C++ :: How To Read / Edit CSV File And Continue From Last Login
May 5, 2014
I am working on a program that will do several mathematical calculation and will store the data into a csv file.The one below is just a prototype version of this.In my program,I will store my csv file as (current-date).csv using time.
With this in mind,I want my program to first check does (current-date).csv already exists.If not,the program runs normally and output all the data into the csv file.
However if (current-date).csv already exists,I want my program to read and edit that particular csv file,by skipping part1 in my code(name,id N etc.) and start with prompting the user for numbers straight-away.
In other words, if (current-date).csv already exists,the user should continue outputting the numbers from where the user last left before last termination instead of outputting the name,date & etc into the csv file again.
Eg: if no=22, continue inputting values from no=23 till terminating the program again and storing the values correctly into the csv file.
#include <iostream>
#include <fstream>
#include <iomanip>
#include <locale>
#include <string>
#include <sstream>
#include <time.h>
using namespace std;
// Program to read date N store it as currentdate.csv
[Code] ....
View 6 Replies
ADVERTISEMENT
Jul 30, 2013
I've been having problems with my loop that asks if the user wishes to continue or not. The required input should either be 'y' or 'Y', or 'n' or 'N'. Anything else should be counted as invalid, and repeat the prompt for input. The first few times I ran my program, the compiler does not read it as a loop. The next few times just won't work properly.
Here is the prompt:
Code:
void question() {
char option;
printf("
Do you want to continue? {Y|N) ");
scanf("%c", &option);
[Code] ......
As it is, it immediately runs the else option, but otherwise runs just fine. I suspect it could be because I have not specified a size for the option variable, but I try doing that, and the prompt relegates everything to the else.
(And also, here's the rest of the code. Basically, it just assigns a value to the letters of the word (a/A = 1, b/B = 2, etc.), adds these values, and determines if a word is prime or not based on the sum.)
Code:
#include <stdio.h>
#include <string.h>
#define size 30
int main() {
char letter, word[size], lower, upper, option;
int i, value, ans = 0, a, choice = 1;
[Code] .....
View 4 Replies
View Related
Feb 5, 2015
writing this program where you can search a structure array for existing elements, add new elements to the structure array, and find and display entire elements of the array structure and all.
Right now I am stuck on adding new elements to the structure array.
#include <iostream>
#include <string>
#include <iomanip>
[Code]....
Any methods to displaying the a array structure or editing it ....
View 6 Replies
View Related
May 10, 2013
This is a small program that reads a line from the screen, takes the ASCII values from the entered text, and edits it. Next, the ASCII values are reinterpreted (am i misspelling?) as text, and displayed. However, my final output has (allways?) at least 7 characters, even if you enter only one. I'm also trying to accomplish, that the part of the string which isn't filled, will be printed empty. In spaces.
compiled with -std=c99.
Code:
#include <stdio.h>
int main(){
int maxsize;
printf("How long is your message?
[Code] .....
View 6 Replies
View Related
Apr 16, 2013
Well,I have a dat file which following format;
ID Level(Manager or Executive)
Name
Sales(for 12months)
For example;
W00051 M
Lee Ah Moi
1200.00 150.00 1400.20 156.00 200.00 880.00 1500.00 8000.00 800.00 120.00 1600.00 1800.00
My question is how am i going to find the value 880.00 (August) & replace it with a new value?
Is it possible for me to open & edit the same file without creating s new one?
View 5 Replies
View Related
Mar 28, 2013
Can i edit records stored in file without rewriting whole file again .?
View 1 Replies
View Related
Aug 13, 2014
Its my 1st time using fopen,fprintf and others and i cant seem to edit my file via fprintf! Heres my program:
Code:
#include <stdio.h>
#include <stdlib.h>
char letter,check,nought,bleh,hi,a;
int main()
[Code]....
