Thread: gets() Problem

The read_integer function in the code below is weird. The first time the program runs through the loop it works just fine, taking in 2 integers and multiplying and adding them. However, if you choose to continue. It won't let you enter the first deque... It just prints out the "Please type a large integer:" and then prints it again immediately afterwards. It will allow you to enter a deque after that. I ran through it with the Debugger and it seems to be a problem with gets. But I could be wrong! Any suggestions?

Code:

#include <iostream>
#include <cstdio>
#include <deque>

using namespace std;


typedef deque<int> INTDEQUE;

int read_integer(INTDEQUE &, int count);
void write_integer(INTDEQUE &);
void add_integers(INTDEQUE &sum, INTDEQUE X, INTDEQUE Y);
void multiply_integers(INTDEQUE &product, INTDEQUE X, INTDEQUE Y, int count_A, int count_B);

int main(void)
{

	INTDEQUE  A,B,S,P;
	int count = 0, count2=0;
	int count_A, count_B;

	char quit = 'a';

	do{

	count_A = read_integer(A, count2);
	count_B = read_integer(B, count2);

	add_integers(S,A,B);
	multiply_integers(P,A,B, count_A, count_B);

	cout << endl;
	cout << "The first integer is: ";
	write_integer(A);
	cout << "The second integer is: ";
	write_integer(B);
	cout << "The sum is: ";
	write_integer(S);
	cout << "The product is: ";
	write_integer(P);

	printf("\nQ - Quit\nC - Continue\n");
	scanf("%c", &quit);
	}while (quit != 'Q');  

	return 0;
}

int read_integer(INTDEQUE &X, int count2)
{
	char line[100];
	char * pline;

	printf("Please type a large integer:\n");
	gets(line);
	fflush(stdin);

	pline = line;

	while(*pline != '\0')
	{
		if (*pline >='0' && *pline <= '9')
		{
			X.push_back(*pline -'0');
			count2++;
		}
		pline++;
	}

	return count2;
}