C++ compilation error: array out of bounds, how to solve it?

C is an efficient and powerful programming language that is widely used in software development, system programming, game programming and other fields. However, in C programming, we often encounter some difficulties and errors, such as array out-of-bounds errors. This article will introduce the causes and solutions of array out-of-bounds errors.

1. Causes of array out-of-bounds errors

In C programming, array out-of-bounds errors are a common error. The main reason is that when the program accesses the array, it exceeds the range of the array, causing the program to experience an exception or crash.

For example, in the following code segment, the length of the array arr is 5, but the program performs an assignment operation at the 6th position:

int arr[5];
arr[6] = 100;     //数组越界错误

Because the subscript of the array starts from 0, So arr[6] is out of bounds, and the program will generate an error message and exit.

2. Solutions to array out-of-bounds errors

To avoid array out-of-bounds errors, programmers need to follow some basic rules:

1. Clear the length of the array

When defining an array, you need to clearly know the length of the array. The length of the array must be large enough to accommodate all the data that needs to be stored. If the program needs to store data that exceeds the length of the array, the length of the array needs to be redefined.

2. Pay attention to the range of array subscripts

When using arrays, you need to pay attention to the range of array subscripts. Array subscripts in C start from 0, so if you define an array with a length of 5, its subscript range is 0~4. If the program attempts to access a value elsewhere in the array, an array out-of-bounds error occurs.

3. Use loops to access arrays

Using loops to access arrays in programs can effectively avoid array out-of-bounds errors. Loops can dynamically control the range of array subscripts to prevent the program from going out of bounds.

4. Use container classes such as vector instead of arrays

In C, container classes such as vector, list, etc. can effectively replace arrays to avoid array out-of-bounds errors. These container classes have the characteristics of dynamic growth, and there will be no array out-of-bounds problem when storing data. Therefore, programmers can use container classes instead of arrays to ensure program stability and maintainability.

3. Summary

In C programming, array out-of-bounds errors are a common error. Programmers need to clarify the length of the array, pay attention to the array subscript range when using the array, use loops to access the array, or use container classes instead of arrays, develop good programming habits when programming, and avoid array out-of-bounds errors.

The above is the detailed content of C++ compilation error: array out of bounds, how to solve it?. For more information, please follow other related articles on the PHP Chinese website!