51,593 Topics
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| | how can i check if my text file is empty??? i have tried something using eof but it doesnt seem to work or am just using it wrongly [code] if(infile.eof())//check if it is empty /*also tried this*/ if(infile.eof()==0) [/code]  |
| | This is what I have, but I need to make a for loop instead of the initialize steep. PLEASE HELP [code] int main () { int numb[10];//1,2,4,8,16,32,64,128,256,512 int numb2[10]; int counter, counter2; /* numb[0]=1,numb[1]=2,numb[2]=4,numb[3]=8,numb[4]=16,numb[5]=32; numb[6]=64,numb[7]=128,numb[8]=256,numb[9]=512; numb2[0]=0,numb2[1]=1,numb2[2]=5,numb2[3]=3,numb2[4]=10,numb2[5]=5; numb2[6]=15,numb2[7]=7,numb2[8]=20,numb2[9]=9; */ for (int z=0; z<10; z++) cout<<numb[z]<<" "; cout<<endl<<endl; for (int x=0; x<10; … |
| | [code=cplusplus] //I got almos this program done, it gets the apropiate result skipping some steps. //How do i pass the "int diff" to the "printText function". diff is the largest elemt or the //more repetitive letter from a text file, where the alphabet was shifted by 12. //Also, The largest …  |
 | I want to recursively check if two strings are equal, not in size, but character by character. I am unallowed to use loops and the == operator. I tried to use two parallel arrays, but when testing my function I got undesired results. Here's what I came up with: [CODE]int … |
| | Hey I know this is really simple, I'm studying my first course of C++. In my prac for the week it asks: "A TrainCar is a base class representing carriages for a train. It defines no attributes but has a public function called shape which accepts no arguments and returns … |
| | Hi, I created a checklistbox and binded the display value from a MS-Access table. Next, I am trying get the checked item but I keep getting "System.Data.DataRowView" Here is what I did: [CODE] private: System::Void Form1_Load(System::Object^ sender, System::EventArgs^ e) { this->oleDbDataAdapter1->SelectCommand->CommandText="SELECT DISTINCT Profile_Name FROM Profiles"; this->oleDbDataAdapter1->Fill(dataSet1,"Profiles"); DataTable^dt= dataSet1->Tables["Profiles"]; checkedListBox1->DataSource= dt; … |
| | Here is my problem, if you run the program(using piping), it should output the followings: [ICODE]========================= PHANTOM COMPANY INVOICE PRODUCT ID QUANTITY PRICE ($) COST ($) P010001 2 24.99 49.98 DVD-player5 1 58.95 58.95 P010002 20 8.85 177.00 ... TOTAL COST = $xxxxx.xx[/ICODE] my invoice is not the same as … |
| | How to close dialog box if it doesnt hav OK and CANCEL Button in windows programming.the dialog box is shown with DoModal which inturn calls onInitDialog().But how to close it ?does EndDialog hepls and how ?where to call EndDialog? |
| | Hi, I get some problems when I run the following codes. #include<iostream.h> class Distance { protected: int feet; float inches; public: Distance() { feet = 0; inches = 0; } Distance(int ft, float in) { feet = ft; inches = in; } void get_dist() { cout << "\n Enter feet …  |
| | i am new to c++, currently working on an assignment, now i'm stuck in skipping the comment lines in the txt file. the txt file is something like this: #com1 A1 A2 A3 #com2 B1 B2 B3 ... what i need to do is to enter commands to display the … |
 | Hey, I am not stuck on this or anything just a bit confused about if this is the right way to go.. Well i was wondering on the river (five cards that go into the middle of the table) i am going to make them random and that is no …  |
| | I'm confused about the use of the dereference operator in the declaring of char arrays. I think I understand that the dereference operator is used to dereference memory addresses to their values, and also in an unrelated function in the declaration of pointers; and that arrays are like special pointers … |
| | hi Iam creating an application(vc++) which supposed to find the similarity between two programs written in c++ (at SYNTAX and SEMANTICS). in SYNTAX: i used the tokenize method and save it in strings...thats works but the question is here in the SEMANTICS: how can i trace the semantics in the …  |
 | Hi, all! How can i do handshake before using BIO pairs for encrypt/decrypt, if as transport i use Winsock(WSASend and WSARecv)? some example this is send function: [code] DWORD CSSLTLSLayer::Send(IN OVERLAPPED *pOverlapped, IN WSABUF *pBuffer, OUT PDWORD pdwWasSend) { size_t iBuffered = BIO_write(m_pSSLBIO, pBuffer->buf, pBuffer->len); BIO_flush(m_pSSLBIO); iBuffered = (int)BIO_ctrl_pending(m_pNetworkBIO); if … |
| | Hi! Programing a program with the fibonacci numbers, but having some problems getting the program to work as it should. The problem is that the user which is using the program are going to type a "max value" of how far he wants to count the fibonacci numbers. So if … |
| | hey guys do u know any good on line tutorial of graphs? ya i know there are many but i want the one which has source code to play around...... PLUS a detail description.... Thanx |
