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The editor of this article introduces "the citation method in C++" in detail, the content is detailed, the steps are clear, and the details are handled properly. I hope this "citation method in C++" article can help you solve your doubts. Let's go deeper and deeper with the editor's train of thought. Let's learn new knowledge.

Background

In cUniverse +, accessing a variable can only be accessed, passed, or queried in two ways. The two ways are:

1. Access / pass variables by value

two。 Access / pass variables by address-this method is the pointer

There is no third way to access and pass variable values. A reference variable is a pointer variable, which also has memory space. The most important thing is that a reference is a pointer that will be dereferenced automatically by the compiler. Is it hard to believe?

Here is a simple C++ code that uses a reference

# include int main () {inti = 10; / / A simple integer variable int & j = I; / / A Reference to the variable i jamboree; / / Incrementing j will increment both i and j. / / check by printing values of i and j cout

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