C 输入圆半径,计算并输出圆周长和面积(圆周率取3.14).

太水了,按你写的输入输出格式声明变量,然后把这几行输入输出格式都写在主函数里

#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

#includeusingnamespacestd;classcircle{private:doubleradius;public:circle(doubler=0.0);voidinput();do

//C语言编程,输入10个数字计算平均数,并输出大于平均数的元素//作者:yubaolin//日期：20120402//功能：C语言编程,输入10个数字计算平均数,并输出大于平均数的元素#includ

这种下程序自己写很容易的,没给你做结果长度的限制,那个也很简单,用NumberFormat就可以,http://hi.baidu.com/love_12365/item/ecd0b5cb10ef8a4

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

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

#include#include#defineP3.14doublearea(doubler){returnP*r*r;}doubleCircumference(doubler){return2*P*

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

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

doubler,h,c,s,t,v,sv;sacnf("%f%f\n",&r,&h);c=2*3.14*r;s=3.14*r*r;t=4*3.14*r*r;v=(4/3)*3.14*r*r*r;sv=

ConstPI=3.14159DimrAsDoubleDimCAsDoubleDimSAsDoubleIfIsNumeric(Text1.Text)Thenr=Val(Text1.Text)C=2*P

#include#include#definePI3.14159intmain(void){floatr,h,V=0;printf("Pleaseinputr=h=\n");loop:scanf("%

数据类型不对,改为：#include<stdio.h>double s1,s,v;double area(double x){ return&nbs

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

#include"stdio.h"main(){floata,b,c,p;loop1:printf("pleaseenterpianshanga:\n");scanf("%f",&a);printf(

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

1.#include#include#definepi3.1415926voidmain(){doublex,y,z;scanf("%lf",&x);if(x>0)y=2*pi*x;z=pi*x*x；

什么语言的?C++的这样写#includevoidmain(){floatb;floatc;b=2*3.14*R*H;c=R*R*3.14*H;cout