C++ :: Program To Read Series Of Comma Delimited Values From A File Into Vector
Aug 12, 2012
I'm trying to get my program to read a series of comma delimited values from a file into a vector. However, I am unsure how to actually go about doing this. I've posted my best guess below but it's really just a stab in the dark and I always receive a compiler error.
Code:
#include <iostream>
#include <fstream>
#include <vector>
#include <string>
using namespace std;
vector <string> v_input;
int main() {
ofstream fout ("Insert File Path Here.txt");
fout << "4, 8, 15, 16, 23, 42";
[Code] ....
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Nov 24, 2014
I am trying to write a way to properly format numbers by adding "," to numbers. Ex:
1000000 -> 1,000,000
30000000000000 -> 30,000,000,000,000
In the usual case, its an easy problem. But it gets tricky in my case, since I am working with numbers up to 30 digits, unable to store them in any int, long, long long. Due to this obstacle, the user inputs a number and each digit is stored in my array individually.
I need these commas to print as I am cout the array. This means I only have array length to work with.
I want to use modulus, but I'm not sure how this would work. I have:
void prArray(int Array[], const int arrSize) {
int mod = arrSize % 3;
int remainingSize = arraySize;
int counter = 0;
for(int i=0; i <= arrSize; i++){
remainingSize--;
[Code] ....
Which outputs the first digits correctly, but leaves 4 digits at the end:
235423452345 -> 23,542,345,2345
Likewise
2354234523450 -> 235,423,452,3450
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Nov 30, 2013
The code reads a text file delimited by colons : and formatted as follows
1111:2222:3333
How would I store the values separated by colons : into separate variables ?
Code:
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <string.h>
int read_file();
[Code] ....
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Jan 13, 2013
I have a file named "A6.txt" inside it has this code:
April Joe, 1, SUPER DUPER ULTRA SECRET, 02031982|
Matthews Jocob, 2, TOP SECRET, 11031992|
Garfield Kitty, 3, SECRET, 04041942|
Lake Bill, 4, MEH, 12031968|
Jones Betty, 5, WATCHLIST, 06031974|
Goodman Betty, 6, BANE OF SOCIETY, 05021952|
Very Simple, all it has is "Name, ID, Access, Date of Birth" (DOB needs to be formatted like 00/00/0000 if possible)
Output should Look like :
Client #1:
Name: April Joe
Access: SUPER DUPER ULTRA SECRET
DoB: 02/03/1982
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Oct 16, 2012
I have been trying to read a comma separated .txt file into an array and print it to console in C++. The txt file consists of two columns of double type data. For some reason the program runs, but gives blank output in the console. I want to know if I am doing something wrong. So far this is what I have:
#include <iostream>
#include <fstream>
#include <string>
using namespace std;
int main() {
int i=0;
double x[10];
double y[10];
string line;
[Code] .....
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Feb 10, 2013
The problem deals with writing a program to geta series of integers from a user and storing those values into an array. Then use a function called selection_sort, when given an array with n elements, the function must sort the array from smallest to largest values.
I have code, and im trying to get it to compile but im getting these implicit declaration errors and conflicting types. Here is my code and the compiler errors.
Code:
Compilation started at Sun Feb 10 20:14:48
gcc -Wall -o ex9-1 ex9-1.c
ex9-1.c: In function 'main':
ex9-1.c:16:5: warning: implicit declaration of function 'selection_sort' [-Wimplicit-function-declaration]
ex9-1.c:20:2: warning: implicit declaration of function 'prinf' [-Wimplicit-function-declaration]
ex9-1.c: At top level:
[Code] ...
Compilation exited abnormally with code 1 at Sun Feb 10 20:14:49
Code:
#include <stdio.h>
int main(void) {
int a[100], i, j, N;
printf("How many numbers will you be entering: ");
scanf("%d", &N);
[Code] .....
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Sep 23, 2013
This seems like a fairly straight forward assignment. Load up a file that contains a series of int values stored in ASCII and print out the ASCII characters to the console.
