C语言求圆的面积#includemain(){int r,s;printf("please input value r\n");scanf("%f",&r);s=3.14*r*r;printf("圆的面积%f\n",s);}请问我写的程序哪里错了?

C语言求圆的面积#includemain(){int r,s;printf("please input value r\n");scanf("%f",&r);s=3.14*r*r;printf("圆的面积%f\n",s);}请问我写的程序哪里错了?
C语言求圆的面积
#include
main()
{
int r,s;
printf("please input value r\n");
scanf("%f",&r);
s=3.14*r*r;
printf("圆的面积%f\n",s);
}
请问我写的程序哪里错了?

C语言求圆的面积#includemain(){int r,s;printf("please input value r\n");scanf("%f",&r);s=3.14*r*r;printf("圆的面积%f\n",s);}请问我写的程序哪里错了?
%f是float类型数据,int r,s;你的定义有误必须float r,s；