hi,
i have an unsigned char array...say my_array[3] and i'm trying to shift every content in the array by 2.
for example, i have: my_array[1] = 'aa'
my goal is to shift the 'aa' by 2 to the right so its ' aa'
can anyone give me any suggestions? i thought about using memcopy but i figured using the shift operators (<< and >>) will be much faster since my overall goal is to reduce processing time.
thanks,
bg742
Last edited by barneygumble742; 07-17-2009 at 06:35 PM. Reason: forgot a space
Use a deque, instead of an array. Safer and allows for fast insertions and access. For the example you provided, you'd want to then use the push_front member function.
Originally Posted by brewbuck:
Reimplementing a large system in another language to get a 25% performance boost is nonsense. It would be cheaper to just get a computer which is 25% faster.
hi. how will it work with pointers? for example i have this:
Code:unsigned char *array; array = (unsigned char *)malloc(SIZE); fread(array, 1, SIZE, fin); // reading from file
This is C rather than C++. Which are you actually using?
Originally Posted by Adak
only the file IO part is in C but the rest of the code is C++.
It would be a lot faster if you just read the file with a std::string. You could then insert spaces wherever you want with one of the insert functions.
very true. i thought about that. but for whatever reason, using C style file IO reported slightly faster times than C++.
Can you prove that to me?
