51,593 Topics
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| | Hello again everyone. I've been trying to finish this code that calculates the eigen digit (i.e. 2349 is 2+3+4+9=18=1+8=9. It wont give me a single answer though. And we are supposed to do it through a recursive function. The code looks like this: [code=c++] #include <iostream> using namespace std; int … |
| | Alright, so I am trying to create a program that will take a [m][n] Matrix and multiply it by a [n][p] Matrix, filling each matrix with increasing values. I am having a problem with my function, prototype, and call. I keep getting the "...not declared in this scope" error and … |
| | can u please temme the string funtion which will eliminate the character in the desired position in C++. ie in (string.h) example i need to remove the 4th character in "SACRED" so the resultant array must be "SACED" without a blank space in the deleted postion. so the size gets …  |
| | Hey, I'm not sure how to do this. I know how to convert a char into an int, getting the ascii value, or the numeric value, but that's not what I want to do. Basically I have a CHAR, I give it a value, usually a short sentence, then I … |
| | Hey everyone Maybe someone can help me with this. We are supposed to create a program that will read a .dat file and then output a new file containing the total number of rows in the data file, the sum of integers and the number of occurrences of the number … |
| | Problem background: gcc v 4.1 2 .cpp files, 2 .h files Files: main.cpp a.cpp a.h b.h Organization: main.cpp includes a.h (because it calls a.cpp code) a.cpp includes a.h a.h includes b.h (because a class in a.h uses a b.h class) There is no inheritance between a.h or b.h or any … |
![Member Avatar for Run.[it]](https://static.daniweb.com/avatars/orig-avatars/avatar168980.gif){kind=avatar} | In class weve been shown how to read from a binary file and read from a text file but Im unsure how to write text to a binary file? Heres my attempt so far, Can you help? [CODE] #include <iostream> #include <stdio.h> using namespace std; int main() { FILE *namefile … |
| | hi All can anybody introduce a good cds Training C++ . CDS Training sometimes can be good for taking some tips... rgds |
| | Hello Group Nice to meet everyone. First time posting to forum. I hope to have better luck then I did on Sourceforge.net forum. I am using DevC++ version 4.9.9.1. I am getting this error message in my compile log and I do not know how to fix this problem. Here … |
| | I want to override the normal keypress event Alt+F4 in my application. I am using borland builder 6. i wrote a fn for Application->OnMessage = msghandler; In this handler I am checking for the Key State of the Alt & F4 & then if the key is pressed I am … |
| | [CODE]#include<stdio.h> #define FILENAME1 "all.txt" #define FILENAME2 "even.txt" #define FILENAME3 "odd.txt" int main() { int i=0; FILE *all; all = fopen(FILENAME1, "r"); while(fscanf(all,"%d")!=EOF) { printf("\n%d",i); i++; } FILE *even; even = fopen(FILENAME2, "w"); FILE *odd; odd = fopen(FILENAME3, "w"); for(i=0;i<=10;i++) { if(i%2==1) fprintf(odd,"%d",i); else fprintf(even, "%d",i); } return 0; }[/CODE] |
| | typedef struct Individual{ int number_of_la; double cost; }Individual; void deleteIndividual2(Individual **ind){ if((*ind)==NULL) return; freeLists2(&((*ind)->MSC),1); freeLists2(&((*ind)->BSC),1); freeLists2(&((*ind)->LA),1); freeLists2(&((*ind)->BS),1); (*ind)->MSC=NULL; (*ind)->BSC=NULL; (*ind)->LA=NULL; (*ind)->BS=NULL; free((*ind)); (*ind)=NULL; } //LAList-LA-LA_BS ,if includeGroup=1 remove all LAList-LA-LA_BS otherwise List and element will be removed void freeLists(Network_Element_List *head,int includeGroup){ Network_Element_List *temp=head; while(temp !=NULL ){ Network_Element_List *x=temp->next; if(includeGroup) freeLists(temp->element->groupHead,0); … |
| | ok exploring the STL <set> if you entered the values say 1 to 1000 in order would it auto balance?....i thought no but then a friend of mine told me about this "red and black" tree and if i test the result times to find an element (random and numeric … |
| | I'm trying to design my UML diagram but I'm not sure about something. If I have a derived class that belongs to two other classes will the two other classes inherit the features of the base class? For example class Vehicle_Details inherits features from class People[I](is-a relationship AKA inheritance)[/I] while … |
| | I have to write a C++ function named MPG which returns the number of miles a car can travel with one gallon of gasoline. The function should have three parameters: the size of gas tank in gallons, number of miles traveled, and gasoline left in tank in gallons. this is …  |
