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Pointers are just numbers, representing addresses in memory. You can add to and subtract from pointers, for instance. It is pretty easy to make mistakes with pointer math, however, and some times those sorts of bugs can be hard to catch, so be careful. Don't dereference pointers unless you know that the address is valid, and that you know what data type is at that memory address. With arrays, generally be careful. C/C++ does not check array bounds, and the problems with pointer math can occur with arrays as well, since arrays are just "syntactic sugar" barely covering up the underlying pointers.
A virtual function permits derived classes to replace the implementation given by the base class. The compiler makes sure the replacement is always known as whenever the object in
#include #include #include #include #include class Employee { private: char *Name; //Set them as pointers... int IdNumber; char *Department; char *Position; public: voi
Precedence and Order of evaluation The languages follow a standard precedence for basic operators. Precedence rules help in deleting ambiguity of the order of operations perfor
Addition of array elements: #define rows 3 #define cols 3 void main() { int i=0,j=0,sum=0; int arr[rows][cols];
Which one would you prefer - a macro or a function? Actually it depends on the purpose of program! - In case of macros, corresponding code is inserted directly into your sou
Conversion between Objects of Different Classes As the compiler does not know anything about the user-defined type, the conversion instructions are to be specified in a functio
Create a user-defined data structure (struct) called Node that represents a node within a linked list where the "data" stored in each node is a pointer to a Car object. a) Wr
A: In C++, the definition of NULL is 0, thus there is only an aesthetic difference. I prefer to ignore macros, so I employ 0. Another difficulty with NULL is that people sometimes
Write a C++ program that reads from keyboard 3 integers, with proper input prompt, and then displays the maximum sum of any pair of numbers from these three. If the 3 numbers are 5
Call by Reference Passing variables(parameters) to a function in C can be done in two ways - pass by value, also called as call by value and pass by address or also known as ca
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