计算N！
#include <stdio.h>
int main ()
{
int i,n,cj=1;
printf("input n:");
while(scanf("%d",&n)!=EOF)
{
for (i=1;i<=n;i++)
{
cj*=i;
printf ("i=%d,cj=%d\n",i,cj);
}
printf("input n:");
}
printf("%d",cj);
return 0;
}
int main ()
{
int i,n,cj=1;
printf("input n:");
while(scanf("%d",&n)!=EOF)
{
for (i=1;i<=n;i++)
{
cj*=i;
printf ("i=%d,cj=%d\n",i,cj);
}
printf("input n:");
}
printf("%d",cj);
return 0;
}