When I learned c++, it was sold as a better/safer version of C. You had function prototypes, const, inline functions, improved compiler warnings, etc. Some of those improvements made it into later versions of the C standard. I hope C89+ is more popular than K&R C for new code. You could slowly ease into and benefit from day one without ever using a class.
Objective C is strictly the classes and runtime so there's no benefit unless you jump right in.
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A couple thoughts on C++ vs Objective C...
When I learned c++, it was sold as a better/safer version of C. You had function prototypes, const, inline functions, improved compiler warnings, etc. Some of those improvements made it into later versions of the C standard. I hope C89+ is more popular than K&R C for new code. You could slowly ease into and benefit from day one without ever using a class.
Objective C is strictly the classes and runtime so there's no benefit unless you jump right in.