C语言编写长方形周长,面积怎么写

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

#include"stdio.h"#include"math.h"voidmain(){unsignedchara,b,c,max;doubles,cosab;puts("请输入三条边长：");sca

长方形:周长=(长+宽)×2面积=长×宽我猜你还想说正方形的正方形周长=边长×4面积=边长×边长圆的要么?再问：再问：这道题咋做再答：拍的都不完整。。小明减去的面积是8周长是12剩下的周长是36单位C

voidmain(){floatr,s,l;floatpi=3.1415;printf("输入一个圆的半径:\n");scanf("%f",&r);if(

周长除4=边长边长乘边长=面积

intarea(intx,inty){returnx*y;}intgri(intx,inty){return2*(x+y);}

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

在vc++编译的.#includevoidmain(){floatl;printf("enterperimeter:");scanf("%f",&l);printf("square=%.2f\n",l

#include <stdio.h>#include <math.h>//double sin(double x);#define&nb

#includeintmain(){doublea=1.5;doubleb=2.3;doublec,d;c=a+a+b+b;d=a*b;printf("面积为%.2f,周长为%.2f",c,d);re

printf（“请输入上底下底高：”）；这句的分号错了,应该是;而不是；另外,你追问楼上那位的代码里,也是全角半角符号的错误,还有后面printf("所求摄氏温度:")：,应该是分号;,不是冒号：初学

#include#definePI3.1415926intmain(){floatL;floatS=0;printf("Pleaseinputcircum:");scanf("%f",&L);S=L*

p=(a+a+a)/2.0;转换成浮点型再把结果赋给p

.就知道一个周长,怎么求面积啊?N种可能啊满意请采纳

#include//doubleellipse_area(doublea,doubleb);intmain(void){doublea,b;doubles;printf("请输入椭圆的半长轴a,半短轴

假设知道三角形的三边长为a,b,c.程序如下：#include#includedoublearea(doublea,doubleb,doublec){doublearea=0,s=0;s=(a+b+c

#includeintmain(){intlength,width,perimeter;printf("长：");scanf("%d",&length);printf("宽：");scanf("%d"

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

两个数,只可能是底和高吧.#includevoidmain(){floatSide,Height;//底和高floatSpace;printf("pleaseinputSideanditsHeight

m=2a+2b;应该改成m=2*a+2*b;程序中2a,2b是不允许的,没有意义的.