2);
	C.Show();
	C.Up(7);
	C.Show();
	C.Down(2);
	C.Show();
}