51,593 Topics
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| | [code] void test(std:shared_ptr<some_type> A) {.....} [/code] would make a copy of a shared_ptr what if we pass a shared_ptr into a function like [code] void test(std:shared_ptr<some_type> const &A) {.....} [/code] Is this safe? Thanks a lot |
| | When on the digital mars website he advertzed that their compiler could use all 80bits of a 32bit machine. What the heck does this mean?  |
| | So I need to do this following program and I'm totally confused at the moment. Can someone please help me? Your help will be greatly appreciated. Objective: 1. Write a program that incorporates function modules 2. Use appropriate function declarations 3. Use function headers and write function procedure 4. Use … |
| | Hi All, I am tring to using the below function to read in a .txt file, which consist of a 10x10 matrix number. I just cannot find out where goes wrong, it appears such a funny number -858993460... [CODE]void readinput(int in[][MAXCOLS]) { int row ,col,ip; //Declare row,col, ip as int … |
| | What is the difference between Release and Debug modes in Visual Studio while building a project?  |
| | Ok simple question. Google didn't bring up much and I need this. This is the question: How do I interact with non-text files in a simple console app? |
| | i want to do a project using graphics in c++..i am going to start with a simple project, because i am a beginner.. plz tell me which websites to refer in order to get help on topics and to learn about graphics in c++.. thank you.. :) |
| | why encapsulation voilate at the binary representation of any source code? |
 | So need to use C# to create this tool I want for a game. It will involve an interop between Excel and my own program so I can easily tweek values on some items in my program or through excel. So far it's going ok, but when I'm constructing the … |
| | [code] void test_rr(std::string const &lvalue) { std::cout<<"this is lvalue"<<std::endl; } void test_rr(std::string &&lvalue) { std::cout<<"this is rvalue"<<std::endl; } int main() { test_rr("this is"); //will output "this is lvalue" std::cout<<"system pause"<<std::endl; std::cin.get(); return 0; } [/code] how could I treat "this is" as rvalue reference? The easiest way I could think … |
| | I have been asked to implement airline Reservation Simulation system using Data structures as part of B.Tech Minor Project. I have good knowledge of C++ but none of Visual C++ (except how to draw forms). But we also need to implement UI. So we are thinking of implementing UI using … |
| | Hello. I have a problem and I would love it if I could get some insight on it. I have read the forums with many answers about the subject, but I'm still having problems so I'm writing here. Basically I was following [URL="http://tom-shelton.net/index.php/2008/12/11/creating-a-managed-wrapper-for-a-lib-file/"]this[/URL] guide which is for creating Managed Wrapper … |
| | I'm using Visual Studio 2010, Win 7, MS Access 2010, C++, Direct ODBC, 32 bit. The first SELECT statement executes. The INSERT, SELECT, SELECT and UPDATE statements don't nay help is appreciated. Thanks. [CODE] #include <windows.h> #include <stdio.h> #include <sqlext.h> const char* DAM = "Direct ODBC"; SQLCHAR szDSN[256] = "Driver={Microsoft … |
| | Just wondering, how high can c++ really count? Because I made a fibonacci program, and it starts acting weird and printing negatives at about 10-11 places. With both long, and int variables? Is it impossible to count higher? If not, how?  |
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| | I can not figure out how to go to the next line. In the data we read in number of test on the 1st line then student names followed by their test scores on the following lines. My problem is I can only get the first student and his average … |
| | What I want to do is read a whole paragraph of text from a custom file. How would I do this without doing something silly like this? [CODE]while(someFile >> word1 >> word2 >> word3){ //etc. }[/CODE] I need to be able to read 3 numbers for todays date, then read … |
| | Ok when I use gcc (all th time) the program it makes in c++ with debug on is around a megabyte when off it is around half a megabyte when working with c with debug on it around 50 k with it off it's at about25 k this doesn't seem …  |
| | [CODE] #include <iostream> #include <fstream> #include <string> using namespace std; string constestantName(istream &); void getJudgeData(istream &, string); void CalcScore(ostream &, string, double, double, double, double, double); double findLowest(double, double, double, double, double); double findHeighest(double, double, double, double, double); int main() { int loopnum, counter, nestcounter; string name; ifstream infile; infile.open("starsearch.txt"); … |
