c=2*Pi*r;area=Pi*r*r;printf("该圆的周长是%.2f，面积是%.2f\n",c,area);}

c=2*PI*r;s=PI*r*r;printf("这个圆的周长是：%f\n",c);printf("这个圆的面积是：%f\n",s);

C语言求圆周长和面积方法如下：include"stdio.h"voidmain(){floatPAI=3.14,r,c,area;printf("enterradius:\n");scanf("%f",&r);c=2*PAI*r;area=PAI*r*r;printf("圆半径r=%.2f,圆周长c=%.2f,...

include<stdio.h>definepi3.1415926voidmain(){floatr,l,s;printf("请输入圆的半径:");scanf("%f",&r);l=2*pi*r;s=pi*r*r;printf("圆的周长为：%f\n,圆的面积为：%f\n",l,s);}...

C#程序：definen3.1415926#include<stdio.h>voidmain(){doubles,l,r;scanf("%lf",&r);s=n*r*r;l=2*n*r;printf("s=%lf\nl=%lf\n",s,l);//float对应%fdouble对应...

代码如下：includeintmain(){intradius;floatarea,perimeter;radius=6;perimeter=2*3.14*radius;printf("圆的周长=%f英寸\n",perimeter);area=3.14*radius*radius;printf("圆的面积=%f平方英寸\n",area);return...

include<stdio.h>intmain(){floatr;doubleC,A;scanf("%f",&r);C=2*3.1416*r;A=3.1416*r*r;printf("circumference=%.4f\narea=%.4f",C,A);return0;}附运行效果...

C#程序：usingSystem;classProgram{staticvoidMain(){doubler;//圆半径doublecircle;//圆周长doublearea;//圆面积constdoublePI=3.14159;//πConsole.Write("请输入半径：");...

printf("圆的周长=31.415926\n圆的面积=78.539815f\n");}C语言是一门通用计算机编程语言，应用广泛。C语言的设计目标是提供一种能以简易的方式编译、处理低级存储器、产生少量的机器码以及不需要任何运行环境支持便能...

include<stdio.h>intmain(){floatr,area,perimeter;printf("请你输入圆的半径r:\n");scanf("%f",&r);area=pi*r*r;perimeter=pi*r*2;printf("直径为:%0.02f\n圆的面积为:%0.03f\n周长为:%0.02f"...