#include"stdio.h"
void main()
{
    integer I;
    long j;
    printf("Enter an integer:\n");
    scanf("%d",&i);
    j=I*I;
    printf("I=%d j=%d\n,j);  
  }
无法运行,怎么改???
-----------------------------------

#include"stdio.h"
void main()
{
   double f;
   printf("Enter an double:\n");
   scanf("%d",f);
   printf("f=%f\n",f);
   }
运行结果出错了???
--------------------------------
#include"stdio.h"
void main()
{
    int i;
    int *pi=i;
    scanf("%d",pi);
    printf("f=%d\n",*pi);

}
运行结果出错了
-------------------------
请大家帮我改一下 ,谢谢啦