| | I make a program that reads a file and then it stores the information in two char.The problem is related to the char Elements and symbol. What is causing errors in my program? Thanks in advance. [CODE]#include "stdafx.h" #include <iostream> #include <fstream> char* Elements;//The problem char * symbol; using namespace … |
| | I have an assignment to create a file with number 1-20, and another one with numbers 100-5 decreasing by 5. I've got those two down, but then I need to multiply both those files together one by one and have the answer output to another file. ie: 1*100= 100, 2*95= … |
| | [CODE]#include <iostream> #include <fstream> #include <string> #include <iomanip> using namespace std; string constestantName(istream &); //Calls the the input file from main() by refrencea and returns the name of the contestant void getJudgeData(istream &, string, int); //gets the scores from starsearch.dat and stores them in five veriables void CalcScore(ostream &, string, … |
| | Hi, I have searched a lot of tutorials on how to make owner-drawn icon buttons, but a lot of them are a little bit hard to understand for API newbie and done in run-time, not with resources (I like resources!) so, can someone create/post some nice and simple tutorial on … |
| | I'm trying to compile this simple dot program with C++ that uses OpenGL. I made a struct GLintPoint to hold just points x and y. It seems I didn't delcare the struct according to the errors. [CODE]#include <GL/glut.h> #include <stdlib.h> #include <time.h> struct GLPoint { GLint x; GLint y; }; … |
 | [CODE]#include <iostream> #include <string> using namespace std; //char inventoryRequest = 'i'; //Function Definitions. void exitGame(); int playGame(); int main() { //Menu Text. cout<< "\t******Menu******\n\n"; cout<< "Please choose one of the following:\n"; cout<< "1 -Play Game.\n"; cout<< "2 -Exit.\n"; int choice; cout<< "Choice: "; cin>> choice; string name; switch (choice) { … |
 | Hi.. this is not a "which is better" thread, although if you happen to have a reason for thinking so, please share your thoughts. First I just want to say that I do not want to have any flame wars or arguments or anything like that. Please keep emotional arguments …  |
| | hello people. how are you all doing? my problem is i have been programming in c++ for almost a year now but i have always used windows with microsoft visual studio and dev c++ but now i discovered that programming in ubuntu is much more fun couz it is way … |
| | Hello everyone. I am having a problem with my program; it is supposed to read values from an input text file, put the data into a structure, then output the data from the structure into a binary file. The first 2 parts work fine, but I keep ending up with … |
| | Hello everyone I am a college student learning c++ and I am not understanding why you put a "For loop" inside of another one. What advantage does it have and what can you use it for. For example: [CODE]for (int i = 0; i < 5; i++){ for (int g … |
| | Hi. I have to write a program that solves the Knight's Tour in C++. The Knight's tour is where the Knight Chess piece has to move to every space on the chessboard only once. I am new to programming and I'm having trouble figuring out why my program has stopped … |
| | I'm using the Win32 API to create a game, and I want to give the player as big of a field of view as possible. The problem is, with the game engine I've developed (from Michael Morrison's [I]Beginning Game Programming[/I]), I can minimize and close the program, but I can't …  |
 | i want to write an algo about stack example.. that is, ""When a person wear bangles the last bangle worn is the first one to be removed and the first bangle would be the last to be removed. This follows last in first out (LIFO) principle of stack."" how to … |
| | Hi All, I am new to C++, I am tring to generate the random number from 0-99, and save it to a matrix array with the size of 10x10. Below is my code, the resule comes out funny. Can you help to see what goes wrong? [CODE]#include<stdio.h> //Header file #include<stdlib.h> … |
| | Hey guys im trying to write a code to give me Arthimetic mean and standard deviation for 4 Integer values... i don't know what im doing wrong it's not letting me compile any ideas?? [CODE] #include <iomanip> #include <iostream> #include <cmath> using namespace std; int main(void) { int X1; int … |
