C/C++ has function library that contains object code (codes that has been compiled) for predefined functions. These codes are ready to be used and can be called in the main program such as printf() function. They perform frequently needed tasks. Executable program can be run or executed. Before the executable program is created, a program called linker (to link other object and library files needed by the main program) performs a process called linking.
Debug, debug and debug, finding program bugs, this is in debug mode.
Alfa version - May still contains bugs, pre-release version.
Beta / RC, Release Candidate version - May still contains bugs, pre-release version.
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