Why does the C language not check array subscript for out-of-bounds?

1. In order to improve the running efficiency, do not check if the array table is out of bounds,ProgramYou can run fast. Because C language is not a fast development language, it requires developers to ensure that all logic is correct. Therefore, at least till now, C language is the fastest and most efficient among all advanced languages. The C language is used for almost all scenarios with demanding performance requirements.

2. The subscript is not checked for greater space and convenience for pointer operations. If this check is available, the pointer function will be greatly weakened. The array identifier of C does not contain information about the length of the array, but only the address information. Therefore, the language itself cannot be checked, it can only be checked by the compiler, and the early C language compiler does not check the array out of bounds. It can only be checked by the programmer. In addition, in early CRT functions, cross-border checks on string pointers or arrays were not performed. programmers were required to ensure sufficient space, therefore, it was only after vs2005 that Microsoft provided a secure CRT function version.