The problem I am having is that I am getting the numerical value of bytes ("40" for 10 numerical values, "200" for 50 values). The numbers are generated randomly by another file, but I can control how many numbers are generated. For example, if I type in:
shell% cat tempfile
the output is as follows:
/8?qE?. Y4?(T???a???%@
but when I try to run it with my program:
shell% ./intcat tempfile
the output displayed is:
40
Code:
#include <stdio.h>
#include <assert.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <stdlib.h>
int main(int argc, char *argv[]){
//check if arguments match
[Code] .....
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Sep 18, 2014
I am trying to get my program to calculate what point goes in what quadrant using a file. But msy program is not reading the values from the file and also it is not running so im not sure what's wrong with it.
//This program uses a fstream object to write data that will read the values of a (x,y) point from a file.
//add the appropriate preprocessor
#include <fstream>
#include <iostream>
[Code].....
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Dec 4, 2013
This is my code: [tag]
Code:
#include <iostream>
#include <string>
#include <cstring>
#include <vector>
using namespace std;
[Code] .....
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Jun 7, 2012
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.
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Jan 10, 2013
I have a network data file that looks like this:
2476
112
213
321
426
531
634
7312
843
945
...
...
...
The first row has two values - number of nodes (24) and number of links (76). Then it has all the link details (76 rows of data). I want to read this data. I have written out the following function:
First the structure definitions:
typedef struct {
int arcno;
int tail;
int head;
} arc_data;
typedef struct {
int forwardStarPoint;
int reverseStarPoint;
[Code] .....
The code is able to read the first line of data (i.e. it displays the numNodes and numArcs as 24 and 76). But then I get a lot of errors like this one
`Access violation writing location 0xCCCCCCD8`.
The program then crashes.
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Feb 5, 2015
I'm trying to write a program to find values for arctan of x by using taylor series. An initial value of x is given by the user and then it should print solutions from arctan(x) to arctan(1) in increments of x+0.1. It prints correctly but gives incorrect values after the initial x. I'm new to c and need some way to 'reset' the functions f1 and f2 for each increment of x (I think...)
Here's the code
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <iostream>
#include <fstream>
using namespace std;
int main() {
/* Define the beginning of the program and each variable. Also opens a text file to be written to */
FILE *f = fopen("arctan.txt", "w");
[Code] ....
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Dec 15, 2014
I'm trying to write a C program that will take a file that is delimited by colons and separate it out in to 5 sections:
0002:0003:0002:0080:<HTML>
0002:0004:0002:0080:<BODY>
I have the struct code in place but not sure how to actually store each of the 5 parts in memory. Here is the code below:
Code:
#include <stdio.h>
#include <stdlib.h>
#pragma warning(disable:4996)
struct contents
{
int source,destination,type,port;
char data[50];
};
[Code]....
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Nov 7, 2014
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.
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May 26, 2013
So i have this .dat file:
############################################
# fonts.dat #
# stores the proportional values for fonts #
############################################
# amount of fonts to expect:
[TOTAL_FONTS]
1
#
# 1st font... GTA HEADER
#
[Code] .....
how can i read values like [FONT_ID] and save them to some variable in code?
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Jul 7, 2014
Input file:
Course Of Sales.csv
Time,Price ($),Volume,Value ($),Condition
10/10/2013 04:57:27 PM,5.81,5000,29050.00,LT XT
10/10/2013 04:48:05 PM,5.81,62728,364449.68,SX XT
10/10/2013 04:10:33 PM,.00,0,.00,
How to read the csv file with my own vector class. I already have date.h,date.cpp,time.h,time.cpp
How to do the maintest and how to create the vector class
I need to show Date, highest price and Start time(s) of the highest share price
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Mar 14, 2014
I read one csv file in which it contains different types of data like string, integer etc.I want to fetch only integer data from that file and store in vector.Below i copy some code that read line from file,store in vector.I tried to convert string to integer or double and do some operations on it as i know that string values,but how to identify only integer values and store that in vector?
