51,593 Topics
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| | Anyone knows what are percents... Some event has some chances to happen. From 0 to 100... if the percent is 0 it means zero chances to happen. 100 means it will happen every time. 50 statistically means it will happen half of times... But HOW can someone give x/100 chances …  |
| | So here's a pretty basic question. How do I access a file using C++? I want to be able to have the text file typed into the window of the program. I want to be able to write a string variable to a file, too. And another question, maybe not …  |
| | I have the following assignment due: Design a class -say, fraction - that performs the arithmetic and relational operations on fractions. Overload the arithmetic and relational operators so that the appropriate symbols can be used to perform the operation. Also, overload the stream insertion and stream extraction operators for easy … |
| | The following works on solaris, but doesn't compile on windows visual studio 6. is there a way to do this differently so it compiles in both places? In ComandLineArg.h ------------------------- class CommandLineArg { private: ..etc.. static int longestDescr; ..etc.. }; In CommandLineArg.cpp ------------------------------- CommandLineArg::longestDescr=0; Error on visual studio: error C2501: … |
| | Hi, im pretty new to c++ and i have created the program below, and for some reason it sets 1 or 2 arrays right then the rest just 0's, when it uses the same code, and the data is getting threw to the calls etc... i have no idea why … |
 | hello guys, I am making a browser for Dos (working in graphics mode) in c++. the problem is that i don't now how to get all the directories, file names in current drive (so that i can display their different icons). Kindly give me an example to get all the … |
| | I am having trouble undestanding this code, can someone please help. I dont understand what the for loops do also. [code] void Merge( long array[], long left, long middle, long right ) { long i, j; long temp[MAX_ARRAY_SIZE]; for( i = middle + 1; i > left; i-- ) temp[i …  |
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| | Related to my game again, i want to choose my options by typing the command. Yet, i am in a big difficulty, because switch() only accepts numbers, or it accepts one letter. Everyone knows how switch works, i dont think i need to give an example. Anyway, i will post … |
| | Hi! I use Turbo c++ 3.0, and i have been trying to write to video memory directly (0xB8 :eek: :eek: ). It works Okay in asm, how do i do it in c? (and i can't use inline asm for some stupid reason). |
| | I am trying to search for files in Directories. like, i have 10 directories..... and consider directory 1, which has 2 files.. this is same with all the files... i want to get a string from each of these files from 10 directories... to be written to a seperate file, …  |
| | I have this game skeleton. Now, as you can see, it is working, but when i choose something first time, i have to type it TWICE to make it work. It doesn't matter if i choose Status, Score, or Battle, or Flee, the result is the same: i have to … |
| | Hi Friends, Can anyone tell how to change the attributes of a directory through C or C++. I have tried to found in my compiler's help file but it was showing the method to change the file attributes but not the directory's. I want to change the attributes of a … |
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| | I'm developing a small database application that can add records to a file, but also modify them in a few ways. It keeps the records in a temporary object of my class PersonInfo. The problem now is that it doesn't want to display things correctly, it seems to only be … |
| | /*I used and modified a piece of code i found in here and my main(){} looks like this:*/ [code]int main() { HANDLE hConsole; char welcome_l1[100]; char welcome_l2[100]; char welcome_l3[100]; char welcome_l4[100]; unsigned short k=120; hConsole = GetStdHandle(STD_OUTPUT_HANDLE); ifstream file("ver"); file.getline(welcome_l1, 100); file.getline(welcome_l2, 100); file.getline(welcome_l3, 100); file.getline(welcome_l4, 100); SetConsoleTextAttribute(hConsole, k); cout<<welcome_l1 … |
| | hi guys, i am stuck... we have to show wats in a file.... then at the end show the grand total of the Profits .. heres the report func.... [code]void report() { struct Prods ssg; double prof; FILE *f; f = fopen("data.dat","rb"); printf("\n\n\n==============================================================================\n"); printf("Prod# Type Description Qty Cost Price Profit\n"); … |
| | I'm running into to this problem where the fstream is suppose to read data off a file to store in arrays. I cant continue with my project until the program reads it right. It is skipping some of the datas. Can I get a little help? Thanks in advance [CODE] … |
| | Hi Folks, I am new to Daniweb and new to C++. I will appreciate any help I can get.  |
| | Hi, I am just a beginner at windows programming, so I am wondering, how do I create a dialog-based application (similar to that of using VC++ and MFC) with just the pure windows API? Currently I am just doing the following, but I have a slight feeling in my gut … |
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| | [code]using dice std; # include <cstdlib> int dice( ) { int. random_ interger = rand ( ) cout << random_ interger << end 1 }[/code]<< moderator edit: added [url=http://www.daniweb.com/techtalkforums/misc.php?do=bbcode#code][co[u][/u]de][/co[u][/u]de][/url] tags >> . Write the member function definitions for each function listed: 1. Object Type: a pair of dice Knows: The … |
| | Cplusplus question I need assistance with defining structures: 1. Write the member function definitions... Object Type: a pair of dice Knows: The vaule of each face (1-6) Can Do: ROll for new face values Tell the value on each face. Initialize the die to have a value of 1 on … |
| | For some reason the code is not printing the error string in the output screen of the operating system. Go figure? This code is directly out of the book. [code]#include<iostream.h> #include<fstream.h> #include<stdio.h> #include<stdlib.h> #include<conio.h> ofstream fileout; ifstream filein; void main() { char file[20]; //you must type in filename and extension … |
| | omg i need help so bad. I've been working on a school project for what seems like an eternity and i'm close to deadline. Using FIFO's (i ahve to) to communicate between parent and child proc's. Right now I'm stuck on a read/write. fifomsg is a struct with int length … |
