输入半径求面积的编程

#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*

在输入半径的时候,语句改成scanf("%d",&r);不过你最好将半径定义成float型变量,格式的问题

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

PrivateSubCommand1_Click()Dima#,b#,c#,p#Me.AutoRedraw=Truea=3:b=4:c=5Doa=Val(InputBox("请输入三角形第一条边","

楼上的方法应该没错,可感觉对于表现java面向对象的特性没有表现出来,下面是我写的,应该非常清楚明了了importjava.io.BufferedReader;importjava.io.InputS

1.#includeintmain(){floatr,s,l,v;printf("请输入半径\n");scanf("%f",&r);s=3.14*r*r;l=2*3.14*r;v=4.0/3.0*3.

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

PrivateSubCommand1_Click()DimaAsLongDimiAsLongDimsAsBooleans=Truea=InputBox("请输入一个自然数","输入")'-------

#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#includemain(){doublearea,length;doubler=pi=3.1215926area=pi*r*r；length=2*pi*r；}

、s和l变量建议定义成float或double类型,另外出于养成良好的习惯,最好是将π定义成常量const输入建议scanf("%f\n",&r);输出建议使用printf(%f\n%f\n",l,s

#include<stdio.h>#define Pi 3.14159double Square(double r){  &nb

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

#include#include#defindPI3.141592654main(){doublevolume;floatradius;printf("Inputradius:");scanf("%f

packageEx2_1;importjava.util.Scanner;classRectangle{publicstaticvoidmain(Stringargs[]){doublelength,

input"输入半径:"torc=2*3.14*rs=3.14*r*rv=4*3.14*r^3/3?"圆周长=",c?"圆面积=",s?"球体积=",v

#includeusingnamespacestd;intmain(){doubler;doublev;constdoublepi=3.14159;cout再问：运行程序有一个错误..我找不到

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

        void calcation()     &

#include#includeusingnamespacestd;//圆周率constdoublePI=acos(-1);intmain(intargc,char*argv[]){\x05doubl