| | I want to split data in a string. The string will consist of several data. Before every element the length ofthe element will come. I want to exract data one by one. e.g. char * abc = "[length ]acsfdnhsjg[len]gvsdgdvheg[len]efgwetrge"; can someone help me!!!!!!! |
| | Hey all, When I write even a hello world script like below [CODE]#include <stdio.h> int main(void) { printf("Hello World!\n"); return 0; } [/CODE] the windows command line flickers when trying to execute it, instead of staying there and showing me ? Is there anyway to refresh or make this start … |
| | Hi , this pr. works with clases but someway it just throws me a error: [code] switch (atoi(i))//yes its an int 1,2,3,... etc... { case 1: R S(r, h);//create new class R object named S,to constructor we give two parameters F * f1 = &S; //yess pointers polymorph.... cout << … |
| | Hello, I am programming an image application for my thesis. I have got an image and I want to have the color of each pixel so I can make my own histogram. The problem is that I want to treat this histogram as an array but I don't know how … |
![Member Avatar for Run.[it]](https://static.daniweb.com/avatars/orig-avatars/avatar168980.gif){kind=avatar} | Basically this Menu works however, when I enter in a string the default does catch it but then the Menu repeats the error so in essence isnt full proof. Would the way around this be to check the 1st entry by the user to see if its an integer, if … |
| | Hi, I wanted to ask if you can help me with my example-sourecode to Wrap an C++ Object. I know Boost, but I don't want to use it cause of several points. Does someone knows an example code for an Object Wrapper? Thanks A LOT!!! [code=c] #include <Python/Python.h> #include <string.h> … |
| | I have commented the problem into the code below. See the Store2 vector in the Write Data function. I get error 0xC0000005: Access Violation with no warnings. Any help figuring out why would be appreciated. [ICODE] #include <iostream> #include <fstream> #include <string> #include <sstream> #include <vector> #include <stdlib.h> using namespace … |
| | Hi guys ! This has been killing me for 8 hours Things work well I'm compiling this way : [QUOTE] g++ -Wall -o prog prog.cpp -L/usr/local/sesam/lib -Wl,-rpath /usr/local/sesam/lib -Wl,-rpath,/usr/sesam/lib -ldl -lc[/QUOTE] But when I add a link to /usr/local/sesam/lib/libssv.so that i need [QUOTE]g++ -Wall -o prog prog.cpp -L/usr/local/sesam/lib -lssv -Wl,-rpath … |
| | Hi There, I'm learning C++. One of the questions requires a function to do a calculation below. I have no clue how to do this. Can anybody help? [QUOTE]WeTryToHelp gives bursaries to help students with buying their textbooks. The amount of money depends on how many modules the student passed … |
| | Typically the code that I have seen uses phrases such as i++ as opposed to ++i. Recently, in a recently purchased book, I have seen the former implemented. As I understand i++ means that the addition takes place after the line is executed and thus with the initial value of … |
| | Can someone help me with this probem please. Thank you. [code=cpp]#include <iostream> #include <iomanip> using namespace std; int main() { double pay_rate, hours, regular_pay; double overtime_pay, gross_pay, tax, net_pay; // The functions receive no parameters and return no results. // All communication is through the global variables. void Calculate_Gross_Pay(); void …  |
| | how make program run as service... I need the option in program, which program run in the background. Anybody has a tutorial about this... |
| | Hi, could someone please help me with this error message, I 've included my program along with the error message. Thank you. Compiling... C:\Documents and Settings\\Lab7\Lab7.cpp(33) : fatal error C1004: unexpected end of file found Error executing cl.exe. Lab7.obj - 1 error(s), 0 warning(s) [code=cpp] #include <iostream> using namespace std; … |
 | Dear all, I have this code and this data...but i want to sort the sum1 in descending order..but my problem is..i want to sort many array....like this.. after sort 3: ............. 46 1: .............. 25 2:..................20 how to sort in descending order together with the row? 1: 5 6 7 … |
| | hi everyone, i am struggling with a code and i need help! if u help me i appriciate... the result that i want to get is "value of myarray[0]=0.577 or 0.5" and the others value of myarray[1] and value of my array[2] is zero. i am using devc++ compiler. i … |
| | I am attempting to read in a comma delimited file and only take in the first three values. At the moment the code I have obviously does not work. The text file is laid out like this: [code]1249968.646,16761001.880,1206.990,1,2,104,3,218210.549527[/code] At the moment this is what my read in code looks like: … |
| | I have about 20 vectors like the example below inside a buttoncontrol that will push_back data. This buttoncontrol and all the vectors will read a .txtfile that takes up 1.5 MB. So together the 20 vectors will fill data with a total of about 20 MB when I press the … |
