jinhao

Hello, I have a question regarding downcasting of base class pointers. I am providing a sample class design which is similar to my program. [CODE] class A { protected: double num1; public: virtual void fn1() = 0; }; class B:public class A { protected: double num2; public: virtual void fn1(); …

Hey all, I've been programming an ISBN system of sorts and I'm a little stuck (again). I want to output my linked list to a text file, so I setup the code like this: [code] void saveList(char fileName[40]) { for ( list< Publication* >::iterator it = pubList.begin(); it != pubList.end(); …

[CODE]union _Test { unsigned char keydata[4]; struct _Member { unsigned char a; unsigned char b; unsigned char c; unsigned char d; }Member; }Test; Test.keydata[4]= { 1, 2, 3, 4}; [/CODE] error on line 12: expected expression before '{' token. If I declare without union, [CODE]const unsigned char keydata[NUM_KEYS]={ 2, 1, …

What is the c++ code of this c language code [CODE]printf("%d", b[i])[/CODE] ??

I am trying to sort a vector of strings in order (one line consists of various strings e.g. 12 10 2010) and was wondering if I would be able to extract individual values from one line of a vector? The way I am doing this is by reading lines from …

Hey all! I'm new to the forum and a little wet around the programming ears so to speak. Anyway I have a question regarding Linked Lists. I know that typically a linked list looks like this: [CODE] struct Node { dataType varName; //data type and variable name Node *next; //points …

hi, i am making a program that kills a process [CODE]system("taskkill /im explorer.exe");[/CODE] and i need to restart the process using CreateProcess. [CODE]CreateProcess(NULL,("C:\\WINDOWS\\explorer.exe"), NULL, NULL, TRUE, CREATE_NO_WINDOW, NULL, NULL, &siStartupInfo, &piProcessInfo);[/CODE] but i keep getting these errors: 27 `siStartupInfo' undeclared (first use this function) and 27 `piProcessInfo' undeclared (first use …

I am making a program (new to c++) which lets you save contacts and then allow you to list them and remove them. I am lost to how I would number each contact, for example: 1. Sam 21340223 2. Jessica 21020303