main() {
float  radius, length, area, pi = 3.14159;
radius = 1.5;
length = 2 * pi * radius;				/*Բܳ*/
area = pi * radius * radius;		  		/*Բ*/
printf("radius=%f\n",radius);			/*Բ뾶*/
printf("length=%7.2f,area=%7.2f\n",length,area); 	/*Բܳ*/
}
