C :: Function For Raising Numbers To Positive Integers

Write a function that raises an integer to a positive integer power. Call the function x_to_the_n taking two integer arguments x and n. Have the function return a long int, which represents the results of calculating x^n.Here's my code:

Code:

#include <stdio.h>
long int x_to_the_n(int x, int n)
{
int i;
long int acc = 1;

for(i = 1; i <= n; ++i)
acc *= x;
}

[code]...

It compiles OK, but when I run it the program stops after entering the number (x) and power (n).