infinite loop

my program enter an infinite loop if the user inputs invalid data?

I check the FAQ section and I got this code, I say super I fix my problem, but when I try to run my program I get 3 errors:

Code:

#include <limits>

{
	int a = 0;
	while (cout << "Please Enter the Number of Clases Compleated: " && !(cin >> a))
		{
		 cout << "\nInvalid input" <<endl;
		 cin.clear();
		 cin.ignore(std::numeric_limits <int>::max(), '\n');
		}

	cout << "\n";
	if (a < 2)
		info[j].clas[0] = 'C';
	else if (a>=2 && a<=4)
		info[j].clas[0] = 'B';
	else if (a>4)
		info[j].clas[0] = 'A';
	info[j].clas[1] = '\0';
}

-not enough actual parameters for macro 'max'
-error C2589: '(' : illegal token on right side of '::'
-error C2143: syntax error : missing ')' before '::'
-error C2059: syntax error : ')'

Please help, the project is due next week. everything work but this section.

have you included <limits>?

Thank you for reply Stoned_Coder

Yes

#include <limits>

Code:

#include<limits>
#include<iostream>
using namespace std;
int main(void)
{
    int a=0;
	while (cout << "Please Enter the Number of Clases Compleated: " && !(cin >> a))
		{
		 cout << "\nInvalid input" <<endl;
		 cin.clear();
		 cin.ignore(std::numeric_limits <int>::max(), '\n');
return 0;		}
}

This compiles and runs fine for me.

if I compile and run the program by it self like manofsteel972 did, it works fine like he said. but when I included that to my program, wich is about 600 lines, I get the error. I'm using this files:

#include <iostream>
#include <ctime>
#include <stdlib.h>
#include <cmath>
#include <iomanip.h>
#include <conio.h>
#include <stdio.h>
#include <windows.h>
#include <string>
#include <limits>

I think one of those files is the problems, but I need for the others function in the program.

Is there another way to do it? I have been working in this part for hours. I tried everything.

Help please!!