#include <stdio.h>
#include <stdbool.h>
#include <math.h>
int main(void)
{
	int x;
	float a, y = 0;
	printf("%s", "Enter coefficient a=" );
	scanf_s(&a);
	y = sin(a);
	for (x = 1; sin(a * (x + 1)) > 0; x++)
	{
		y = sin(a * x);
		printf("%s%i %s%f\r\n", "x=", x, "y=", y);
	}
	return 0;
}