编写两个函数分别求圆的周长和面积

#include#definePI3.1415926doublearea(doubler){returnPI*r*r;}doubleperimeter(doubler){return2*PI*r;}i

#includemain(){inta,c,b,d;scanf("%d%d",a,b);c=a+b;d=a*b;printf("%d%d",c,d);}再问：采用函数的方法再答：先输入两个数，然后执行

这个简单：#includeusingnamespacestd;intHe(intx,inty){intz;z=x+y;returnz;}intCha(intx,inty){intz;z=x-y;ret

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

#include"stdio.h"#definePi3.1415926doublezhouchang(doubler){     doubles;&n

#include<stdio.h>double zc(double x, double y){    ret

用C语言编写函数,在主函数中输入N个人的某门课程的成绩,分别用函数求平均值最高分最低分#include<stdio.h>#defineN10//N可有自己确定

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

publicintmax(inta,intb){returna>b?a:b;}publicdoublemax(doublea,doubleb,doublec){doublet=a>b?a:b;retu

#includeintfun(intm,intn){inti,s=1;for(i=2;i

调试过了,如果需要小数,把int换成float就行了#include"stdio.h"intSub(inta,intb){intc=a-b;returnc;}intmain(){inta,b;prin

intmax_common_divisor(inta,intb){//最大公约数intlarge_num,small_num,r;if(a>b){large_num=a;small_num=b;}el

#includeintmaxY(intm,intn){inti;for(i=n;i>0;i--)if(m%i==0&&n%i==0)break;return(i);}intminB(intm,intn

intHCF(intx,inty)//定义最大公约数函数{inti,change;if(x>y)//保证x是最小数{change=y;x=change;y=x;}for(i=x;i>=1;i--)if

1圆的直径=2倍的半径=13cm周长=πR=26πcm面积=πr*r=169π2同理：直径=6cm周长=π*6=6π面积=π*3*3=9π3直径=43.96/π=43.96/3.14=14cm半径=7

怎么不给点分啊?没动力

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

1.functions=mianji(r)s=pi*r*r;end2.functionl=zhouchang(r)l=2*pi*r;end

#include//北京交通大学Lenhal//功能：计算三个正整数的最大公约数//2013/01/06main(){intfun(intaa[],intx,inty);intm,n,p,max,a[

完整程序如下：#includefun(intx,inty){intr;if(x>y){x=x;y=y;}r=x;x=y;y=r;r=x%y;while(r!=0){x=y;y=r;r=x%y;}ret