 | Is there any reason why the code below won't work (I mean as far as writing output to file, not as far as writing the correct output to the file): [CODE] #include <cstdio> #include <iostream> #include <fstream> using namespace std; int main() { ofstream fout ("ride.out"); ifstream fin ("ride.in"); char … |
| | This is the first program I have had to do in 5 years so please don't be surprised by some of the mistakes. I am creating a program that will open a file and sort the integers inside that file using Insertion sort. There are 12 files and each as … |
| | does anyone know a site or something that can actually show me the code for strcmp and/or strcat?  |
| | Ok so I need to pull up records one at a time and then have the loop terminate when it reches the end of the input file using while and the istreamVar.eof() commands [code=cplusplus] #include <iostream> #include <fstream> #include <iomanip> using namespace std; int main() { ifstream ticketSale; int num2, … |
| | I wonder what the correct syntax is to delete All contents like below: [B]2D vector string vector double vector[/B] These 3 look like this: [code] std::vector<std::vector<string> > Word2(100, std::vector<string>(100)); std::vector<string> Word1(100); std::vector<double> Number1(100); [/code] Is it correct to do this: delete[] Word2; delete[] Word1; delete[] Number1; Thank you |
| | Hey guys, I've been having some trouble setting ios:: flags. In general I don't use [inlinecode]using[/inlinecode], but without it what I do doesn't work. [code]#include <iostream> #include <iomanip> using namespace std; int main() { double moneys = 5.2; cout << "$" << moneys << "\n" << "$"; cout << setiosflags(ios::fixed) … |
| | Hi everyone, I am new to this online forum. I am a software engineer residing in Singapore doing software development for a living for past 9 years. Only recently am I introduced to the wonders of ACE. It is such a pity the ACE framework is not part of the … |
| | Note: second post contains more info about where I'm having a problem... what I'm expecting to do and what the program is actually doing. Hey all, I'm finishing up an assignment for my C++ class and I can't figure out why the program stops in the middle of it. The … |
 | I am a noob that is currently trying to learn C++ for a programming class in highschool, and I am having difficulty with a particular project. Basically, I have to create a number guessing game that lets the user play as many time as he or she wants, while telling … |
| | Ok, basically where i'm hitting a stumbling block here is that i need to be able to create an array of this sort: [U] SAMPLE INPUT FILE (Use EOF to terminate)[/U] 1121 15.12 40 9876 9.50 47 3333 22.00 35 2121 5.45 43 9999 10.00 25 those three columns are … |
| | Hi, Currently trying to ./configure;make;make install a program called gmsh. I installed gsl through cygwin. However, everytime i try and ./configure the program gmsh, i get: [CODE]****************************************************************** This is the free version of Gmsh and configure could not find the GNU Scientific Library (GSL) on your system: - if it … |
| | Hi, I am designing a code breaker program that works out letter frequency in a text file and tries to codebreak using the frequency that letters appear in the english alphabet, however at the moment it is only outputting whatever is at the end of the decry array. Thank you … |
| | Alright, so I've got a Merge Sort program working that accepts a text file, and is supposed to split the data from that one text file, into TWO different text files. This is however, just putting them into one =x Any idea as to why? here's part of my code: … |
| | Ok, so Im gunna make an Embeded Browser Based Application Framework Development, you know, kinda like java or flash. How would I go about this? Links? Tutorials? Anything? And dont just say "if yo dont know how this works you shouldnt be trying it.", because if noone teaches me how … |
| | I'm teaching myself C++ through googling (my class has no textbook, if you can believe it) so I apologize in advance for my (probably) incorrect terminology. I want to name individual incarnations of a struct by numeric information supplied by the user. Here is a snippet: [code]int main (void) { … |
| | Here's the problem: Ask the user for a floating point number until the user enters a negative number or zero. After each number the user enters print the highest and lowest number so far, and the average so far. Do not print the highest, lowest, and average when the user … |
