Question

How to clears the error flag on cin in C++

Answer 1

#include <iostream>
#include <string>

using std::cout;
using std::cin;
using std::endl;

int main()
{
	std::string s;
	double d;
	
	cout << "Enter a string: ";
	cin >> s;
	cin.clear(); // clears the error flag for next I/O to work correctly
	cout << "Enter a float number: ";
	cin >> d;

	cout << s << " " << d << endl;

	return 0;
}


/*
run:

Enter a string: c++
Enter a float number: 3.14
c++ 3.14

*/

 

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