Want to protect your cyber security and still get fast solutions? Ask a secure question today.Go Premium

x
  • Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 309
  • Last Modified:

Selection of people born in given year

Hi can you advise me?

I should create a program which is called from the command line with one parameter. This parameter will be the number representing a year. The input is a list of records with 3 attributes just in this order:name, surname and birth-year. Output is a sorted list of persons born in year specified by command-line parameter.

requests

- For the purposes of selection and sorting of the list create a function select_people and   its definition place to the   separated module (unit) born.C.
  The funtion must have this prototype vector<string> select_people(multimap<string, int> &people, int year);
  Parameter people is a reference on the indexed container (associated array), which   associates "surname name" of type string with the birth-year (type int) for certain person.
  Parameter year determines the year, according to which will be performed the selection of   corresponding records from array people.
  Function returns a vector (type string), which containes list of persons in alphabetical   order (first surname)
- program will end after the input is read to the end (in Unix shortcut ctrl-D)
- Main module will read the individual records into associated array which will be then given to the function select_people. And then it will write output of this function.

for the insertion of records into the container multimap you can use the member function insert(pair<string, int>(string, int)).

thank you for your help
0
xLeon
Asked:
xLeon
  • 2
1 Solution
 
DanRollinsCommented:
The Experts here will not do your homework and will get suspended if they do.  http:/help/guidelines.jsp#22

You need to get started on the progject and do as much as you can, then you can ask specific questions when you run into a problem.

-- Dan
0
 
xLeonAuthor Commented:
I understand I should work it out myself, so
I was trying to run into the problem and I wrote this program with subtle differences which are easy to modify, but my program doesn't write out the desirable output and I can't figure out why. I'm not conversant with stl yet.

#include <string>
#include <map>
#include <vector>
#include <stdlib.h>

using namespace std;
vector<string> select_people(multimap<string, int> &people, int rok);


int main(int argc, char *argv[])
{
  string name;
  string surname;
  int b_year;
  long given_year;

  multimap<string, int> apole;
  vector<string> v;

  cout<<"Write a name, surname and born-year\n";
  for (int i=0;i<=3;i++){
    cin>>name>>surname>>b_year;
    apole.insert(pair<string, int>(surname+" "+name,b_year));
  }
  given_year = strtol(argv[1]);
  v = select_people(apole, (int) given_year);
  for (int i=0; i<v.size(); i++)
   cout<<v[i]<<endl;
  return 0;
}

vector<string> select_people(multimap<string, int> &people, int year)
{
  vector<string> V;
  typedef multimap<string, int>::iterator multit;

  for (multit it = people.begin(); it != people.end(); ++it)
    if ((it->second) == year)
      V.push_back(it->first);
  return V;
}

0
 
DanRollinsCommented:
In my library, the strtol function requires two more parmaters.  All you wan to do is convert a sting from the command line into an integer, so I suggest using

  long given_year= atoi( argv[1] );

Other than that, it works exactly right, as far as I can tell.  Here is the output of a trial run:

Write a name, surname and born-year
john smith 2000
bill jones 1000
tom thumb 2000
dan rollins 3000
smith john
thumb tom

The "given_year" was 2000, and the last two lines show the name of the two people who were associated with that year.

What do you need help with?

-- Dan
0

Featured Post

Concerto's Cloud Advisory Services

Want to avoid the missteps to gaining all the benefits of the cloud? Learn more about the different assessment options from our Cloud Advisory team.

  • 2
Tackle projects and never again get stuck behind a technical roadblock.
Join Now