1. Write C++ statements to do the following: a) Declare string pointer variables

Question

1. Write C++ statements to do the following: a) Declare string pointer variables named strPtr1 and strPtr2. b) Allocate an anonymous string variable, and make strPtr1 point to it. c Input a string value from the keyboard and store it in the anonymous variable of part (b). d) Display the length of the anonymous string variable of part (b). e Cause strPtr2 to point to the anonymous variable of part (b). f Declare a double pointer variable named doublePt:r g) Allow the user to enter n, the number of values to be processed; then allocate an anonymous array of n double values, and make doublePtr point to it. h) Fill the anonymous array of part (g) with n input values, entered from the keyboard. i) Deallocate the storage of the anonymous variable of part (b) j) Deallocate the anonymous array of part (g).

Explanation / Answer

a) string *strPtr1, *strPtr2;

b) string *str = new string();
strPtr1 = str;

c) cin >> *str;

d) cout << (*str).length();

e) strPtr2 = str;

f) double *doublePtr;

g) int n;
cin >> n;
double *arr = new double[n];
doublePtr = arr;

h) for (int i = 0; i < n; i++) {
cin >> arr[i];
}

i) delete str;

j) delete [] arr;

Here is full code:

#include <iostream>

using namespace std;

int main()
{
string *strPtr1, *strPtr2;
string *str = new string();
strPtr1 = str;
cin >> *str;
cout << (*str).length();
strPtr2 = str;
  
double *doublePtr;
  
int n;
cin >> n;
double *arr = new double[n];
doublePtr = arr;
for (int i = 0; i < n; i++) {
cin >> arr[i];
}
  
delete str;
delete [] arr;

return 0;
}

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