You should open the program use gdb to debug a buggy program. The program should run t like: /bugging test.tsv. Can you give details about where you found the buggy by use gdb?

/** 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, */

bugging.cpp

#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;}

test.tsv

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