输入圆的半径r,求其周长并输出.的c语言程序

#includeintmain(){floatr,s,l;scanf("%f",&r);s=3.14*r*r;l=2*3.14*r;printf("s=%f,l=%f\n",s,l);return0;

CLEARSETTALKOFFINPUT"请输入半径:"TORL=2*PI()*RS=PI()*R*R"半径为R的圆的周长为:",L"半径为R的圆的面积为:",SSETTALKON

varch:char;//第一行输入的字符r,x,y,z,a,b:longint;//r为半径,x,y,z为三角形边长,a,b为长宽p:double;//p为海伦公式里的一个量beginreadln(

voidmain(){floatr,s,l;floatpi=3.1415;printf("输入一个圆的半径:\n");scanf("%f",&r);if(

#include#definePI3.1415926\x05\x05voidmain()\x05{\x05doubler,s;scanf("%f",&r);s=PI*r*r;\x05printf("A

#include#includeusingnamespacestd;classCircle{doubler,Area,Circumference;public:Circle(doublea=0);Ci

main(){intn,a;scanf("%d",&n);a=n%3;printf("%d%%3=%d\n",n,a);}

没有安装VF大体思路：建立一个文本,用于输入半径r,一个命令按钮求周长,并输出在另一文本中程序较简单：C=2*3.14*

要求用什么语言啊?求简单写个在matlab上跑的：r=input('r=?');D=2*pi*rS=pi*r*r再问：c语言呀哥哥再答：#include#includemain(){floatpi=3

PrivateSubCommand1_Click()DimrAsSingleDimcAsSingleDimsAsSingler=Val(Text1.Text)c=2*3.14159*rs=3.1415

#includeintmain(){doubleR;while(scanf("%lf",&R)!=EOF){printf("%lf\n",R*R*3.14);}return0;}

面积最大时是正方形,对角线等于直径=2r,边长=√2r,周长=4√2

#includeintmain(){intr=0;floata=0,l=0;scanf("%d",&r);a=r*r*3.14;l=r*2*3.14;printf("面积:%f,周长:%f",a,l)

#include#definepai3.15149256voidmain(){doubler,c,s;printf("pleaseinputr\n")scanf("%lf",&r);printf("c

#include"stdafx.h"#include#includeusingnamespacestd;classCircle{doubler,Area,Circumference;public:Ci

constpi=3.1416subcircle（byvalrassingle,Lassingle,aassingle,VASSINGLE）L=2*pi*rA=pi*r*rV=4/3*r*r*r*pie

#include"stdio.h"#definePI3.141592653//定义πintmain(void){floatC,A,V,r;printf("请输入半径：");//提示输入scanf("%

#...intr,b,dsin

C编程求助编写一个基于对象的程序：输入半径,计算圆的周长和面积并输出实现#include

用C语言写一段：#include“stdio.h”#definePI3.1416voidmain（）{intr；floatc,s；scanf("%d",&r);c=PI*2*r；s=PI*r*r；pr