#include
long fac(unsigned n)
{
if (n == 0 || n == 1)
{
return 1;
}
else
{
return (n * fac(n - 1));
}
}
int main()
{
unsigned ui;
printf("输入计算的阶乘：");
scanf("%u", &ui);
printf("%u的阶乘为:%u\n", ui, fac(ui));
return 0;
}
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