1. 输入圆的半径r,计算圆的周长与面积并输出.

#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

#definePI3.1416//后面不需要;#include"stdio.h"//注意关键字之间要有空格intmain(){floatr,s,c;scanf("%f",&r);c=2*PI*

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

usingSystem;usingSystem.Collections.Generic;usingSystem.Linq;usingSystem.Text;namespaceConsoleApplic

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*

PublicSubcommand1_click()dimrasintegerr=val(inputbox("请输入半径"))s=3.1415926*r^2msgbox"圆的面积为:"&sendsu

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

#includevoidmain(){floatr,d,Cs;cout

PrivateSubCommand1_Click()DimbjAsSingleDimzzAsSingleDimmjAsSinglebj=CSng(Text1.Text)Ifbj

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

#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

#includemain(){inti;floatr;floats;floath;floatv;printf("请输入半径：\n");scanf("%f",&r);printf("如果是圆请输入1,如

functionCirclrArea(r){varr=window.prompt("请输入数据");/*窗口输入*/varCirclrArea=r*r*3.14;document.write(Circ

他们的答案好像都没有输出结果.Dim r, s, c As IntegerPrivate Sub Command1_Click()

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("%

#includeclasscircle{private:intr;public:voidinput(){cout

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