Is it logical to give root execution to some commands executed by a normal user?

Given a C/C++ program that uses some system calls or commands, say for example sockets. In this question the solution gives root access to a normal user to run a specific one executable, which means the normal user will run all the commands given in that executable. The question is, is it logical at least to give a normal user access to execute specific parts of the executable ? i.e. To execute some commands within the executable as root ? if so, How ? Thanks! :)