| | I am trying to include the posix library in my Visual Studio 2005 projects, and I am unsure how to include it. I have the posix.lib file and I added it to the additional dependencies of Configuration Properties->Linker->Input. When I build, I get the message that it can't find the … |
| | Write a function called calc() that receives two real numbers and a character and returns the sum, difference, product or quotient of the two numbers passed to it depending on whether the character is equal to a '+', '-', '*' or '/', respectively. Write another function that displays the following: … |
| | I am working on a recursive function that does multiplication so I don't have to use the * operator or loops. What I'm stuck on right now is how to get it to produce negative products. I thought the code for positive products subtracted from 0 would work, but I … |
| | Hello ppl I am new to c++ and especially a noob in graphics. All the functions I have learnt are from Help File in Turbo c++ 3.0. Since this part of c++ is not in my course, I am having difficulties learning it. Now, in the following code the[B] outtext … |
| | How make in MFC C++: i need a function, the function has read a txt file and put a message box with text which is in txt file. |
 | Hey, I'm having a problem with my RPG. I'm trying to get a player to move from one room to another. All the coordinates (and other properties) of all the objects inside a given room are contained inside a text file, and this includes the properties of an exit to … |
| | Hey guys, I'm at the losing end of a problem involving strings and char input. Basically, I have a tree full of morse code and alphabet equivalents in struct morsetree that i will decode against. so when i decode **** * *-** *-** --- *-- *** *-* *-** -**, i … |
| | A some point in my program, it is necessary for me to start a child process (Im on linux, btw, ubuntu gutsy). The process streams DV to stdout, but can be controlled in an "interactive mode" through commands to stdin. How does one establish streams going both ways? If you … |
| | [CODE] private: delegate System::Void delegate_function(void); if(this->InvokeRequired) { AsyncCallback ^ac = gcnew AsyncCallback(&WCS::MainForm::delegate_function_callback); delegate_function ^df = gcnew delegate_function(this, &WCS::MainForm::function_to_invoke); System::IAsyncResult ^asyncresult; //Begin invoke command here. try { asyncresult = df->BeginInvoke(ac, df); //asyncresult = this->statusLight->BeginInvoke(ac, df); //this->commsStatusLight->EndInvoke(asyncresult); //df->Invoke(); df->EndInvoke(asyncresult); //df->DynamicInvoke(ac, df); } catch (...) { std::cerr << "caught"; } } public: System::Void … |
| | I am trying to write this "program" for my distance ed course and I almost have it done I just can't figure out how to get the values from the function BoxDimensions into the function DisplayData so that it can print out the dimensions. Help???? Thanks. [CODE]#include <iostream> using namespace … |
| | Hi There, I'm a begginer in C++. In the program below the value must be returned to display the appropriate message. I expiriencing problems trying to compile the program. The erro message: [Warning] In function `bool passOrNot(char)': non-lvalue in assignment Can you help. Thanks #include <iostream> using namespace std; int … |
| | Hi all in here, It is said that system("PAUSE"), automatically generated by dev-c++ for console application, to prevent console window of disappearing instantly would be not standard c++, furthermore it would be consume much of a computers resources. What is a good replacement for it? I have been experimenting with … |
| | Hello, I am trying to generate a very large uniformly distributed pseudo-random number (around 15 digits, similar to Random.nextLong() in Java), the problem is that both rand() and random() only return int/long type (10 digits max). Is there any way to generate pseudo-random number in long long int type? Thank … |
| | For example I have string that contains hexadecimal numbers: std::string hexStr = "E110A3" and I want to convert it to char. So that char hex[3] = {0xE1, 0x10, 0xA3} How I can accomplish this? I tried to search but I didn't find answer to this. |
| | Help Me with this code. i JUST installed code::Blocks and am not familiar with the errors , I wanted to know what is going wrong with this? [CODE=CPLUSPLUS] #include <iostream> using namespace std; int f(); class Date{ int d,m,y; static Date default_date; public: void set_default(int dd,int mm,int yy); Date(int,int,int); Date& … |
| | i want to do program that calculat percentage of error percentage of error ={ X ( calculated) * X ( measuered) } * 100 / { X ( measuered)} and if the result more than or equal 50 it is bad if it is less than 50 til 20 it … |
| | Am trying to edit and also delete data in my text file but am finding a little problem...i want to read the specific text and the program stops when it reaches an end of line and not eof..i tried using '\n' but maybe I used it wrong cuz it cant … |
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