Thread: atoi related question

the below program ends when a letter is input because any non numerical value is converted to 0. What if i want to be able to type in '0' and the program not to end . Can anyone help me out?

Code:

int main(void)
{
	char num[80] = {0};
	int num1 = 0;
	do
	{
		cin >> num;
		num1 = atoi(num);
		cout << num << '\n';
	
	}while(num1 != 0);

	return(0);
}

Code:

#include <cctype>

int main(void)
{
	char num[80] = {0};
	int num1 = 0;
	do
	{
		cin >> num;
		num1 = atoi(num);
		cout << num << '\n';
	
	}while(isdigit(num));

	return(0);
}