Question

C++ program; i need 7.14 as well please.

7.13 (Duplicate Elimination with arrayUse a one-dimensional array to solve the following problem. Read in 20 numbers, each of which is between 10 and 100, inclusive. As each number is read, validate it and store it in the array only if it isn't a duplicate of a number already read. After reading all the values, display only the unique values that the user entered. Provide for the "worst case" in which all 20 numbers are different. Use the smallest possible array to solve this problem. 7.14 (Duplicate Elimination with vector) Reimplement Exercise 7.13 using a vector. Begin with an empty vector and use its push_back function to add each unique value to the vector.

Answer 1

#include<iostream>
using namespace std;

const int size = 20; //constant variable size that we will used as the size of our array as it is mentioned in question that we have to take 20 numbers so size is 20;
void main()
{
   int arr[size]; //declaring our array of size=20

   for (int i = 0; i < size; i++) //this loop will iterate for size =20 times to take input from user
   {
       system("cls"); //this is just for clearing anything written on console
       cout << "Enter No. " << i + 1 << ":" << endl;

       cin >> arr[i]; //taking input from user

       if (arr[i] < 10 || arr[i]>100) //here our first checking is done , if the number>100 or smaller than 10 then it willl be rejected
       {
           cout << "Number Out of Bound!!! Please enter that no again." << endl; //error message
           i = i - 1; //as the wrong no was entered at i th position so we reset i to the previous position in order to get correct no at same position
           system("pause");
       }
       for (int j = 0; j < i; j++) //here our second checking starts, if the no is doplicate ,it would be rejected. Here in this loop , I took j<i. This is very simple.Suppose
                                       //we have entered 10 numbers yet, so i=9 as index starts from 0. So j<i means we have to check only 10 indexes as only those are filled and rest of the array is empty.

       {
           if (arr[i] == arr[j]) // if newly entered no i.e arr[i] matches arr[j] which could be any previously stored number then it will be rejected.
           {
               cout << "Duplicate Detected!!! Please enter that no again." << endl; //error message
                 
               i = i - 1; //as the wrong no was entered at i th position so we reset i to the previous position in order to get correct no at same position
               system("pause");
               break; // as duplicate is found so no need to loop again so we break the loop.
              
           }
       }
   }

   system("cls");

   cout << "Numbers Entered By The User are:" << endl;
   for (int i = 0; i < size; i++) //displaying the array.
   {
       cout << arr[i] << " ";
   }
   system("pause");
}

c\users\haris sheikh\documents visual studio 2013\Projects\dup_array\Debug Enter No. 4: 444 Number Out of Bound!!! Please enter that no again, Press any key to continue ...

c:\users\haris sheikh\documents visual studio 2013\Projects\dup_array\Debug\dup_array.exe Enter No. 4: 11 Duplicate Detected!!! Please enter that no again. Press any key to continue ...

- O X O c:\users\haris sheikh\documents\visual studio 2013\Projects dup_array\Debug\dup_array.exe Numbers Entered By The User are: 11 22 33 44 55 66 77 88 99 100 12 Press any key to continue ... 14 54 32 67 86 83 24 89 90

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