Does char in c mean the same thing as char?

Let's start with the first question:

If you don't write it, you can only read a copy of the value, but you can't modify the original data.

Let's start with these two expressions.

a[0]=1;

int x=a[0];

The first a[0] is used as an lvalue, and after the operation is executed, the effect is that the original data of a[0] is changed.

The second a[0] is used as an rvalue, and the value of a[0] does not change after the operation is executed.

Citation: Review the usage of the citation;

int a=2；

int &b=a；

Question 1 int & b=2;May I? A: No, why? Because the referential variable b wants to store the address of the referenced object, 2 is the immediate operand and does not have a memory address.

This is different from normal variables, such as int x=3;Use x to read the value saved by the variable x, &x is the address where x is read.

Well, with the above basics: let's talk about the return value being a reference type.

t& returns the address of the return value, note that the return value should be a variable and not an immediate number, for the reasons above.

The return value address unit that is read using the function name, so it can be both lvalue and rvalue. See above for a description of the left and right values.

If t is returned as a numeric value, it can only be used as an rvalue, not as an rvalue, that is, the original data of the reference variable cannot be modified. That is, if it cannot be met, it can be used as both lvalue and rvalue.

char* and char& have different meanings.

char ch1,ch2;

char & ca=ch1;

char *cp;

ca=ch2.

cp=ch2 is wrong.

Let's now have an array.

myclass arr;

myclass mem1=arr[0];

t& does not write, what does arr[0] want to return;

Write it as t*, how to give mem, mem is not a pointer.

From the above, T& and T* are different.

Hello, pro, is to define a character type variable, the variable name is ch, you can store a character.

Questions. In C, what variable does the function parameter belong to?

Hello, dear, it belongs to a local variable, and after the function call is over, the form parameter is invalid.

The ch in the C language is a custom variable name. Variable names are used to distinguish different character arrays and artificially named names in a program. When defining and using character arrays, it is common to define variable names as ones that are easy to read and that describe the usefulness of the data they contain, rather than using obscure abbreviations such as a or b2.

The naming convention for variable names is as follows:

1. The variable name can be composed of three types of characters: letters, underscores, and numbers;

2. Variable names can only start with letters or underscores;

3. Variable names cannot be ambiguous;

4. There is a length requirement for the variable name, in the given name! The part that exceeds the specified length will be truncated.

5. Each variable name starts with two or three character abbreviations, which correspond to the type of data that the variable wants to store data in.

Ask what variables the parameters of a function belong to in C.

Hello, this is a variable that defines a char type with the name ch. ch is the name, char a; It is the variable that defines the name a.

is the name of a variable that represents a char variable.

In C, char* represents the character pointer type, which can be represented when it points to the first element of a string.

The C language is widely used in low-level development, and the C language can compile and process low-level core car memory in a simple way. C is an efficient programming language that produces only a small number of machine languages and does not require any runtime environment support.