Question

C++ programming language. Write a program that will read in id numbers and place them in an array.The array is dynamically allocated large enough to hold the number of id numbers given by the user. The program will then input an id and call a function to search for that id in the array. It will print whether the id is in the array or not.

Sample Run:

Please input the number of id numbers to be read

4

Please enter an id number

96

Please enter an id number

97

Please enter an id number

98

Please enter an id number

99

Please input an id number to be searched

67

67 is not in the array

Answer 1

If you have any problem with the code feel free to comment.

Program

#include <iostream>

using namespace std;

int main( )
{
    //pointer to int
    int* ar = NULL;
    //getting the length of the array
    int len;
    cout<<"Please input the number of id numbers to be read"<<endl;
    cin>>len;

    //allocating space to the array according to len
    ar = new int[len];
    //taking id inputs
    for(int i=0; i<len; i++){
        cout<<"Please enter an id number"<<endl;
        cin>>ar[i];
    }

    //taking the search variable input
    int serach;
    cout<<"Please input an id number to be searched"<<endl;
    cin>>serach;

    //checking if the id for search is present in the array or not
    bool flag = false;
    for(int i=0; i<len; i++){
        if(serach == ar[i]){
            flag = true;
            break;
        }
    }
    if(flag)
        cout<<serach<<" is in the array"<<endl;
    else
        cout<<serach<<" is not in the array"<<endl;

    //freeing up the allocated space
    delete [] ar;
    ar = NULL;

    return 0;
}

Output