ʵÏֽ׳Ë

#include <stdio.h>
int main()
{
 int jieceng(int n)
{
 if(n==1||n==0)
 {printf("%d",n);
  return n;
}
 else if(n<0)
  printf("error!");
 else 
 printf("%d*",n);
  n=n*jieceng(n-1);
  return n;
 }
int a;
printf("please import a integer:");
scanf("%d",&a);
printf("=%d",jieceng(a));
printf("\n");
return(0);
}