51,593 Topics
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 | Can anyone let me know how I could include a variable within a system command? (This is a win32 project and not an application.) I am using: (some code taken out) [ICODE] system(("set path=%path%;"[COLOR="Red"]+user[/COLOR]).c_str()); system(("set CLASSPATH=.;"[COLOR="Red"]+usertwo[/COLOR]).c_str()); system(("java -Djava.security.manager -Djava.security.policy="[COLOR="Red"]+user+[/COLOR]"\examplepolicy Xsys").c_str());[/ICODE] Thanks in advance!!! |
| | I am having a problem writing the last part of my code for this program. There is a DFS function that I need to write that is included in the header file of the graph.h my program. Here is the sample of code that my instructor gave me. [code=c++]template<class VertexType> … |
| | I'm getting an unresolved symbols linking error with this code, the cpp files compile successfully separately, I just can't build the solution and run it. any ideas? header.h [code=c++] #include <iostream> #include <string> using std::string; using namespace std; class Double { private: double dub; char str[50]; public: Double(); Double(char s[50]); … |
 | [code=C++] int MAX_NUM = 600851475143; int max = 0; vector <int> ints; for(int i = 1; i <= MAX_NUM; ++i) if((int)MAX_NUM % i == 0) ints.push_back(i); cout << "size = " << ints.size(); [/code] I get 0. Something is wrong. I get 2 warnings: warning C4305: 'initializing' : truncation from …  |
| | i was given this question by my instructor and i am completely in the dark on what to do. i have been trying to figure out what to do but couldn't find anything in the book that really explained it. any help with this would be greatly appreciated. explain what … |
| | Don't know what is wrong with this, it's giving me an error on the 'if (isalpha(string[i]))' line..I had it working earlier but then decided to put it into a function and it's not working now. It's giving the error "expected primary-expression before '[' token " for that line and the …  |
| | Hello, I'm having trouble with this program. What I have to do is open a file(in this case link.dat) and then the user chooses what they want to do, take something out of it, add somethng to it, print it. It opens the file fine, but then I cant get … |
| | please help me write a function which will return the last element in an unsorted list. the prototype of the function should be ItemType ReturnLastItem(); we should assume that the list is not empty ans it shouldnt change after the program is executed.. pleeeeeeeeease help me |
| | Hey guys i was just wondering i have a code that will allow you to output times 4 different ways but instead of times i want it to output dates 4 different ways. [code=C++] #include <iostream> using std::cout; #include <iomanip> using std::setfill; using std::setw; using std::endl; #include "Time.h" // include … |
 | Hi . I want a program that receive a number and print its subcollections . like this : n=3 : cout : {} , {A} , {B} , {C} , {A,B} , {A,C} , {B,C} , {A,B,C} (with one of the A,B,C , ... characters .) Please help me . … |
| | I am trying to write a program that can be used to display two random numbers to be added together. This program should wait for the answer to be input. If the answer is correct display a statement that says that is correct. If the answer is wrong it needs … |
 | Create a class called Employee that includes three pieces of information as data members – a first name (type string), a last name (type string) and a monthly salary (type int). Your class should have a constructor that initializes the three data members. Provide a set and a get function … |
| | hey guys, I've seemingly exhausted all the possibilities within my limited knowledge, so I'm coming here for some assistance. heres the problem: Read the 20 students info into an array, assign the relevant grade, find the highest score, and print out all the names/scores in addition to the student/s of … |
| | Here's the problem, questions at the bottom. Write a program that uses a structure named MovieData to store the following information about a movie: Title Director Year Released Running time (in minutes) Include a constructor that allows all 4 of these member data values to be specified at the time … |
| | I meets some problem with downcast in c++ programming language. Thus, I needs your help. My program has 5 classes. They are Employee (abstract class),Salary:public Employee,Hourly:public Employee,Commission:public Employee and BasePlusCom:public Commission. In main() function,I used vector<Employee*>employees[4]; Then I assigned values to employees. ........ And I used structural syntax BasePlusCom* ComPtr=dynamic_cast<BasePlusCom*>(employees[i]); … |
