printf("直径为:%0.02f\n圆的面积为:%0.03f\n周长为:%0.02f",2*r,area,perimeter);return 0;}
include <stdio.h>#include <stdlib.h> float perimeter(float r){ const float pi=3.14; float _perimeter=2*pi*r; printf("%g\n",_perimeter); return (_perimeter);}float area(float r){ float pi=3.14; float _area=pi*r*r; printf("%g\n",_area); ...