if I want load the file as vector and I want to show on the screen using the new loop for why it only show the last lopp this is a example of my thought why is this not right?
int numb[3];
ifstream output;
output.open("1.dat");
while(!output.eof())
{
output>>numb[3];
}
//assuming there are 3 number in vector
for(int i=0; i<2;i++)
{
cout<<numb[i];
}
I have problem reading CSV file, i found many solutions but i still got one problem. I need to read CSV file and then these values show in List Control and here i have problem. Idk how to display it in List?
View 4 Replies View RelatedMy program writes a vector to a file in binary. I want to erase the vector, then read the file to repopulate the vector then display.
Basically I want to erase the RAM memory and be able to use the file as memory. This is my current code but it is not reading the file correctly. I have checked the file to see that the writing part is working.
void read_from_file(vector<Info> &vector)
{fstream file;
file.open("info.dat", ios::binary | ios::in);
if (file.fail())
{
cout<<" FILE DOES NOT EXIST ";
system("pause");
[Code]...
Reposting this as I deleted my pervious post because I missed out some parts of the codes.
I am trying to read a textfile containing some informations in this format,I am able to extract everything except the itemId.
Creating a Vector Array + Reading a file ....
View 1 Replies View RelatedThe aim will show on the screen but does not show the contents of a file on the screen different shows.
Code:
#include <stdio.h>
#include <conio.h>
main() {
char filename[100];
double xx;
int ii, kk;
[Code] .....
I want to update a file but I want to show the percentage when it is being updated. How can I do this? Do I need to use threads?
View 2 Replies View RelatedI have an MDI application using different menus depending on the current document template in use.
I need to show the top-level File Menu from the IDR_MAINFRAME window when a command is sent from the active document.
I would like to application to deactivate the active child window and then show the File menu as if the alt-F key was pressed from the keyboard.
I have tried CMenu *pMenu=AfxGetMainWnd()->GetMenu();
but this does not display the menu at all.
I have a cpp app that reads in a number of files and writes revised output. The app doesn't seem to be able to open a file with a ' in the file name, such as,
N,N'-dimethylethylenediamine.mol
This is the function that opens the file :
Code:
// opens mol file, reads in rows to string vector and returns vector
vector<string> get_mol_file(string& filePath) {
vector<string> mol_file;
string new_mol_line;
// create an input stream and open the mol file
ifstream read_mol_input;
read_mol_input.open( filePath.c_str() );
[Code] ....
The path to the file is passed as a cpp string and the c version is used to open the file. Do I need to handle this as a special case? It is possible that there could be " as well, parenthesis, etc.
My program reads data from a txt file and it displays the test scores and the sum of the scores, and it also shows the max and min from the scores , so far only one number shows up from the scores instead 10 and i think my sum is wrong too, but i cant get the max and min to work ...
#include <iostream>
#include <iomanip>
#include <string>
#include <fstream>
using namespace std;
void openfile(ifstream &infile);
[Code] .....
Consider the following piece of Code:
int ReadNumbers() {
int num;
vector<int> x;
cout << "Enter Numbers" << '
[Code] ....
The while loop is expected to terminate when the user provides an Invalid Input. But this while loop behaves unexpectedly when the user provides a 'Newline' input (by pressing Enter) and becomes an infinite loop. How can I prevent this from happening? Also I've heard that expecting invalid inputs isn't good code design. Is this true? If yes, then how can I solve my question without expecting Invalid Inputs?
I am currently working out on a problem in which a c program is to be made which shows a large text file in parts.
f
For example: If file contains 200 lines. 50 lines will be shown on first page and user is asked to press any key to move to next page until EOF is found. user is allowed to return to previous page as well, and this is very complicated task for me. I tried to move cursor to a specific position using fseek etc but it page doesn't stop and reaches to end quickly.
I've been taking a C++ class, and for a project we need to do, we have to create a simple quiz show game while putting the high scores and names inside a .txt file. We have lessons we can look at to complete it while learning. But at the end there's always a challenge that we should complete to show that we've actually learned the information. For the challenge, we needed to take the information in the .txt file and reset it to its original information. So say there's 5 people preset that have high scores, then a person plays the game and the program asks if they'd like to reset the list. If the user inputted 'y' or any key that needed to be pressed, the program would reset the .txt to its original information.
This is the code that creates the program.
// Include Libraries
#include <iostream>
#include <string>
#include <fstream>
// Include standard namespace
using namespace std;
// Declare Global Variables
int Guess;
int Winnings;
[Code] ....
It works how I need it to and there aren't any problems, necessarily, but I want to know if there's any, more efficient, ways of completing this task. Like if there's any already made function of resetting a file.
