C++ error: new/delete operators must match, how to solve it?

C is a widely used high-level programming language, but various strange error messages often appear, which makes programmers very distressed. Among them, a common problem is that the new/delete operators must match. If you encounter this error, what should you do?

First of all, we need to understand that new and delete are the most important memory allocation and release mechanisms in C. new is used to dynamically allocate a piece of memory, and delete is used to release memory. C also provides new[] and delete[] for allocating and releasing array memory. Of course, the new/delete operators must match when used correspondingly, otherwise various problems will occur.

So, when an error occurs that the new/delete operator must match, how should we solve it? Here are several possible solutions:

1. Check how new and delete are used

First, we need to check in detail how new and delete operators are used in the code . Pay special attention to the use of new and delete operators to ensure that their types and quantities are the same. If you use new[] to allocate array memory, then you must use delete[] to free the memory. If you use the new operator to dynamically allocate memory for a single object, you must use the delete operator to free the memory space.

2. Using smart pointers

C 11 introduces smart pointers, a pointer type that can automatically manage memory. Using smart pointers can effectively avoid the problem of new/delete operators having to match, because smart pointers will automatically manage the allocation and release of memory. When using smart pointers, you only need to pay attention to the life cycle and scope of the object, and do not need to manually call the delete operator to release memory.

3. Using containers

The C standard library provides a rich set of container classes, such as vector, list, set, etc. Using these container classes can effectively avoid the problem of new/delete operators having to match. Container classes automatically manage memory allocation and release, and can easily access and manipulate data.

4. Use RAII technology

RAII technology is a very good way to solve the problem that new/delete operators must match. RAII stands for Resource Acquisition Is Initialization, which uses the destructor of the C object to complete resource release. In RAII technology, you only need to perform resource acquisition in the object's constructor, and perform resource release in the destructor. In this way, resources can be automatically released at the end of the object's life cycle, thus avoiding the problem of forgetting to release resources.

5. With the help of memory analysis tools

Finally, if you encounter a problem in the code that the new/delete operator must match, but cannot determine the specific reason, then you You can use some memory analysis tools to help locate the problem. Memory analysis tools can help you analyze memory allocation and usage, help you find problems in your code and solve them in time.

Summary:

In C programming, the problem that new/delete operators must match is a common mistake. If we pay attention to using smart pointers, containers, RAII technology and other methods for memory management during development, we can effectively avoid this error. Of course, if we encounter this kind of error, we can use debugging tools and memory analysis tools to help us locate and solve the problem.

The above is the detailed content of C++ error: new/delete operators must match, how to solve it?. For more information, please follow other related articles on the PHP Chinese website!