Identify an error in the following code segment. class Pair {

C++ Programming: From Problem Analysis to Program Design
8th Edition
ISBN:9781337102087
Author:D. S. Malik
Publisher:D. S. Malik
Chapter12: Points, Classes, Virtual Functions And Abstract Classes
Section: Chapter Questions
Problem 38SA
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Identify an error in the following code segment.

class Pair {
private:
  float a, b;
};
float sum(Pair o) {
  return o.a + o.b;

Group of answer choices
o.a + o.b should be replaced with o->a + o->b
 
function sum should end with a semicolon
 
function sum cannot access private members of Pair
 
sum is not defined within class Pair so it cannot use Pair as a function parameter
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