The two previous tips discussed new features that were added to C99, and which C++ doesn’t support. This time I would like to present one of the changes that were made to C99 in order to bring it closer to C++. C++ allows to you declare variables almost anywhere in
classes overload the operators >> for reading from a file and word) // as long as sizeof hasn’t been reached { vs.push_back(word); //copy word to vector }}
One of the classic examples of using recursion is calculating a factorial of a number. Here’s a typical implementation of this function: int factorial (int num){ if (num==1) return 1; return factorial(num-1)*num; // recursive call} factorial() calls itself recursively, subtracting 1 from num on each call, until it equals 1.
In C89 and C++, array dimensions must be declared using integer constant expressions. This allows the compiler to compute the array’s size at compile time. In C99, this rule was relaxed: you can now use any integer expression to declare array dimensions. The size of such an array is known
In earlier stages of C, function declarations looked like this: int func() /*no parameters inside parentheses*/int a,b; /*instead, parameters were declared here*/float f; /*another parameter*/{/*
Question: How can I schedule an automatic reboot? I have the schedule service started and set up to start automatically, and I know how to dothe “at” commands. What I don’t know is the command to get it to reboot. Answer: Look at Shutdown.exe found in both the NT Resource
Question: How do I fix the “a file xxxx.4gl cannot be written to” error, which occurs when I try toprint a document? Answer: Sorry, but I’m not a 4gl person. It looks like you may be getting an error from your printspooler system. I’d guess that your 4gl application prints
Question: Our shop develops apps with VB 5.0 and 6.0. Are either of these versions of VBWindows 2000 compliant/compatible? Answer: Yes, they are. I have done a considerable bit of development on W2K with both VB 5.0and 6.0, and found only a few minor problems. In general—and this applies to
Instead of copying all the files manually you can use the Copy Web Application feature in Visual InterDev 6.0 to easily move your Web application from one server to another. This feature gives you the ability to create new Webs or connect to existing Webs on your destination Web server.