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C++ Programming Code Examples

C++ > Code Snippets Code Examples

Reassigning a reference

/* Reassigning a reference */ #include <iostream> int main() { using namespace std; int intOne; int &rSomeRef = intOne; intOne = 5; cout << "intOne: " << intOne << endl; cout << "rSomeRef: " << rSomeRef << endl; cout << "&intOne: " << &intOne << endl; cout << "&rSomeRef: " << &rSomeRef << endl; int intTwo = 8; rSomeRef = intTwo; // not what you think! cout << "\nintOne: " << intOne << endl; cout << "intTwo: " << intTwo << endl; cout << "rSomeRef: " << rSomeRef << endl; cout << "&intOne: " << &intOne << endl; cout << "&intTwo: " << &intTwo << endl; cout << "&rSomeRef: " << &rSomeRef << endl; return 0; }

The C++ comments are statements that are not executed by the compiler. The comments in C++ programming can be used to provide explanation of the code, variable, method or class. If we write comments on our code, it will be easier for us to understand the code in the future. Also, it will be easier for your fellow developers to understand the code. By the help of comments, you can hide the program code also. There are two types of comments in C++: • Single Line comment. • Multi Line comment

Consider a situation, when we have two persons with the same name, jhon, in the same class. Whenever we need to differentiate them definitely we would have to use some additional information along with their name, like either the area, if they live in different area or their mother's or father's name, etc. Same situation can arise in your C++ applications. For example, you might be writing some code that has a function called xyz() and there is another library available which is also having same function xyz(). Now the compiler has no way of knowing which version of xyz() function you are referring to within your code.

A return statement ends the processing of the current function and returns control to the caller of the function. A value-returning function should include a return statement, containing an expression. If an expression is not given on a return statement in a function declared with a non-void return type, the compiler issues an error message. If the data type of the expression is different from the function return type, conversion of the return value takes place as if the value of the expression were assigned to an object with the same function return type.

#include is a way of including a standard or user-defined file in the program and is mostly written at the beginning of any C/C++ program. This directive is read by the preprocessor and orders it to insert the content of a user-defined or system header file into the following program. These files are mainly imported from an outside source into the current program. The process of importing such files that might be system-defined or user-defined is known as File Inclusion. This type of preprocessor directive tells the compiler to include a file in the source code program.

A program shall contain a global function named main, which is the designated start of the program in hosted environment. main() function is the entry point of any C++ program. It is the point at which execution of program is started. When a C++ program is executed, the execution control goes directly to the main() function. Every C++ program have a main() function.

To convert decimal number to octal number in C++ programming, you have to ask to the user to enter the decimal number to convert it into octal number to display the equivalent






"Partitioning the array" on the basis of values at high as pivot value. Swapping value at high and at the index obtained. Partitioning array using last element as a pivot. And recursively


Program demonstrates implementation of max-flow_min-cut_theorem. So returns true if there is a 'path from source' 's' to sink 't' in residual graph. Also fills parent[] to store the