Question

// This is chapter 9 Pointers and Dynamic array #include< iostream> #include<string> using namespace std; //Gv //function declaration string* add_name(string*,int&); void display_names (string*,int); //main int main() //local var int size-3; string *students_names-new string[size]; //code cout<<"Enter "<<size< students names:"<<endl; for(int i-0; i<size;i++) cin>>students_names[i]; students names-add name(students nam es, size); display_names (students_names, size); delete[] students_names; system("pause") return ;

using the code above my instructor just want me to delete name from a list of students name. the function needs to be called delete_name. It's in c++. please no changing the code above just adding. this is pointer and dynamic array.

Answer 1

#include <iostream>
#include <string>
using namespace std;
void display_names(string* s_names, int size)
{

for(int i=0;i<size;i++)
cout << "Name " << i << ": " << s_names[i] << endl;
}
string* delete_name(string* s_names, int& size)
{
string name;

cout << "Enter the name of student to delete from the list: ";
cin >> name;//take the name to be deleted as input

int i=0;
for(i = 0;i<size;i++)
{
if(s_names[i] == name)//loop through the array to find the index of name in the array
break;
}
if(i==size)//if end of array reached, it means name not present in the list
{
cout << "Name not present in the list.\n";
return s_names;
}
string* temp = new string[size-1];//declare an array of size 1 less than the initial array
for(int j = 0; j<i; j++)
{
temp[j] = s_names[j];//copy the names till before of ith name.
}
for(int j = i+1; j<size; j++)
{
temp[j-1] = s_names[j];//copy the name after ith name.
}
delete[] s_names;//delete initial array
size--;//decrease size by 1
return temp;//return new array
}

int main()
{
int size = 3;
string* students_names = new string[size];
cout << "Enter " << size << " students names." <<endl;
for(int i=0;i<size;i++)
cin >> students_names[i];

students_names = delete_name(students_names, size);//deletes the name from array
display_names(students_names, size);//display names after deletion.
}

Refer to image below for better understanding:

÷include #include using namespace std; void display names (string* s names, int size) <iostream> <string> 3 4 for (int is0;i<size;i++) cout << "Name " << ǐ << ": " << s names [1] << endl; 10 string* delete_name (string* s_names, int& size) 12 13 14 15 16 17 string name; cout << "Enter the name of student to delete from the list: "; cin >> name;//take the name to be deleted as input int i-; for(i -0;i<size;i++) 20 if (s_names [i] break name) //loop through the array to find the index of name in the array 23 if (i-size)//if end of array reached, it means name not present in the list 25 26 cout << "Name not present in the list.In" return s names 29 30 string* temp = new string [size-11://declare an array of size 1 less than the initial array for (int j = 0; j<i; ]++)

#include include <iostream> <string> I 3 using namespace std; 4 void display_names (string* s_names, int size) cout << "Name" << endl for (int i-;i<size;i++) cout << s names [i] << endl 10 string* delete_name (string* s_names, int& size) 12 13 14 15 16 17 string name cout << "Enter the name of student to delete from the list:" cǐn >> name; //take the name to be deleted as input int i o; for(i - 0;i<size;i++) 19 20 21 if (s_namesti]- name) .//loop through the array to find the index of name in the array break 23 if (i=-size) //if end of array reached, it means name not present in the list 25 26 27 28 29 30 cout << "Name not present in the list.In" return s names; string* temp new string[size-11://declare an array of size 1 less than the initial array for (int j-0 j<i; j++)

26 27 cout << "Name not present in the list.\n" return s names 29 30 31 32 string* temp = new string [size-11://declare an array of size 1 less than the initial array for (int j = 0; J<1 ; j++) temp[j]s_names [j]://copy the names till before of ith name. for (int j-i+1: j<size j++) 34 35 36 37 38 39 40 41リ 42 43 int main() 44 E 45 46 47 48 49 50 51 52 53 temp[J-1] -snames [j];//copy the name after İth name - delete[] s names;//delete initial array size--;//decrease size by 1 return temp://return new array int size = 3; string* students_names - new string[sizel; cout << "Enter"<< size <<" students names." <<endl for (int 1-0;1<size ;i++) cin >> students names [i]; students names = delete name(students names, size) ://deletes the name from array display names (students names, size);//display names after deletion.

Sample Output:

Enter 3 students names. John David Mike Enter the name of student to delete from the list: David Name e: John Name 1: Mike Process returned (x execution time 7.498 s Press any key to continue.

You can use the delete_name function written above in your program along with the other functions. I have provided the implementation and test case for the delete_name function. Please give this solution a thumbs up if you find it helpful and comment if you have any doubts in it.