How can I fix this code?

Question

this is the code:
#include <iostream>
using namespace std;

class myClass {
public:
myClass(string nm) {
setName(nm);
}
void setName(string x) {
name = x;
}
string getName() {
return name;
}
private:
string name;
};

int main() {
myClass ob1("David");
myClass ob2("Amy");

int a;
cout << "enter your password";
cin >> a;
if( a == 33){
cout << "ok, enter another one";
cin >> a;

cout << ob1.getName();

}
else{
cout << "oh well";

}
}
1. How do I fix the if statement?
2. How can I make it so that if a certain digit is not entered, this( cout << "enter your password";
cin >> a;) will not be output onto the screen. For example, if the person was suppised to enter 5, but entered 6, how can I erase cout << "enter your password";
cin >> a; so that it wont be output?

Answer 1

try with while loop and setstate....
something like below:

cout << "Enter password" << endl;
cin >> a;

while(a!=5)
{
cout.setstate(ios_base::failbit);
cout << "Invalid password... Renter" <<endl;
cout.clear();
cin >> a;
}

Cout<< "Successful login" << endl;

This might help...

Answer 2

fail bit is set when there is logical error in I/o... We are forcing to ignore output till the time it is cleared..

for more information on setstate :

http://www.cplusplus.com/reference/ios/ios/setstate/

Answer 3

@Ketan Lalcheta
What does this part mean?
cout.setstate(ios_base::failbit);