#include<iostream>
#include<vector>
#include<string>
#include<fstream>
#include<sstream>
#include<iterator>
#include<algorithm>
using namespace std;
int main() {
string line;
int cnt=0,val1,val2;
[Code] ....
input file like
Employee Code:121AEmployee Name :David
DateInTimeOutTimeShiftTotal DurationStatus
01-Apr-139:5919:53FS 9:53 Present
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Sep 22, 2012
the output of the password text file contains like this:
username
776655443322 (password encoded)
How to write the value in last line (3rd row) of the file. after that read and write or alter 3rd row value. I need logic using "C" language.
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Sep 22, 2012
correct the below code:
file already contains entries : 1st row username; 2nd row password.
check status required to write at third line and need to read or alter the check status value.
Currently this code is working if already there is a value for check status, then it is overwriting else UI hanging.
Code:
WriteCheckStatusToFile(BOOL& locVar) {
FILE *l_pFile = NULL;
CString l_strRememberCheck;
l_strRememberCheck = GetExePath() + _T("password");
CString sVar;
sVar.Format(_T("%d"),locVar);
[code]....
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Apr 14, 2013
What i try to do is to write a code which reads some specific values from a file and stores them in an array. My File looks like this
Code:
XFOIL Version 6.96
Calculated polar for: Myfoil
1 1 Reynolds number fixed Mach number fixed
xtrf = 1.000 (top) 1.000 (bottom)
Mach = 0.000 Re = 0.200 e 6 Ncrit = 4.000
}
[code]...
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Nov 4, 2014
For an assignment I have to write a program which basically converts 8 bit binary numbers to ASCII and outputs the assembled text. Here's the catch:
The 8-bit binary numbers are provided by some external file (which only contains 8 bit binary numbers); the name and hence length is not known. The external file is called with a pointer upon execution
(./"conversion program" < external_file.in).
I'm getting the 8 bits as a string, calculate/convert decimals, output char type. HOW do I know when to stop the loop? If I just pick an insanely high number I get random stuff at the end; no boundaries obviousely lead to an infinite loop. Can I determine the lenght of this random ext file somehow nonetheless?
Is it possible to create a vector which dynamically adjusts itself until there are no more strings = end of the file?
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Oct 21, 2012
Text file can conain one or three integer values in string. How correctly and simplicity read this string?
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Nov 3, 2013
My project's goal is to read some numbers from input file,then create a grid.my input file is:
2 3
3 4 5
1 2 4
first line is rows and colums. second and third line the grid location values.My code is
#include <iostream>
#include <fstream>
#include <cstdlib>
#include <string>
#include<vector>
using namespace std;
[code].....
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Feb 20, 2015
I have tried with some logic for removing comma operator in test.ini file but its not working how to remove comma and get output. For example:
Input
inside test.ini file the name is in format,
ajs,18.0,15.0
expected output
ajs 18.0 15.0
but I am getting,
ats,18.0,25.0 2686760 4200912
Code:
#include <stdio.h>
#include <stdlib.h>
int main()
{
FILE *fp;
char strConfName[25] ;
float a,b;
[Code] .....
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Feb 26, 2013
Why isn't this program working?
#include<iostream.h>
#include<conio.h>
void main() {
clrscr();
int n;
float x, t, sum=0;
[Code] ......
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Apr 18, 2013
I am attempting to read in a file that has 4128 sets of 21 numbers separated by commas and write it into an array. I now know that in order to use fseek, I have to make my array a character array, but I need my function to read in decimals (ex: 0.172635). I'm reading in
0.102598,0.000000,0.000000,0.000000,0.000000,0.307 793,0.000000,0.410391,0.102598,0.000000,0.102598,0 .102598,0.000000,0.000000,0.102598,0.102598,0.8207 83,0.000000,0.000000,0.000000,0.000000
and keep getting numbers like 48 49 50.
Code:
void CSread(char filename[100], char array[22], char array2[22], unsigned int arraysize)
{
char genename[32];
double temp = 0;
FILE *CSfile;
CSfile = fopen(filename, "r");
");
[code].....
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