一道练习题，菜鸟级的，请高手解决~~

[xingwenbo]

编写一个程序，读取圆的半径并计算圆的直径，周长和面积。常量“pi”的值取3.14159。所有的计算都在printf语句中完成，并使用转换说明符%f。


谢谢高手帮忙写个源程序让小弟参考下，谢谢了~~~

[李马]

#include <stdio.h>
#define PI 3.14159
void main()
{
float r;
scanf("%f", &r);
printf("d = %f\n", 2 * r);
printf("c = %f\n", PI * 2 * r);
printf("s = %f\n", r * r * PI);
}

[daizh]

#include <stdio.h>

void main()
{
const double PI = 3.14159;

int r;

printf("请输入圆的半径：");

scanf("%d",&r);

printf("圆的直径：%d 圆的面积：%f 圆的周长：%f \n",2*r,PI*r*r,2*PI*r);
}

[zhuixe]

#include<stdio.h>
#define PI 3.14159
void main()
{
float BanJing;
printf("ShuRu BanJing:");
scanf("%f",&BanJing);
printf("\nBanJing=%f,ZhiJing=%f,ZouChang=%f,MianJi=%f",BanJing,2*BanJing,2*PI*BanJing,PI*BanJing*BanJing);
}

[falkon]

随便些一个：
#include<stdio.h>
#define PI 3.14159
main()
{ float r,per,dia,s;
printf("please input the value of r (example r=1):");
scanf("r=%f",&r);
printf("the Diameter of circle is:%f\n",dia=2*r);
printf("the perimeter of circle is:%f\n",per=2*PI*r);
printf("the area of the circle is:%f\n",s=PI*r*r);
return 0;
}

[psprite]

#define pi 3.014159
main()
{
float R,D,area,circle;
printf("please input the R:\n");
scanf("%f",&R);
printf("the D is :\n",2*R);
printf("the area is:\n",pi*R*R);
printf("the circle is:\n",pi*R*2);
}

[ccwwbb]

#include<stdio.h>
main()
{
const float PI=3.14159;
float r;

scanf("%f",&r);
printf("%f,%f,%f",2*r,2*PI,PI*r*r);
}

[xingwenbo]

谢了~

[lingar]

在printf中的逗号后面直接调用三个函数就可以了啊