This is a simple code with logic errors. I was wondering if someone can fix the code. Show proof it compiles correctly!

/*
	* This program should compute the average and maximum age of all of the
	* people in a TSV data file whose lines each look like this:
	*
	* LAST_NAME FIRST_NAME ID AGE
	*
	* Once compiled, you can run this program like so:
	* ./debugging-3 data.tsv
	*/
	#include
	#include
	#include
	struct person {
	std::string last_name;
	std::string first_name;
	int id;
	int age;
	};
	/*
	* This function counts and returns the number of entries in a TSV file. The
	* number of entries is counted as the number of non-empty lines.
	*
	* Hint: there shouldn't be any bugs in this function.
	*/
	int count_tsv_file_entries(std::ifstream& infile) {
	std::string line;
	int count = 0;
	// Make sure the file cursor is at the beginning and then count the lines.
	infile.seekg(0);
	do {
	getline(infile, line);
	if (line.length() > 0) {
	count++;
	}
	} while (!infile.eof());
	// Make sure the file's ready to read with the cursor at the beginning.
	infile.clear();
	infile.seekg(0);
	return count;
	}
	/*
	* This function reads people from a specified data file (with TSV format as
	* described in the file header) into an array of person structs and returns
	* the number of people read.
	*/
	int read_people(char* filename, struct person*& people) {
	std::ifstream infile(filename);
	int i = 0, n = count_tsv_file_entries(infile);
	struct person new_person;
	people = new struct person[n];
	do {
	infile >> new_person.last_name >> new_person.first_name >> new_person.id
	>> new_person.age;
	people[i++] = new_person;
	} while (!infile.eof());
	return n;
	}
	/*
	* This function computes and returns the average age of all of the people in
	* an array of person structs.
	*/
	float compute_avg_age(struct person* people, int n) {
	float avg = 0;
	for (int i = 0; i < n; i++) {
	avg += people[i].age / n;
	}
	return avg;
	}
	/*
	* This function computes and returns the maximum age of all of the people in
	* an array of person structs.
	*/
	int compute_max_age(struct person* people, int n) {
	int max = 0;
	for (int i = 0; i < n; i++) {
	if (max < people[i].age) {
	max = people[i].age;
	}
	}
	return max;
	}
	int main(int argc, char** argv) {
	if (argc < 2) {
	std::cerr << "Error: must specify a data file."
	<< std::endl << std::endl;
	std::cerr << "usage: " << argv[0] << " " << std::endl;
	return 1;
	}
	struct person* people;
	int n = read_people(argv[1], people);
	float avg_age = compute_avg_age(people, n);
	int max_age = compute_max_age(people, n);
	std::cout << "The average age of the " << n << " people is: " << avg_age
	<< std::endl;
	std::cout << "The maximum age of the " << n << " people is: " << max_age
	<< std::endl;
	}

Here's the data file to be put in:

Skywalker	Luke	10000123	24
	Organa	Leia	10000121	24
	Solo	Han	10000117	29
	?	Rey	10000030	21
	Dameron	Poe	10000204	27
	Vader	Darth	100001A7	58
	Ren	Kylo	100002EB	26
	FN-2187	Finn	10000101	23