How to Avoid Undefined Reference Error in C++

To avoid undefined errors in our C++ program, we can follow the given steps:

• Double-check function definitions for consistency with declarations.
• Verify that all necessary header files are included.
• Inspect library linking instructions and ensure proper library paths.
• Scrutinize code for typos and misspellings in object names.
• Use a debugger to pinpoint the exact source file and line where the error originates.

To know more about how to fix these kinds of errors, refer to this article – How to fix undefined error in C++?

In C++, an undefined reference is an error that occurs when the linker can’t find the definition of a function or a variable used in the linking stage of the compilation process. This error needs to be resolved for the smooth working of the program.