5-1.c

来自「LINUX C编程实战这本书附带光盘的原代码」· C语言 代码 · 共 14 行

#include<stdio.h>

#define PI 3.1415926

int main()
{
	int    r = 100;
	double length = 2*PI*r;
	
	printf("The circumference is %f\n",length);
	
	return 0;
}