View 2 Replies
View Related
Aug 7, 2014
how to change a certain part of a text file? I want to +1 to a text file every time the user does a particular input. For example my text file has name << password << count . When the user logs in and choose option 1 the program will +1 to the count.
for e.g. Bob Bob123 1
when he logs in and chooses option 1.
it will change to Bob Bob123 2
View 3 Replies
View Related
Feb 12, 2015
What i'm trying to do is compile a text file to an executable, but the problem is that I want to be able to edit the resource file while in runtime, for example write something on a textbox, hit compile and get the executable file edited by the texbox.
Here's my codedom:
public static bool Compile(string sourcefile, string exefile) {
CSharpCodeProvider ccp = new CSharpCodeProvider();
CompilerParameters cp = new CompilerParameters();
cp.ReferencedAssemblies.Add("System.dll");
[Code] ....
Is there anyway I could do that?
View 2 Replies
View Related
Jul 6, 2014
I'm trying to edit an existing xml file but with no luck. I'm new to xml environment.
This is the xml content :
<?xml version="1.0" encoding="UTF-8"?>
-<mmp>
<ID>aaa</ID>
<clientID>bbb</clientID>
<time>2004-05-10T17:35:41.29</time>
<session>2000</session>
<Answer>Yes</Answer>
-<Program>
<_id>ppp</id>
</mmp>
I'm trying to change the time and id values and can't do it.I tried almost anything.
View 4 Replies
View Related
Nov 14, 2014
I have this project for school where I basically need to write a program that will take any text file and convert it into html code.
string line;
int lineCount = 0;
while (!inFile.eof()) {
getline(inFile, line);
cout << line << endl;
lineCount++;
}
cout << lineCount - 1 << " lines of text read in this file." << endl;
I have this block of code to print each line of the text file into the terminal window and count the number of lines printed. But I don't know how to make it change a single character or set of characters to something else. For example, if a line of text begins with the number "1", I want to be able to change it to "<h1>".
View 2 Replies
View Related
Jan 5, 2015
I have a report that's generated by a piece of software, and (I'm assuming because it was intended for Linux/Unix) when I open to read it in notepad, it has a bunch of funky symbols in it, and incorrect line feed characters instead of returns that windows uses.
I looked at the txt file with a hex editor and can see all the hex codes for the symbols I want deleted. One of the symbols 0A.
How can I do a "find and replace" command but do it with hex codes? These symbols cant be simply placed into my code file because VS does not know how to interpret it.
View 7 Replies
View Related
Feb 14, 2015
I am trying to make a simple login program that reads username and password from a text file.
In my text file I have:
name1;pass1
name2;pass2
name3;pass3
name4;pass4
name5;pass5
Everything is working okay with name1 and pass1, but if I try to log in with different credentials, for example name2 and pass2 it says "invalid details"
Here is my code:
string user, chuser;
string pass, chpass;
string los;
ifstream loginData("logindata.txt");
cout << "Please type in your username:" << endl;
getline(cin, user);
[code].....
View 5 Replies
View Related
Jan 30, 2013
I'm trying to make a program that you input your login info and it writes that info to a text file. Then, later on once I get my problem fixed, the program will read the info to the user. my code is as follows(the input part is a bit lengthy):
// Password Log
#include <iostream.h>
#include <fstream.h>
#include <string>
#include <time.h>
using namespace std;
ofstream login;
[Code] ....
What my problem is when I choose "Input new login info" it automatically inputs I have no clue, and calls next program.
View 3 Replies
View Related
Feb 10, 2015
i am working on a resx file. I have read the file and load it on data-gridview. now i wanted to be able to edit from the file and save.I have tried many ways but i didn't come with the solution. yesterday i tried this code below. I don't know how i can edit. here is what i have tried,
private void btnSave_Click(object sender, EventArgs e) {
foreach (DataGridViewRow _row in Gridview_Output.Rows) {
DataRow dt1 = oDataTable.NewRow();
for (int i = 0; i < Gridview_Output.ColumnCount; i++) {
Gridview_Input.SelectedRows[0].Cells[1].Value = oDataSet.Tables["data"].Rows[0][1].ToString();
[Code]...
View 1 Replies
View Related
Mar 15, 2013
Found an online suggestion of using an rc2 file and cut and paste stuff from .rc file to .rc2 file to see which line causes the problem but don't know how to create a blank .rc2 file. Problem started after I ported from VC++ 6 to VS2010.
