写的第一个程序就错误 怎么办
刚开始学习c可是自己练习时写的第一个就总是提示错误，而且是抄的书上的开始12个错误 后来改了只有5个再改还有四个最后1个了，在怎么找都找不到错在哪了，各位大神帮帮忙吧

C/C++ code

#include <stdio.h>#define PI 3.1415main(){double r;double circum;double area;printf("Input r:");scanf("%If",&r);circum = 2 * PI * r;area = PI * r * r;printf("cricumfernce = %f\n",cricum);printf("area = %f\n",area);system ("pause") ;}

[解决办法]
double circum;
printf("cricumfernce = %f\n",cricum);
circum 和 cricum两个不一样的
[解决办法]
[color=#FF0000][/color]#include <stdio.h>
#include <stdlib.h>
#define PI 3.1415
void main()
{
double r;
double circum;
double area;
printf("Input r:");
scanf("%lf",&r);
circum = 2 * PI * r;
area = PI * r * r;
printf("cricumfernce = %f\n",circum);
printf("area = %f\n",area);
system ("pause") ;
}