Error handling is important for robust programs from "summary" of C Programming Language by Brian W. Kernighan,Dennis Ritchie
Error handling is important for robust programs. When you write a program, you cannot assume that everything will always go smoothly. Errors can occur for a variety of reasons, such as incorrect input from the user, hardware failures, or unexpected events. If your program does not anticipate and handle these errors properly, it may crash or produce incorrect results. To ensure that your program is robust, you need to implement error handling mechanisms. This involves checking for errors at critical points in your code and taking appropriate action when an error occurs. For example, if a function fails to open a file, you should not proceed with the rest of the program as if the file had been successfully opened. One common way to handle errors in C programs is to use return values to indicate the success or failure of a function. For example, a function that opens a file may return a file pointer if the operation is successful, or NULL if it fails. By checking the return value of functions and taking appropriate action, you can prevent errors from propagating throughout your program. Another important aspect of error handling is providing meaningful error messages to the user. When an error occurs, the user should be informed of what went wrong and how to resolve the issue. This can help the user troubleshoot the problem and improve the overall user experience. In addition to checking for errors in your own code, you should also be prepared to handle errors that may arise from external sources, such as system calls or library functions. By understanding the potential sources of errors and implementing appropriate error handling mechanisms, you can make your program more reliable and robust.- Error handling is a crucial aspect of writing robust programs. By anticipating and handling errors effectively, you can ensure that your program behaves as expected in a variety of situations and provides a better user experience.
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