/* sin_curve.c */
#include <stdio.h>
#include <math.h>

int main(void)
{
    double x, y, Pi=3.14159;
    int i, y2;

    for(x=0.0; x<=2.0 * Pi; x+=0.1){
	y=sin(x);
	y2 = (int)((y + 1.0)/2.0 * 80.0 );
	for(i=0;i<y2;i++){
	    printf(" ");
	}
	printf("*\n");
    }

    return 0;
}