도전!

#include<stdio.h>
#include<math.h>

#define WIDTH 19
#define HEIGHT 100
#define PI (3.141592)


int isEqual(double d1, double d2, double e);

int main(int argc, char *argv[])
{
    double x=0.0;
    double y=0.0;
    int col=0,row=0;
    printf("%-*d%1d%*d\n",WIDTH,-1,0,WIDTH,1);
    for(row=0;row<WIDTH*2+1;row++) printf("-");
    printf("\n");
    for(col=0;col<HEIGHT;col++)
    {
        y=sin(2*PI*x);
        for(row=0;row<WIDTH*2+1;row++)
        {
            if(isEqual((double)row,(y+1.0)*(double)WIDTH,0.5))
                printf("*");
            else if(row == WIDTH)
                printf("|");
            else
                printf(" ");
        }
        x += 0.05;
        printf("\n");
    }
}

int isEqual(double d1, double d2, double e)
{
    if( (d1-d2>0.0?d1-d2:d2-d1)<e )
        return 1;
    return 0;
}

-1                 0                  1
---------------------------------------
                   *                   
                   |     *             
                   |          *        
                   |              *    
                   |                 * 
                   |                  *
                   |                 * 
                   |              *    
                   |          *        
                   |     *             
                   *                   
             *     |                   
        *          |                   
    *              |                   
 *                 |                   
*                  |                   
 *                 |                   
    *              |                   
        *          |                   
             *     |                   
                   *                   
                   |     *             
                   |          *        
                   |              *    
                   |                 * 
                   |                  *
                   |                 * 
                   |              *    
                   |          *        
                   |     *             
                   *                   
             *     |                   
        *          |                   
    *              |                   
 *                 |                   
*                  |                   
 *                 |                   
    *              |                   
        *          |                   
             *     |                   
                   *                   
                   |     *             
                   |          *        
                   |              *    
                   |                 * 
                   |                  *
                   |                 * 
                   |              *    
                   |          *        
                   |     *             
                   *                   
             *     |                   
        *          |                   
    *              |                   
 *                 |                   
*                  |                   
 *                 |                   
    *              |                   
        *          |                   
             *     |                   
                   *                   
                   |     *             
                   |          *        
                   |              *    
                   |                 * 
                   |                  *
                   |                 * 
                   |              *    
                   |          *        
                   |     *             
                   *                   
             *     |                   
        *          |                   
    *              |                   
 *                 |                   
*                  |                   
 *                 |                   
    *              |                   
        *          |                   
             *     |                   
                   *                   
                   |     *             
                   |          *        
                   |              *    
                   |                 * 
                   |                  *
                   |                 * 
                   |              *    
                   |          *        
                   |     *             
                   *                   
             *     |                   
        *          |                   
    *              |                   
 *                 |                   
*                  |                   
 *                 |                   
    *              |                   
        *          |                   
             *     |