#include <stdio.h>
#define max 32767
main()
{
        int n;
        int sum=0;
        int a[max+1];
        int i,j,k,x;
        while(1)
        {
          printf("输入要求阶乘的数:");
                scanf("%d", &n);
                k=0;
                a[k]=1;
                for(i=2;i<=n;i++)
                {
                        x=0;
                        for(j=0;j<=k;j++)
                        {
                                x=a[j]*i+x;
                                a[j]=x%10;
                                x=x/10;
                        }
                        while(x>0)
                        {
                                k++;
                                a[k]=x%10;
                                x=x/10;
                        }
                }
               
                for(i=k;i>=0;i--)
                {
                        printf("%d", a[i]);
                }
                printf("\n");
        }
        return 0;
}

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