| | ok basically what my program is about. I am to create a program that allows users to input aircraft/cargo details, add the cargo to the aircraft(up to 20), and a function to display all the cargo on that aircraft. So the main problem i am getting is with the listing … |
| | Hi. This is for a phonebook assignment. Part of the assignment involves searching a 2D array. This is the function that reads the phonebook file. [code] void getData(char name[][NAMESIZE], char telephone[][PHONESIZE], char zipcode[][ZIPSIZE], char address[][ADDSIZE], int& size); ~~~~~ void getData(char name[][NAMESIZE], char telephone[][PHONESIZE], char zipcode[][ZIPSIZE], char address[][ADDSIZE], int& size){ int … |
 | Hello all, greetings! I'm python guy and I want to access Lame encoder from python. The big problem is I cannot find suitable lame bindings. After loooong googling and metacrawling, I found py-lame. The problem is, when I try to compile it in codeblocks, python.h is missing. I don't know …  |
 | Hello everybody, I'm back, started my 2nd year at Uni now and started programming in the wonder that is C++ and enjoying it tremendously. but I've hit a slight problem, not with code but with design. I'm not sure where to put the input/output, sounds weird but I'll elaborate. i … |
| | Here is the code: [CODE]// All this has to do is take the "names.txt" file, and send it to "backwards.txt" // in reverse order, as an array. No idea why its not working, sent all necessary files with it. #include <iostream> #include <fstream> #include <iomanip> #include <string> #include <ctime> using … |
| | I'm trying to do a program involving a base class and subclasses, whose subclasses use each other. In terms of code: [ICODE] Class Space { ... }; Class Room : public Space { Link* l; ... }; Class Link : public Space { Room* r; ... }; [/ICODE] Now I'm … |
| | Here's the code: [CODE]#include <iostream> #include <fstream> #include <iomanip> #include <string> #include <ctime> using namespace std; string getData(ifstream &fin, string array[]); //string getData(ifstream &fin, string array[]); This is what it SHOULD look like. void outputData(ofstream &fout, string array[], int numNames); //void outputData(ofstream &fout, string array[], int numNames) int main() { … |
| | How do I write a C++ class program to convert temperatures from Celsius to Fahrenheit and vice versa?  |
| | im designing a program where it calls a function that uses the linear search algorithm to locate one of the values. function must keep a count of the comparisons it makes until it finds the value. the program then calls the binary search (a sep. function) to locate the same … |
| | Hello, I know how to create a hash_map and use my hash function with it, but I don't know how to handle collisions. Specifically, how would I implement a chain/buckets with a linked list... it seems like it's built in but I can't find how to do it. [code] #include … |
| | Im making a program with lots of repeating code, so I decided to take all that repeating code and change it into an array. problem is, I've never worked with arrays before. I tried to look up alot of tutorials, and I understand it more now, but not enough to … |
| | How can I declarate a matrix of strings? if I write something like the line below, my code do not compile string a[MAX][MAX]; someone can give me a solution? thanks |
| | Hello everyone, I know there is a build in real time clock inside the computer and I know it's possible to use this clock when you write a program on Assembler(using an interupt that I don't remember at the moment),is there a way to use the real time clock while … |
| | I'm having some problems with a program that invovles arrays. I have a program that is suppose to read data from a file fish.txt about fisherman. The a function is suppose to print the number of fish that need to be thrown back because their is a maximum of 14 … |
| | Hi guys I am working on a Lottery program to generate 6 unique numbers. So far I have the following: CLASS LOOKS LIKE THIS: [code=cplusplus] #include "stdafx.h" #include <string> #include <ctime> #pragma once #define WIN32_LEAN_AND_MEAN // Exclude rarely-used stuff from Windows headers class Lottery // Lottery class definition { public: … |
| | Hi, Recently I came up with an idea of making my own program for tagging mp3 files. I realised I'm lacking in knowledge. For now I need the following information: 1. After typing a path to a main folder, I'd like to read the names of the folders inside. 2. … |
| | Hi everyone, I'm writting old "Battle ship" game. I know, that is very funny, but I want my own version, with one objects and inheretancy levels. Here is a plan what I'm reaching for: ---------------------------- object: A-level: - aship - keeps common parameters of floating things B-level - ship - … |