| | i wanna make a .com file. i mean command.com file. i m using visual C++ 6.0. i know the way to make the EXE files but dont know how could i make a COM file |
| | Hey, my name is Alberto i am just starting to lear all about programming with C++ and one of my assignments is to open a file data1.txt into the program using ifstream inData where inData is the name of the variable for my file. the problem i have found is … |
| | I have another question for my homework. Here is the problem: Keep inputting numbers from the user until the user enters a 0. After each number, print a "running average". That is, print the average of the last three numbers entered. Be careful how you handle the first two numbers … |
| | Can anyone please explain to me the detials of what the fork command does?? Like wat is the Pid of the parent for a child created using this command.. again also it is said that it creates a replica of the currently running process what does this exactly mean?? Do … |
| | [CODE]frequency[ grades[ 2 ] / 10 ]++; [/CODE] here assume that grades[2] includes 87, divided by 10 it equals to 8.7, which equals to[CODE] frequency[8.7]++;[/CODE] so is the decimal removed ? or is it rounded to 9 ? |
| | hey everybody, I'm in an Intro to Programming with C++ class and I need help with an assignment. Is there any way to declare variables or arrays in Hexadecimal? If so, how should I do this? If this isn't possible, is there any way for me to indicate to the … |
| | This might be really simple or impossible, but what I need to do is somehow take what the user inputs in the client code, and set one of my variables in my constructor to the variable in the client code. This is my client code [code=language] int main() { StackType<int> … |
| | I have to wrtie a valid C++ condition (Boolean expression) for each of the following checks: (naming my own variable when needed) [code] if the value of the variable GPA is between 3.0 and 3.6 excluding 3.0 and 3.6. if a voter is at least 18 years old and had … |
| | Is there anyway to just download a web page in c++? I need a program that can download a webpage at certian times of the day to get updated information. Is this possible? and if so how? |
| | In C++ is there a way to define a class to be "comparable"? What Im trying to do is write a class that holds a string and a vector of numbers. If an object of this type is compared to another object I want the string that each object contains … |
| | Hello... How can I check whether My computer is connected to the INternet or not using a C++ program.. :S |
| | I can make a box with a char quite easily where the user enters two values L, and W using a for loop but I don't know how to make just the outline. I'm told there are 2 if else statements needed and I've nested my for loop. I don't … |
| | [CODE]int k = 0; int g() { k = k + 1; return k; } int D[] = {13, 19, 47, 3, 7}; ….. D[ g() ] = D[ g() ]++ — D[ g() ]++;[/CODE] According to a book from which this problem comes this code will generate 5 to …  |
| | Hello I'm trying to make a simple function to Rot13 strings and it's not working.I ran it through my debugger and it works until it get to the top of the loop again???Then some of the chars are rot13ed and some stay the same. [code=c++] void Rot13(std::string &buffer) { int … |
| | I am using a program called FunEditor, I doubt many people know about it, but if you do help is requested. Before I go into my problem I will explain ProjectFUN a little bit first. Basically it is a C++ 2D game making program that is slightly simplified and does … |
| | Can anyone tell me why this is happening? All the code and input files are below. Stack.h [code] #include <iostream> #include <vector> using namespace std; const char FILE_NAME[] = "palindrome.txt"; typedef char StackElement; class Stack { private: vector<StackElement> myVec; public: bool Empty() { return (myVec.size() == 0); } void Push(StackElement … |
| | which accepts an integer of arbitary length as an input and takes maximum polynomial time to execute , let us define a language L= {n | P does not crash for any input of size n} How is easy or difficult to prove that L belongs to NP ?  |
| | Hello, I have an array with 10 random numbers ranging from 1 to 10. I'm trying to write a function that would create a new array which would contain the number of times a number apperead in the first array and return a pointer to it. For example: if the … |
| | Looking for the best way to search a string for project that must test for bad input. Must be able to detect wrong characters, letters, etc. |
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