How to determine the level of logging result accuracy in your program?

The level of logging accuracy in a program can be determined by several criteria:

• Log level selection: Common levels are DEBUG, INFO, WARNING, ERROR, CRITICAL. The lower the level, the more detailed and less critical messages are logged.

• Format and content of messages: Accurate and informative messages help better understand the program's state.

• Time and context: Logs should contain timestamps and context (e.g., thread identifiers, functions) to facilitate analysis.

• Configurability: The ability to change the log level without modifying the code increases flexibility.

An example of configuring logging in C++ using spdlog:

#include <spdlog/spdlog.h>

int main() {
    spdlog::set_level(spdlog::level::info); // Set level to INFO
    spdlog::debug("This is a debug message"); // Will not be displayed
    spdlog::info("Informational message"); // Will be displayed
    spdlog::error("Error message"); // Will be displayed
    return 0;
}

Thus, logging accuracy is determined by the correct choice of level and message content, which allows effective monitoring of the program's operation.