Problem 29 Write the definition of ptr, a p... [FREE SOLUTION]

Chapter 9: Problem 29

Write the definition of ptr, a pointer to a constant int.

Short Answer

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Answer: To define a pointer to a constant int in C++, you need to use the `const` keyword, followed by the data type (`int`), an asterisk (`*`) to indicate that it's a pointer, and the variable name (e.g., `ptr`). The definition will look like this: ```cpp const int* ptr; ``` In this definition, `ptr` is a pointer to a constant int, which means you can change the memory address `ptr` is pointing to, but you cannot change the value stored at that memory address using this pointer.

Step by step solution

Understanding pointers to constant variables

In C++, when we want to define a pointer to a constant variable, we place the const keyword before the data type. This means that the pointer will point to a memory address that holds a constant value, and we can't change the value stored at that memory address using this pointer.

Writing the definition of a pointer to a constant int

To define a pointer to a constant int, you need to use the const keyword, followed by the data type (int), an asterisk (*) to indicate that it's a pointer, and the variable name (ptr). The definition will be like this: ```cpp const int* ptr; ``` In this definition, `ptr` is a pointer to a constant int. It means that you can change the memory address `ptr` is pointing to, but you cannot change the value stored at that memory address using this pointer.

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91影视

Write the definition of ptr, a pointer to a constant int.

Short Answer

Step by step solution

Understanding pointers to constant variables

Writing the definition of a pointer to a constant int

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