C++ Vector at/[] operator speed

Question

In order to give functions the option to modify the vector I can\'t do

curr = myvec.at( i );
doThis( curr );
doThat( curr );
doStuffWith( curr );
         


        

Answer 1

The reason the first doesn't work is that you're not setting a pointer or iterator to the address of the ith variable. Instead you're setting curr equal to the value of the ith variable and then modifying curr. I'm assuming that doThis and doThat are references.

Do this:

MyObject& curr = myvec.at( i );