This is the code that resets the file. As you can see, it just uses the information earlier in the code inside the if statement. Is there any pre-made function or method of resetting a file?
cout << "Would you like to reset the high scores list? (y or n): ";
cin >> ask;
if (ask == 'y')
{
High_Score[0] = 25000;
High_Score[1] = 12000;
High_Score[2] = 7500;
High_Score[3] = 4000;
High_Score[4] = 2000;
[Code] .....
I'm trying to make program that will read text from a file and show what words occur how many times. I'm trying to make it so that if a new string comes, it saves it into wlist[], and counts 1 to wcount[]. If the same word is there, it will just add 1 to wcount[]. The program will end when it gets to the end of a file.
I don't know the reason, but I can't get strcmp and strcpy to work. I had to put a pointer in curword, just to make it compile.
Code:
#include <stdio.h>
#include <string.h>
#define LIST_MAX 100
#define WORD_MAX 20
int main(){
[Code] ....
Program background: Ticket Sales Details You will sell tickets in advance and at the door. Prices for buying in advance and at the door will be given. Also, the total number of tickets sold in advance will be given. Each guest will have a unique number. If there are n tickets sold in advance, then these guests will be numbered 0 through n-1. As the event starts, requests to buy tickets at the door may be made and these guests will be numbered sequentially, starting at the lowest unassigned number. The maximum number of guests will be 1000. The first line of the file contains the following three values, separated by spaces: Cost of the presales tickets (in dollars), Cost of the tickets at the door (in dollars), and the number of presale tickets. The first two values will be positive real numbers to two decimal places and the last will be a positive integer.
The second line of the file will contain one positive integer representing the number of auction items followed by a positive real value to two decimal places (at most) representing the minimum bid increment, in dollars. The first value is guaranteed to be 1000 or less and the second will be in between 1 and 50, inclusive.
The third line of the file will contain all the prices of the auction items, in dollars, separated by spaces, in order. Thus, the first price is the price of item 0, the next price is the price of item 1, and so on. These values will be real numbers represented to up to 2 decimal places.
The fourth line of the file will contain the three following positive integers pertaining to the raffle: the number of raffle tickets available, the cost of a raffle ticket in dollars, and the number of raffle prizes. (It's strange to have raffle tickets that don't cost a whole number of dollars.)
The fifth line of the file will contain each of the values of the raffle items, in dollars, separated by spaces, in order. Thus, the first price is the price if item 0, the next price is the price of item 1, and so on. These values will be real numbers with upto 2 decimal places.
The sixth line of the file will contain ten positive integers representing the number of each of the drinks 0 through 9, in order, that are in stock.
The seventh line of the file will contain ten positive real numbers with upto 2 decimal places representing the price of each of the drinks 0 through 9, in order.
The eighth line of the file will contain a single positive integer, numEvents, representing the number of events that occur at the charity ball. These events are split into two groups: actions by guests at the ball and awards given (raffle, auction, person, totalrevenue). All of the actions precede all of the awards. You will produce exactly one line of output for each event described. Here are the formats of each event that could occur:
If a patron buys a ticket at the door, a command will be on a line by itself:
BUY TICKET k
where k is a positive integer indicating the number of tickets bought at the door. These guests will be numbered as previously mentioned. You are guaranteed that the total number of tickets bought, including presales, will not exceed 1000. This is what I have so far and I cannot figure out why it wont calculate the total revenue. I am not completely sure if it is even accessing the if statement in main.
Code:
#include <stdio.h> #include <stdlib.h>
#include <string.h>
#define N 1000
[Code].....
I am reading a file then printing the data onto the other file. It is working, however when I check to see if each variable is being properly set after reading the file a issue arises.
Example of the file being read
Code:
Vehicle PV50CAN passed camera 1 at 05:33:26.
Vehicle W867BRO passed camera 1 at 05:33:29.
Vehicle KQ63ARU passed camera 1 at 05:33:38.
Vehicle K954ITQ passed camera 1 at 05:33:40.
Vehicle V220MXB passed camera 1 at 05:33:42.
[Code] .....
I am trying to write a program that will open a file with 2 points, take those points, determine what quadrant those points are in, and save the result back into the same file without truncating the data.
I'm having some trouble with my file I/O. I can't get my program to read the two values for X and Y that I put in the points.txt file. It simply uses whatever random number was used last time in that block of memory. In my points.txt file I put something like "4 -5" and it wont assign those numbers to my X and Y variables. I believe the issue is on line 25
#include <iostream>
#include <fstream>
using namespace std ;
int main() {
//defining X and Y
double X, Y ;
[Code] ....
