C++ :: Reading From File Using Getline
Mar 30, 2014i got a file (teams.csv) which has the following content:
id,name
501,Abilene Chr
502,Air Force
503,Akron
504,Alabama
Now i want to read line by line using getline(). How will i do that?
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C++ :: Reading In Data From A File And Using Getline Function?
Apr 19, 2013I am trying to create a program that reads data about different songs in from a file and displays the total length of all the songs and the average rating of all of them. Here is an example of the data that I would be reading in:
Just Give Me A Reason|P!nk Featuring Nate Ruess|4:22|4.0
When I Was Your Man|Bruno Mars|3:33|3.5
Thrift Shop|Macklemore & Ryan Lewis Featuring Wanz|3:55|4.5
I think my program is close to being done but for some reason it is not returning the correct length and average rating of all of the songs.
#include <iostream>
#include <string>
#include <fstream>
#include <cstdlib>
using namespace std;
// Structure declaration
struct Song {
[code]....
C++ :: Multiple Of CSV File Used As Input / Extracting Data To A Output File - Getline Function
Jun 4, 2013I have written a C++ program I have multiple of CSV file used as input, which I open one at a time and close it after extracting data to a output file which is the only file.
I run getline(inFile,line);
outFile << line << endl;
I run this code, and only part of it is goes to the output file I got, also have spacing randomly to specific file and inconsistent
But when I slower the code, like system("Pause") in the loop, I can get extract what I want perfectly....
Is my program running to fast, why getline would be skipping part of what things I want?
C++ :: Using Getline To Parse From A Text File?
Nov 23, 2014I'm trying to make a program where it reads a text file which contains "blocks" of questions like:
Type: multiple_choice
Question
Num_options: number of options
a) option1
b) option2
c) option3
d) option4
Letter of answer
and
Type: short_answer
Question
Answer text
what I'm trying to do is use parse those blocks and have it get handled by the classes, MultipleChoice and ShortAnswer.
I'm planning on using getline as a virtual function and have an if statement like
"if (string == "multiple choice)
** then get it handled by the MultipleChoice class "
C++ :: File IO Inside A Class - No Instance Of Overloaded Function Getline Matches Argument List
Jan 24, 2012Hey I am trying to use the getline() function to read a line from a file. For some reason Visual Studio 2010 gives me the following error. "No instance of overloaded function "getline" matches the argument list". The piece of code that produces the error is in a class in a separate .h file and is executed as a method of the object. I'm almost certain it has something to do with either the compiler thinking I am calling another getline in a different namespace or my parameters for the function are incorrect. Here is the code:
Code:
#include <iostream>
#include <string>
#include <vector>
#include <fstream>
using namespace std;
class InsultGenerator
[Code] .....
C++ :: Getline - Get Text File And Read Only First 100 Lines Of Text Content
May 31, 2013I am trying to get text file and read only first 100 lines of the text content using c/c++. how can i do it?
is it something like string line;
getline(stream,line);
??
C :: Reading From A File And Skipping Lines To Find String In File
Nov 26, 2013Program 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].....
C++ :: Getline Won't Work
Nov 14, 2013I've just started learning from "Jumping into C++". Great book. Unfortunately, I've also encountered my first snag. Practice problem number 3 from chapter 4 tells me to make a small calculator that takes one of the four arithmetic operations and its two arguments as input and give the result as output. Here's what my newbie mind came up with:
Code:
#include <iostream>
#include <string>
using namespace std;
int main()
[Code] .....
The thing that I don't get is why doesn't the function "getline" work. It's worked in previous programs. The program seems to work if I simply replace getline with a simple "cin". I could easily use that as a cheap fix but I am interested in knowing why "getline" refuses to work anymore....
C++ :: How To Check For EOF Without Getline
Mar 16, 2014I'm currently trying to write a while loop that checks if the text file has read all the contents inside. I've tried using
while(!in.eof())
but as usual it executes my loop an extra iteration, printing my last output twice. I am reading my data in from a method inside a class, so I cannot use getline as my while test to check if the file has read input or not. Is there any way to force my loop to check if the end of file has been read before the eof() test is executed?
C++ :: Using Getline And IF Operation?
Mar 13, 2015I am just trying to get a code going for a mock test and to get use to the getline and IF operations, but it seems I have ran into an issue[URL] is a link to the code I have written, and I can use getline to give a value to my variable, but it seems like it gets lost once I try to use the IF function. Am I not using the right variable type?
View 14 Replies View RelatedC++ :: Getline Ignores SOME Whitespaces
Dec 10, 2013I'm using getline to read in from a file line by line but it skips the first two whitespaces.
Example input:
1 0.7 mountain and grant
How it's being stored:
10.7mountain and grant
C++ :: Getline Function Does Not Seem To Activate
Feb 26, 2013I have just started working through "Jumping into C++". I am at the section on appending strings. The tutorial mentions the getline function but I can not seem to get it to activate. There is no mention of any other inclusions.
Code:
#include <iostream>
#include <string>
using namespace std;
[Code] ....
I note that the getline function color remains black while other functions are green. I presume this means that Codeblocks has not associated it with any of the listed header files. Has the tutorial omitted this detail?
C :: How Getline Function Works
May 15, 2013How the getline function works.
Code:
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int main() {
[Code] ......
getline(&inputstr, 128, NULL); getline gets a line in a data file.
I assume that inputstr[128] is the name of the file? why is the number of the array in the getline function....
C++ :: Getline Skipping First Time
Apr 25, 2014why does this happen that if i use
string ans;
for(int i=1; i<3; i++)
{
cout << "enter an option" << endl;
getline(cin,ans)
}
in a loop it always skips the first time but in the next times it asks?
