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Differences between a pointer and a reference
1. A reference must always point to some object where as this restriction is not imposed on a pointer.
e.g.
int *pi = 0; // pointer can point to no object.
const int &ri = 0 would be converted as ,
int temp = 0;
const int &ri = temp;
2. The assignment of one references with other changes the object being referenced and not the reference itself.
int ival1 = 1000, ival2 = 2000;
int *pi1 = &ival1, *pi2 = &ival2;
int &ri1 = ival1, &ri2 = ival2;
pi1 = pi2;
ri1 = ri2;
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Write a program to act as an electronic safe. If the correct code has been entered the program should display "Safe Open". If an incorrect code is input it should display "Alarm"
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There are so many different concepts related with OOP (Object-oriented programming) such as: Class Object Inheritance Polymorphism Abstraction Encapsulation
Force(F)= ma
program coding
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