In fact, this can only be counted as the factorial of 12, because the factorial of 13 is equal to 6227020800, which is greater than the quadratic power of 3 1, that is, it exceeds the maximum value (overflow) that can be expressed by int, so you can change int to double.

# include & ltstdio.h & gt

# include & ltstdlib.h & gt

Double f (integer n)

{

If (n = ||| n = =1) returns1;

Returns n * f (n-1);

}

int main()

{

int n，k，I；

Printf ("Please enter a number:");

scanf("%d "，& ampk)；

for(I = 1； I<= k；; i++)

{printf ("The number %d is:", i);

scanf("%d "，& ampn)；

printf("%d！ =%f\n "，n，f(n))；

}

}

I changed your writing a little. Take a look.