Author: Matt Taylor
Date: 07:48:19 02/28/03
Go up one level in this thread
On February 27, 2003 at 09:55:35, Tom Likens wrote: >On February 26, 2003 at 17:07:45, Bo Persson wrote: > >[--snip--] > > >>>I see that I did not include data.h in data.c but it caused me no problem >>>with c files >> >>You have found an actual difference between the languages! >> >>In C++, const variables are considered local unless declared otherwise. In C, >>all global (file level) variables are extern by default. >> >>Bo Persson >>bop2@telia.com > > >No, no- C++ is just a superset of C. There is *absolutely* >no differences between them :-) :-) :-) :-) :-) ;-) > >regards, >--tom Actually there are many subtle differences. Here's an example: C: int *array; array = malloc(size); C++: int *array; array = malloc(size); // error array = (int *) malloc(size); array = new int[size]; // preferred Also, I have a fair amount of code that looks like this: char *byteptr; // some stuff if (blah) x = *((int *) byteptr)++; else x = (int) *byteptr++; This does not work in C++. This example actually came from an x86 disassembler I wrote where it was extremely convenient to break type rules again & again. The only solution I have found in C++ is to use a union with pointers of varying type. You are right that most of C and C++ is the same, but some acceptable C programs will not compile as C++ for various reasons. -Matt
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.