And round about the calculation

/*设圆半径r=1.5，圆柱高h=3，求圆周长、圆面积、圆球表面积、圆球体积、圆柱体积
取小数点后2位数字*/ 
#define PI 3.14
#include <stdio.h>
#include <windows.h>
#include <math.h>
int main(){
	float r,h,yc,ym,qb,qt,zt;
	printf("请输入圆的半径和圆柱的高；\n");
	scanf("%f %f",&r,&h);
	yc = 2.0*PI*r;
	printf("圆周长是：%7.2f\n",yc);
	ym = PI*pow(r,2.0); 
	printf("圆面积是：%7.2f\n",ym);
	qb = 4*PI*pow(r,2.0);
	printf("圆球表面积是：%7.2f\n",qb);
	qt = 3.0/4*PI*pow(r,3.0);
	printf("圆球体积是：%7.2f\n",qt);
	zt = PI*pow(r,2.0)*h;
	printf("圆柱体积是：%7.2f\n",zt); 
} 

Hao strong C programming p84 seventh title
in memory of today 2020.2.29
today has a lot to do with Neco I only dare to say so much about a blessing for our children