Question

C++ language

I need to update this code with the following:

ask the user for how many structures they would like. Once you get the number, allocate an array
of pointers. Once they have been created, proceed to loop through and get the data as usual, and display
it back to the screen.

struct record
{
   int age;
   string name;
};

int check(record r[], int n, string nm)
{
   for (int i = 0; i < n; i++)
   {
       if (r[i].name == nm)
           return 0;
   }
   return 1;
}

int main()
{
   std::cout << "Program 3-4:Repeating Names Check: " << endl;
   std::cout << "________________________________________________\n" << endl;

   cout << "How many records would you like?: ";
   int n;
   while (!(cin >> n))
   {
       cin.clear();
       while (cin.get() != '\n') continue;
       std::cout << "Invald entry, please try again: ";
   }
   record *rec = new record[n];
   for (int i = 0; i < n; i++)
   {
       cin.ignore();
       cout << "What is the name for record " << (i + 1) << "?: ";
       string nm;
       getline(cin, nm);
       while (check(rec, i, nm) == 0)
       {
           cout << "THERE CAN BE ONLY ONE. What is the name for record " << (i + 1) << "?: ";
           getline(cin, nm);
       }
       rec[i].name = nm;
       int ag;
       cout << "What is the age for record " << (i + 1) << "?: ";
       while (!(cin >> ag))
       {
           cin.clear();
           while (cin.get() != '\n') continue;
           std::cout << "Invald entry, please try again: ";
       }
       rec[i].age = ag;
   }
   cout << "The data is: " << endl;
   for (int i = 0; i < n; i++)
   {
       cout << (i + 1) << " Name: " << rec[i].name << ", Age: " << rec[i].age << endl;
   }
}

Answer 1

If you have any doubts, please give me comment...

If you want to declare memory as dynamically with malloc, replace with following statments:

#include <iostream>

#include <cstdlib>

#include <string>

using namespace std;

struct record

{

int age;

string name;

};

int check(record r[], int n, string nm)

{

for (int i = 0; i < n; i++)

{

if (r[i].name == nm)

return 0;

}

return 1;

}

int main()

{

std::cout << "Program 3-4:Repeating Names Check: " << endl;

std::cout << "________________________________________________ "

<< endl;

cout << "How many records would you like?: ";

int n;

while (!(cin >> n))

{

cin.clear();

while (cin.get() != ' ')

continue;

std::cout << "Invald entry, please try again: ";

}

// record *rec = new record[n];

record *rec = (record *)malloc(sizeof(record)*n);

for (int i = 0; i < n; i++)

{

cin.ignore();

cout << "What is the name for record " << (i + 1) << "?: ";

string nm;

getline(cin, nm);

while (check(rec, i, nm) == 0)

{

cout << "THERE CAN BE ONLY ONE. What is the name for record " << (i + 1) << "?: ";

getline(cin, nm);

}

rec[i].name = nm;

int ag;

cout << "What is the age for record " << (i + 1) << "?: ";

while (!(cin >> ag))

{

cin.clear();

while (cin.get() != ' ')

continue;

std::cout << "Invald entry, please try again: ";

}

rec[i].age = ag;

}

cout << "The data is: " << endl;

for (int i = 0; i < n; i++)

{

cout << (i + 1) << " Name: " << rec[i].name << ", Age: " << rec[i].age << endl;

}

}