| | [code] int numOfMonths = numOfYears * 12; float monthlyRepayments; float actualRate = (rate/100)/12; //monthlyRepayments = (borrowAmount*(pow((1+actualRate),numOfMonths))*actualRate)/((pow((1+actualRate),numOfMonths))-1); monthlyRepayments = (100000 * (pow((1+actualRate),180) * actualRate))/((pow((1+actualRate),180))-1); [/code] Ok this is the actual equation: (100000*(1+A1)^180*A1)/((1+A1)^180-1) btw A1 =0.06/12 So the commented line is original one I tried, didn't work. So I tried just putting … |
| | Hi. I made some headers I want to include in every project from the include directories. So I'll be able to do [I]#include <hello.h>[/I] instead of [I]"hello.h"[/I], and I won't need to place them in the same directory every time. So I did this: [IMG]http://i38.tinypic.com/2n1bdj8.jpg[/IMG] [IMG]http://i34.tinypic.com/33a4d1g.jpg[/IMG] but it doesn't work. … |
| | How do I change the icon of the exe. in console mode? (as part of the exe itself) :?: |
| | I got some newbies questions, i hope to hear from you... Feel free to answer any! I will appreciate it so much if you answer them all :-) 1. Do AV's generally (windows security specifically) trust application written under .NET more than the ones written written under MFC & Win32 …  |
| | Hi everyone!! First of all am quite new to cpp especially under linux. I am currently working on a small project under Linux and am having to deal with large number of data(larger than 1 GB). numerous number of operation is to be done with these data. for example: sorting, … |
| | Using Dev-C++ Im a newbie to c++ Is it possible to save files using a variable as the filename. What i want to do is setup a text based program like a mud and be able to go from room to room and have it display room discription and available … |
| | Hi, I need help with implementing cyclic codes.Its much like crc.I've found a lot of software implementations for crc but havent understood them.I've looked at a crc guide which gave, [code] So to implement CRC division, we have to feed the message through a division register. At this point, we … |
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| | [code] #include <iostream> #include <cmath> using namespace std; int main() {//begin main double hypot(double,double); double base; double height; cout<<"Program to compute the Hypotenuse of a given right triangle. \n"<<endl; cout<<"Enter the base: \n"<< endl; cin>>base; cout<<"Enter the height: \n"<<endl; cin>>height; cout <<"The hypothenus of given triangle is " << hypot(base,height) … |
| | need help with this assignment. im having trouble with if and else. I enter package A and then it ask me for the hours twice. just run it if you dont get me. here are a few examples of how running the program should look, please help me!:S example 1 …  |
| | I have writen a program that includes ALOT of code. I update this code and work on it everyday, and with so many lines, I get confussed. a big chunk of my code goes like this: [code] cout << "\nNext:\n"; cin >> string2; if (string2 == "end") { cout<< "ok, … |
| | OK, just a quick question. What is a good sound library I can use to play files? On a slightly unrelated note, what is one I can use to generate sounds (tones, like 8 or 16 bit.)? I would very much prefer it to be open source and platform independent. … |
| | ok so i have been sitting here for over 2 hours trying to figure out what is wrong with my code and why i keep getting the same 2 error messages energy part 2.cpp(104) : error C2059: syntax error : ']' and energy part 2.cpp(105) : error C2447: '{' : … |
 | hello, for one of my programs I need to acquire the decimal off of a number, for example, if a double has value of "123.45" I need an int to have the value "45". to do this, I have the following code [CODE] double value, tempValue; int decimalValue; value = … |
 | How do I make a variable a random value between 1 and 10 each time the program loops? I want to have a "I'm thinking of a number between 1 and 10..." thing, and then you have to guess the number, but I don't want the number to be the … |
| | Hi all, Does anyone know if it is possible to write a C++ macro, which will force the compiler to construct Pascal/custom style string constants during compilation? The basic idea is to avoid unnecessary run-time construction from C-style to custom-style string literals. For example, when evaluating the expression {String2 = … |
| | I'm trying to find a good, easy to use GUI for an inventory in my game, all I really want them to be able to do is select items, maybe move them around into different slots, and be able to modify variables based on where things are moved. I plan … |
| | Hello friends, I am facing a linking problem in VC++8.0 compiler. Suppose I have a library, say A.dll. In this library I have a file, say x.cpp. Within this file there is a extern const variable, like [code] ..... __declspec( dllexport ) extern const long ERROR = 100; ..... [/code] … |
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