C++ :: Getline As Conditional Of While Loop
Aug 1, 2014I am trying to use getline as the conditional for a while loop as seen below.
string filename, guard_name;
int call_number;
vector <Seniority> SeniorityList;
ifstream SeniorityFile;
[Code] ....
However, when I compile the code, I get the following error message on the line with the while loop.
error C2780: 'std::basic_istream<_Elem,_Traits>
&std::getline(std::basic_istream<_Elem,_Traits>
&,std::basic_string<_Elem,_Traits,_Alloc>
&)' : expects 2 arguments - 3 provided
The program will be reading in a .csv file, so I need my program to be able to deal with values separated by commas. Is there a reason why it will not accept that conditional statement?
C++ :: Getline Skipping First Line?
Aug 21, 2014text file is
hello
there
void readFile(char[], ifstream&);
address records[numbersAdd];
int main(){
char xml[30];
cout<<"Enter file name ";
[code].....
C++ :: Getline Is Not Displaying In One Line
Feb 16, 2014I used getline to import EMPLOYEE's First and Last Name from a txt file. After calculating the weights ans stuff. Now when i try to write to output txt file am having the below issue in which its not putting it in one line.
***CODE***
fout << "Note: This report for " << employee << " was prepared according to the fair practice of the University." << endl ;
***THIS IS WHAT ITS PRINTING***
Note: This report for FIRSTNAME LASTNAME was prepared according to the fair practice of the University.
I also tried like this;
***CODE***
fout << "Note: This report for " << getline(fin, employee) <<" was prepared according to the fair practice of the University." << endl ;
***THIS IS WHAT ITS PRINTING***
Note: This report for 0 was prepared according to the fair practice of the University.
this second code puts everything in one line but its showing 0 (zero) instead of the employee's first and last name.
C++ :: How To Use Getline With Switch Statement
Sep 17, 2014I have a problem with the switch statement because it doesn't prompt me to input something.
#include <iostream>
#include <fstream>
#include<cstring>
using namespace std;
//Compiler: Dev C++ and cygwin
void rd() {
string txt;
[Code] ....
I want to get rid of this kind of output ...
C++ :: Getline Overloaded Error
Dec 5, 2014I am currently having trouble to have getline to read line from the file. Error is: "no instance of overloaded function "getline" matches the argument list"
code is as follows:
std::ifstream config("config.txt");
string process[4];
int linecount = 1;
if (config.is_open)
{
while (config.peek() !=EOF)
{
getline(config, process);
linecount++;
}
}
C/C++ :: Getline Won't Wait For Input
Jun 6, 2014Down on line 74, it does not wait cor an input, it simply says ...you failed.
#include <iostream>
#include <string>
#include <Windows.h>
#include <cstdlib>
using namespace std;
//prototyping--
void flater();
[Code] ....
C++ :: How To Use Multiple Terminals In Getline Function
Sep 11, 2014I am reading a file of text. I want to read in every word, but no spaces or newlines. "word" is a string, and "c" is a char (used for getting rid of white space. The problem: I can get rid off spaces perfectly, but newlines remain in "word" if it comes before the terminating character ' '.
My code:
while(infile.good() && !infile.eof()) {
while(infile.peek() == ' ')
infile >> c;
while(infile.peek() == '
[Code] .....
C++ :: Getline Out Of Stringstream Should Not Cut Leading Whitespace
Jul 1, 2013I have a std::stringstream sstr I read data from with getline(sstr, s, ',').
Now I don't want it to cut off the leading blanks. How can I do that?
C++ :: How To Use A String As Delimiter In Getline Function
Feb 4, 2014How do I use a string in place of a character in the function getline?
For example,
getline(infile,lines,'}');
This works fine, but I want the delimiter of } to be "};", but I can't do this as it only takes in characters, not strings.
I want:
getline(infile,lines,"};");
Any way to get around this?
C++ :: String Termination Using The Getline Function?
May 28, 2013I came across a strange problem while writing a program using the getline function. I understand that when using the getline function an input string will terminate when the "enter" key is pressed and in the following program it works as one would suspect.
#include <iostream>
#include <string>
using namespace std;
int main() {
string str;
cout << "Enter: ";
getline(cin, str);
cout << str;
}
However when I use it in this next program (below) that I have been working on it will only terminate after pressing the "enter" key if the first character is a number, otherwise it will not terminate. So the question is: How do I get it to terminate the string regardless of the input order?
#include <iostream>
#include <string>
using namespace std;
int i = 0, j;
int numValue;
[code]....
Additional Info: the purpose of this program is to change a character, which is extracted from a string, into an equivalent numerical value, if the character is an integer, and assign it to an int variable. I plan on eventually adapting it to return the correct value of a multi-character integer such as 123.
C++ :: While Loop Is Not Being Executed With Getline As Argument
Dec 16, 2014This is the code i am working on: [URL] .... I had designed a cross platform grep and am revising it to making it more well for lack of a better word understandable, and clear.
The line
while(getline(file, currentLine))
Worked before but now it doesn't.
C/C++ :: Getline Not Allowing To Read A Sentence
Apr 15, 2014I wrote this program:
#include <iostream>
#include <ctime>
#include <ctype.h>
#include <vector>
#include <string>
#include <sstream>
using namespace std;
[Code] ....
LETTER OR '.' ? s
LETTER OR '.' ? f
LETTER OR '.' ? b
LETTER OR '.' ? e
LETTER OR '.' ? a
LETTER OR '.' ? g
LETTER OR '.' ? .
VECTOR : [ SFBEAG ]
SENTENCE ?
But after this i can't write anything. Do you know why? I've never had problems with getline... when i used cin >> it read but only one word. Now it doesn't even let read...