编写函数,计算圆面积.要求在主函数中输入圆半径,调用函数计算圆面积,并输出圆面

#includemain(){\x09floatS(floatr);\x09floatr;\x09printf("inputr:");\x09scanf("%f",&r);\x09printf("圆面

FunctionS(rAsSingle)AsSingle'Function过程Constpi=3.1415926535898S=pi*r^2EndFunctionPrivateSubForm_Clic

#includeintfun(intn){ints=0;while(n){s+=n%10;n=n/10;}returns;}main(){intn;scanf("%d",&n);printf("%d\

#includedoublecalRectArea(doubledWidth,doubledHeigh){returndWidth*dHeigh;}voidmain(){doublea,b,mul;s

#definePI3.14#includeusingnamespacestd;doublearea(floati){return(PI*i*i);}doublecircumference(floati

是用C语言么?我用递归调用帮你写个#includevoidmain(){intfac(intn);inta;floatb;prinf("inputanintegernumber:")scanf(%d,

很高兴回答你的问题!#includeintfun(intn,intx){if(n==0)return1;intmul=x;for(inti=n;i>1;i--)mul*=x;returnfun(n-1

#includeusingnamespacestd;floatmianji(floata,floatb){returna*b;}floatzhouchang(floata,floatb){return

#include<stdio.h>#include<stdlib.h>#define Pi 3.14159double square(double

#include <stdio.h>float area(float r){  return 3.14159 *&nb

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

intmax(inta,intb)//比较大数,返回值为大数{if(a>b){returna;}else{returnb;}}voidmain(){intx=9;inty=5;intz=max(x,y

#includeintgetArea(intlen){\x09returnlen*len;}intmain(){\x09intn;\x09intarea;\x09\x09printf("请输入边长:\

function [ s ] = solve_area( a,b,c )  p=(a+b+c)./2;&nbs

privatefunctions(byvalrasdouble)asdoubles=PI*r*rendfunction

#includemain(){intn,i,j,k;while(scanf("%d",&n)==1){if(n==1||n==2){printf("%d\n",1);cont

#include"stdio.h"doublesum(intn){if(n>1){return(double)n/(double)(2*n+1)+sum(n-1);}else{return(doubl

voids(folata,folatb,folatc){folatp;p=(a+b+c)/2;S=√[p(p-a)(p-b)(p-c)];returns;}

//使用海伦公式#include/*ForIO*/#include/*Forsqrt()*/intmain(void){doublea,b,c,p,s;printf("请输入a,b和c：");scan

#include#includeusingnamespacestd;classSanJiaoXing{private:doublea,b,c;public:doubleArea();SanJiaoXi