problem 1.c

北大青鸟软件工程师教学ppt的教师用书源代码

#include <stdio.h>
#define PI 3.14;
void calcCircle();
void main()
{
   	calcCircle();
}
void calcCircle()
{
	float radius;
    double area;
	double circum;
	double pi = PI;
	
    printf("请输入圆的半径： ");
    scanf("%f",&radius);
	area = pi * radius * radius;
	circum = 2.0 * pi * radius;
	printf("圆的半径为%3.2lf\n面积=%3.2f\n周长=%3.2lf\n",radius, area, circum);
}