| | Hi everyone, I am still having a few issues with my program. It definitely runs but it just seems to run poorly. I think my problem lies within the following 3 sections Quicksort, Partition, and Insertion I've written comments next to each line of code just to make sure that … |
| | HAving trouble with my pointer arithmetic, any ideas appreciated My orgional code [code] Activity p[51]; for ( int i = 1; i <= n; ++i ) { // Read the activity records. pert >> p[i].i >> p[i].j >> p[i].pt >> p[i].prt >> p[i].ot; pert.getline(p[i].desc,21); [/code] converted but wrong [code] Activity … |
| | Good evening everyone, This next exercise, I have to do the following: Write a ClassTemplate for a linked list. Demonstrate it by using two linked lists. The datafield of the first type is int, the second one is double. What Ive got sofar is this: [code] #include <iostream> #include <vector> … |
| | hi guys, i am new bie in VC++. i want a project for finger print matching using VC++. if anyone have the same. please mail it to me with source code. i will be very thankful to him/her. I am champ in Java technology, if anyone facing any problems regarding … |
| | Hi. I have to write a program that will return the amount of all the vowels on a string.. I already did it, but it freezez during the execution :sad: . Any suggetions are welcome. ps.I must say that I am a begginer on this... :o Here is the code: … |
| | ok im stuck how do u print to the screen in the main file from a class? this is what im doin [CODE]ostream &operator <<(ostream &outs, const Point &p) { outs << "(" << p.getX() << ", " << p.getY() << ")"; // print out the value of the point … |
| | [COLOR=Blue][FONT=Arial Narrow]Hi. I am a begginer :cheesy: on the programming area and I am currently taking a course on C++. I have doubts :o about how to use the strchr function. Can somebody give me some hints? :?: Thanks.[/FONT][/COLOR] |
| | Hi, sorry I'm posting so much all off a sudden, but I recently found these forums, and they've been a lot of help. I'm have to read into the program from a file and output into another file. The problem is in function calculateGrade. When I output, I get a … |
| | can someone help me with this, or just help get me started. write the definitions of the functions to overload the increment, decrement, arithmetic, and relational operators as a member of the class rectangeType. write a test program that tests various operations on the class rectangleType |
| | Hi Im using C++ builder 6 and need to print off some text. The text will be in the form of strings. I guess I need to use TPrinter. Can someone point me in the right direction on how to print stuff out from C++. I need to be able … |
| | hi,, the program i made is soppost to reads 3 integers from user and solve the average, the maximum, the minimum and their median value..the problem with the program is that the median section is not working, can u please have a look at it.. [code]#include<stdio.h> main( ) { int … |
| | im a beginner in C++ and require help in developing a program that converts the price of a list of items from a text file from £ to euros. i am supposed to be able to edit this program so that there is a). GBP/Euro conversion rate. b). Data to … |
| | ok, so I'm supposed to write a program which allows the user to input 5 candidate names and the number of votes they receive. The program should the spit out the names, number of votes, percentage of votes received, the total votes, and the winner of the election. This is … |
| | Hello, I have a small app that uses pipes to do some basic client / server communication, just for testing purposes. Well, when the server is run before the client, it works fine. However, if the client is run before the server, there are problems. To solve this I wanted … |
| | I would like to design a program to implement a string of operation, such as: 1+3/4+5*5-(454*23-34) Then, it returns a correct answer. And what's the exact algorithms? |
| | Hello, I am new here looking for some advice. I belong to a programming group that intends to simulate hearing loss via software that we are creating. At the moment, we are looking to see how are we able to obtain sound from sound cards. What we intend to do … |
| | How do I use c or c++ code in Visual basic net? O |
| | hi, I need to find a way to get a list of all of the files in the current folder, so i thought i could have my program execute the 'dir' command into the command prompt and then parse what is returened. would anyone have any ideas on how I … |
| | I declare a array of pointers: [CODE]char *a[13];[/CODE] And how can I allocate memory for it using "new"? (I'm a Chinese student,so my expression may be not so exact~) |
| | 1, who can tell me the defference between "cerr" and "cout"? 2, if I will handle these operations, how can I do? [CODE]cout << 7/2 << " " << 7/0<<" " << 7/3;[/CODE] 7/0 is wrong,but I will let the codes continue, that is , let the result of 7/3 … |
| | please help...when case 2, 3, or 4 are chosen the program goes into an infinite loop except for case 1 which works fine.... [code] //this program performs addition (grades 1,2,3,4), subtraction (grades 2,3,4), multiplication (grades 3,4), and division(grade 4) #include <cstdlib> #include <ctime> #include <iostream> using namespace std; int main() … |
| | At runtime I obtain an instance of descendant of TObject (for example its name is TGoodForm). The definition of TGoodForm is unknown at compile time (I know that it is TGoodForm from TObject::ClassName()). [B]The question: how to create new instance of TGoodForm ?[/B] In another words, can I get address … |
| | LNK2022: Metadata Operation Failed (8013118D) Using MFC and meet with this error (__POSITION) Error ? In MSDN ,it says that ,"This behavior occurs because the compiler generated incorrect metadata for these anonymous structures. " and the Resolution is "To resolve this problem, add unique identifiers when you use Managed Extensions …  |
| | Please help, I am writing a program to take in 3 values and return the shape of a triangle. The program runs, but not quite right. Instead of returning the shape of a triangle, it returns a smiley face....which really surprised me. Can anybody help? The code I have is: … |
| | Hi I'm writing a program that is designed to have a user input the degree and coefficients for a polynomial with two variables, x and y, and i'm having trouble figureing out how to output the degree for the y, and tryin to ignore the term if the coefficient is … |
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