C輸出心形

    int c = 0;
    
    for (float y = 1.5f; y > -1.5f; y -= 0.1f) 
    {
	    for (float x = -1.5f; x < 1.5f; x += 0.05f) 
	    {
	        c += 1;

	    	 float a = x * x + y * y - 1;
	    	 
	    	 if(a * a * a - x * x * y * y * y <= 0.0)
	    	 {
	    	     if(c%3==0)
	    	     {
                    putchar('2');	    	         
	    	     }
	    	     else if(c%3==1)
	    	     {
	    	        putchar('0');
	    	     }
	    	     else if(c%3==2)
	    	     {
	    	        putchar('5');
	    	     }
	    	 }
	    	 else
	    	 {
	    	     putchar(' ');
	    	 }
	    	 
	    }
	    
    	putchar('\n');
    }

https://www.zhihu.com/question/20187195