Using this starter code, write a c++ program to read from file and count occurrences :

Example Input:

./countDucks animals02.txt 

Animals02.txt duck duck goose duck duck cow duck duck dog 

Example Output:

There were 6 ducks in animals02.txt 

	#include // for printf()
	#include // for exit(), perror()
	#include // for ifstream
	using namespace std;
	int main(int argc, char *argv[])
	{
	if (argc!=2) {
	// if argc is not 2, print an error message and exit
	cerr << "Usage: "<< argv[0] << " inputFile" << endl;
	exit(1); // defined in cstdlib
	}
	return 0;
	}