Function: write function fun to find s=1^k+2^k +3^k ++ The value of n^k, (the cumulative sum of the K power of 1 to the K power of n).

subject ：

  Code details ：

#define K 4
#define N 5
#include <stdio.h>

long  fun(int n, int k)
{
	/**********Program**********/
	long sum = 1,i,j,t;
	for (i = 2; i <= n; i++)
	{
		t = 1;
		for (j = 1; j <= k; j++)
		{
			t *= i;
		}
		sum += t;
	}
	return sum;
	/**********  End  **********/
}
int	main()
	{
		long int sum;
		printf("Sum of %d powers of integers from 1 to %d = ", K, N);
		sum = fun(N, K);
		printf("%ld\n", sum);
	}