fatorial de n

# include<stdio.h>
# include<stdlib.h>
float fatorial(int);
int main (void)
{
int n;
float fat;
printf("digite o valor do fatorial:");
scanf("%d", &n);
fat=fatorial(n); /*chama a funçao*/
printf("fatorial de %d e %f\n", n, fat);
system("pause");
return 0;
}
float fatorial(int n)
{
float f=1;
int i;
for(i=1; i<=n; i++)
{
f=f*i;
}
return f;
}