 | hello there it my first thread on this forum. well i need some help. See i am thinking abt making my own video player not for any project kinda thing but for my wish and knowledge. I am good in C and java, with help of C i learnt c++ … |
| | Hi i am currently creating a login screen for my project.The logical error with this code is that it does not display the message "invalid password" although i have written a code for it.Can anyone please tell me whats wrong with this code.Thanks in advance [CODE]using System; using System.Collections.Generic; using … |
| | hi, i'm trying to make a simple program to calculate the area and perimeter of a circle, but there's a little problem, whenever i enter a floating point number as the radius, like say 2.5 it calculates as if i entered only 2(without the .5) ( i hope that makes … |
| | I have to learn how to deal with socket programming because of my job(I don't have any experience about it) My company ask me to learn ACE because I have to maintain our ex and new products After I google the information from the internet, most of the users say … |
| | This is not a question about C/C++ as such, but I couldn't think of where else to put it. I would like to know how to call either gcc or g++ and specifying that all error messages that are to occur when compiling some source code are to be written … |
| | Can please help me how to use srand in c++ an how to generate infinite character please please... Help me to figure it out tnx ...:) |
| | Hi Guys, I have a database table where the field is type integer. In my program, i use [CODE]bstrTemp = static_cast< BSTR >(_myClass.m_QueryCommand.GetValue( 1 ) // using OLEDB consumer[/CODE] the variable "bstrTemp" is type CComBSTR. Lets say after retrieving the date from database, the value is 56(integer). When I execute … |
| | This is a famous Indian game called Hollywood-Bollywood. The rules are............ Create a program for the famous Hollywood bollywood game which will input the number of players and player names initially, Then it will ask for a movie to be entered by player (x+1) which will be solved by player … |
| | I am writing a program that reads customer info from a file, then reads transactions from another. I am building my ADTs for this as I cannot use templates for this class yet and have a cpl of issues. The linked list contains the clientID as an int and a … |
| | Hello all! I don't know what is wrong with my program. I know i'm missing something but still i can't figure it out. #define TRUE 1 #define FALSE 0 int search2Darray(int x) { int i, j; for (i =0; i< 2; i++) for (j=0; j < 10; j++) if (a[i] … |
| | Ok I'm working with a program that uses addresses and with all of the Interesting charecters (. / \ and spaces) I need tO get a line of characters. I know how to do this with ifstream but how would I do this with plain old cin?  |
| | Hi. I didn't declare a,b,c from the first program but i did after the first program. What am i missing? [CODE] #define m 2 #define n 2 void matrixaddition() { int i,j; for (i=0; i<m; i++) for (j=0; j<n; j++) c[i] [j] = a[i] [j] + b[i] [j]; } #include … |
 | Please see that attached code. My output is as follows Please enter name : dog 0x7fff71771e60 Please Enter Type: Valid Choses Are (Game, Word, Compiler, Spreadsheet, DBase, Presentation : Game 0x7fff71771e60 Please Enter Cost: $ 20 Its like either the pointer or the getline is not clearing out memory properly. … |
| | I need to write a function that will use the delete command on a pointer. I'm in left field. See what I have so far any suggestions. I don't think I'm quite getting what I need to pass to the function and pass back. #include <iostream> #include "cdrom.h" using namespace … |
| | Can anybody tell me how to fix this...i've tried many ways but it still ends up the same...??? [CODE]//Ch7AppE03JV.cpp //displays an employee's name when the employee's ID is entered //Created/revised by Justin Victa on October 14, 2011 #include <iostream> #include <string> using std::cout; using std::cin; using std::endl; using std::string; int …  |
| | [CODE]#include<iostream> #include<fstream> #include<string> using namespace std; #define months 12 #define temps 2 void getData(int [months][temps],int,ifstream); void testcout(int [months][temps],int); int main() {int y=0; string skipwrd; int mainArray [months][temps]; ifstream in_data; ofstream out_data; in_data.open ("C:\\Users\\Worker\\Desktop\\Ch09_Ex09Data.txt"); getline(in_data, skipwrd); getline(in_data, skipwrd); in_data>>skipwrd; getData(mainArray,y,in_data); y++; getData(mainArray,y,in_data); } void getData(int locArray[months][temps],int x, ifstream locin_data) {int z=0; … |
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