If I am reading data from a .txt file with a person's last name and first name (e.g. Miller Andrew), How do I output the same data with the first name followed by the last ?(e.g. Andrew Miller) Do I use the ignore function?
View 2 Replies View RelatedI want to know how to read a .pgm file from my hdd and store it in a 2d array so i can perform some action on the array later on. This is ny first time working with an imqge in c so i know nothing about it. .
View 3 Replies View RelatedI have been given a task to make a c++ program that promptsd the user to enter a mp3 file name, read the ID3v1.1 tag and displays it. It then should prompt the user to to decide if they want to edit the comments section of it, then if they edit the section, it should re-print the updated ID3 tag. The list of genres are in a cstring that is as follows.
char genre[126][128] =
{
"Blues" "Classic Rock", "Country", "Dance", "Disco", "Funk",
"Grunge", "Hip-Hop", "Jazz", "Metal", "New Age", "Oldies", "Other",
"Pop", "R&B", "Rap", "Raggae", "Rock", "Techno", "Industrial",
"Alternative", "Ska", "Death Metal", "Pranks", "Soundtrack",
[Code] .....
Using the feof() function in the output file i have the last value twice.
This is the input:
1 3 6
1 1 4
0 3 1
1 1 6
0 6 2
1 1 6
And the output should be:
12
6
15
13
But using the feof() the last value appears twice:
12
6
15
13
13
How can i change that?
while(!feof(pfile1)) {
sum=0;
fscanf(pfile1,"%d%d%d",&choice,&day,&val);
if(choice==0)
[Code] ....
void Equipa::alocaDirector (istream &isV){
string _name;
string _age;
string _country;
while (!isV.eof()){
getline(isV, _name);
[Code] .....
I want this function to "copy" the first 3 txt lines to one position in the vector. Example
Directors.txt:
John
45
England
Mark
53
Belgium
With a print function this would be something like:
Name: John
Age: 45
Country: England
and the same for the second guy.
But something really weird is happening. I have this alloc function and then I have in the main() something to print it:
Equipa me1;
ifstream myFile;
string output;
myFile.open("/home/luiscosta/git/AEDA/AEDAP1/DB/MemEqui/Diretores.txt");
//if (myFile.fail())
while (!myFile.eof()) {
getline(myFile, output);
[Code] ....
which calls a new print function:
string MembroEquipa::imprime() const {
stringstream ss;
//ss << nome << ", " << idade << ", " << pais;
[Code] ...
And then I run it, this happens:
Name: 45
Age: 0
Country: Angel Lopez
Name: 50
Age: 0
Country: Armindo Pinto
Name: 43
Age: 0
Country:
Somehow my print function is skipping one line and I can't print anything.
Alright i have my program and it loads the vector fine and even puts the vector into a txt file but when it comes to lloading it again im not sure if it works or not
#include <iostream>
#include <string>
#include <fstream>
[Code]....
How to read a grayscale jpeg image in C++ ?
How do I write the code to read the jpeg file and store its content in a 2D array
I am practicing with C++ since I done most of C already and I have a problem with reading spaces from a .txt file.
I created a little program that creates a wannabe Cube in wannabe 3D xd, well to appear as 3D like:
Code:
cout << " O------O" << endl;
cout << " / /|" << endl;
cout << " / / |" << endl;
cout << " / / |" << endl;
[Code] .....
The actual code is a bit longer since it offers you to input the size and then it draws the pic. Now that wasn't so hard and I've done that but now I wanted to implement the "MessageBox" func for output.
I managed to write the cube in file cube.txt but when I'm reading from it 1 char at a time since I need to output as char array it avoids all spaces and new lines and just puts all symbols in the same row.
I didn't have that issue with C and I've found on stackoverlow a solution using strings & getline but I need it to be in "char" form.
How to actually read spaces and newlines? This is my current code for reading from file:
Code:
ifstream di("kocka.txt", ios_base::in);
char c[5000];
int br=0;
while( di >> c[br])
{
br++;
}
MessageBox(NULL, c, "Kocka", MB_ICONHAND);
di.close(); P.S kocka = cube (in croatian )
I'm writing a program using Huffman algorithm to compress text file. I have tested my program by just printing the printing ASCII character to file and it worked fine. However, now I have to implement using bits and my program doesn't work. It seems like I'm not reading or writing the right bits. Here is the result of my testing:In the input file I put abc the input file to compress it. Then I uncompress it the out out is aaa. Below is a snippet of how I read and write bits
Code:
class BitInput {
istream& in; // the istream to delegate to
char buf; // the buffer of bits
int nbits; public:
BitInputStream(istream& s) : in(s), buf(0), bufi(8) { }
[Code] ....