C++ Output

#include <iostream> 
  int main(int argc, const char * argv[]) 
  { 
  	int ss(int x[], int); 
  		int a[3] = { 3, 5, 7 }; 
  		int b[4] = { 2, 4, 5, 2 }; 
  		std::cout << "a=" << ss(a, 3) << std::endl; 
  		std::cout << "a=" << ss(b, 4) << std::endl; 
  		return 0; 
  } 
   
  int ss(int x[], int n) 
  { 
  	int i, s = 0; 
  	for (i = 0; i <= n - 1; i++) 
  		s = s + i*x[i]; 
  	return s; 
  }