View 5 Replies
View Related
Mar 28, 2015
I already tried getchar(); but it doesn't worked the program skips this command
View 2 Replies
View Related
Oct 24, 2013
I am just now in my first programming class for learning C language and I am stuck on one of my homework assignments. I am not asking you to write the code for me or anything because I want to learn by doing it myself but all I am asking for is some pointers to where I am messing up. My program is already finished for what she asked for but I am trying to do an extra credit where she wants us to have the user decide how big the gameboard is and how many mines to hide in it. Really I know that I need to use srand() and rand() but I am not sure how to use them to randomly place mines and without placing mines on top of others.
Code:
//Program 3 "Minesweeper" by Casey Samuelson
//10-17-2013
//This program will imitate the game Minesweeper.
//Agorithum
[Code]....
View 4 Replies
View Related
Feb 9, 2014
I was wondering how I could use a continue statement that continues in a nested loop. For example if I have
for (int i=0;i<amount;i++) {
for (int j=0;j<I[i];j++) {
for (int k=j+1;k<I[i];k++) {
if (P[i][j]+P[i][k]==C[i]) {
//What should be here?
}
}
}
}
If the condition is met then the most outer loop (in i) should continue to the next iteration.
If i simply fill in continue; in before the comment then it only continues the loop in k so that is not what I want.
View 5 Replies
View Related
Apr 20, 2015
My problem is , i want to make a simple calculator , in the console i want afterall the user to choose what type of operation he want pressing a key like i mentioned in the title the keys would be F1,F2,F3 , i'm not finding in the internet the code to the detection of a press key like what i want.
Code:
#include <iostream>
using namespace std;
int F1 (int x, int y) {
cout << "Enter a number: " << endl;
cin >> x;
[Code] ....
View 7 Replies
View Related
Mar 8, 2014
Basically we have to create a system for loan amortization for vehicle company. The code is still in its development stage and I am having problems with one of the menu selections. all the other menu selections work fine except for menu selection 3. I'm quite stuck on it. When I run the program everything goes well except when I enter 3 at the main menu, it just exits the program instead of going to the screen for the menu selection.
#include<stdio.h>
#include<conio.h>
#include<string.h>
main() {
char un, /*username*/
name, /*customer name*/
[Code] ....
View 1 Replies
View Related
Mar 17, 2015
what do I do if the while loop repeat iterating and do not stop running even if it did meet the conditions required?
View 3 Replies
View Related
Sep 18, 2012
i changed my code from release to debug mode. when i try to debug it shows a dialog box that '... does not contain debug information press ok to continue"..
View 8 Replies
View Related
Sep 3, 2013
I would like the coded ASCII image to scroll horizontally 3 times and then end with the message:
"Hit Enter to continue or Esc to end"
If Enter is pressed, the program should then continue to scroll another 3 times and then display the same message above.
If Esc is hit then the program loop should stop similar to an escape sequence.
Here is my code that partially accomplishes my objective:
Code:
// Professor.cpp : The entry point for the console application.
#include <iostream>
#include <string>
#include <windows.h>
#include <stdlib.h>
[Code] .....
View 3 Replies
View Related
Nov 25, 2013
I need to promote user to enter y/n in switch statement to continue or not for an other conversion after showing results of each conversion.
#include <iostream>
using namespace std;
int main() {
char a;
double n, r1, r2;
cout<<"Please Chose the Temperature Unit to Convert: "<<endl<<endl;
[Code]....
View 1 Replies
View Related
Aug 10, 2014
So this is the activity (LOOPING) :
Write a program that accepts a positive integer. The program should be the same from the given output. Use do while to allow the user to continue or not.
OUTPUT must be:
n = 5
0
1==0
2==1==0
3==2==1==0
4==3==2==1==0
5==4==3==2==1==0
if n = 6
0
1==0
2==1==0
3==2==1==0
4==3==2==1==0
5==4==3==2==1==0
6==5==4==3==2==1==0
View 2 Replies
View Related
