C++ :: Getting Data From A File And Outputting

Apr 17, 2013

I am given a data file that contains sports data for 24 people. There are two rounds of the event. The first 48 lines of the file give the data for the 1st round and the second 48 lines give data for the 2nd round. The file looks like this:

Azrin, Neil
2.3 6.0 5.0 6.7 7.8 5.6 8.9 7.6
Babbage, Charles
2.3 5.6 6.5 7.6 8.7 7.8 5.4 4.5
Burks, Arthur
2.8 4.5 5.4 6.6 7.7 8.8 5.6 6.5
Crick, Francis
1.6 6.5 6.5 6.5 7.3 7.5 7.8 5.6
and so on ............

This data continues for all 24 people and then repeats with different score values for the second round. The first number after the persons name is the level of difficulty and then next 7 numbers are the scores. I am trying to get this data out of the file and set it up in the following format:

Name Of Person
Round 1: level of difficulty scores
Round 2: level of difficulty scores

So the table for the above data would look something like this:
Arzin, Neil
Round 1: 2.3 6.0 5.0 6.7 7.8 5.6 8.9 7.6
Round 2: 2.1 6.0 5.0 6.5 7.8 5.6 8.8 7.6
Babbage, Charles
Round 1: 2.3 5.6 6.5 7.6 8.7 7.8 5.4 4.5
Round 2: 2.3 5.4 6.5 7.6 8.7 7.2 5.4 5.5

And so on for all 24 people. This is the code I have for it, but it just reads the file directly:

// I have already opened the file!
while (inFile) {
string name;
getline(inFile,name);
cout << name << endl;
}

How I can do some sort of formatting on this data?

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C++ :: Outputting Data From File Into Structs And Arrays Of Structs

Apr 15, 2013

I am having a lot of trouble being able to get data from a file and input it into given structs and arrays of structs and then outputting the file. We are given a file that contains 96 lines and looks like this:

Arzin, Neil
2.3 6.0 5.0 6.7 7.8 5.6 8.9 7.6
Babbage, Charles
2.3 5.6 6.5 7.6 8.7 7.8 5.4 4.5

This file continues for 24 different people and then repeats with different scores (the second line).
The first number, in this case is 2.3 for both people is a difficulty rating. The next 6 numbers are scores.

We are given this data in order to set up our structs and arrays and my code:

#include <iostream>
#include <fstream>
#include <iomanip>
#include <string>
#include <cmath>
using namespace std;
int main () {
ifstream inFile;
inFile.open("C://diveData.txt);

[Code] .....

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C++ :: Outputting Associated Data In Struct

May 2, 2013

So this is the last part of a program I've been working on for four weeks now. This question may be a tough one considering the amount of files included in the program.

The program is to read in a file of requests between two cities, read in a file of flights and cities that occur between the cities. It then checks to see if there is a path between the flights and output an itinerary. I have the correct itinerary outputting, but when attempting to output the associated flight number and price according to the city, I am getting odd data. How can I output the correct flight number and price associated with each flight on the itinerary.

I'll post out the output I am currently getting and the section where I am outputting the data. I'm sure I'll need to post more files so the program can be understood.

Don't want the code done for me, just a point in the right direction! I don't want to let this program defeat me!

Output: Code: Request is to fly from Atlanta to San-Diego.The flight itinerary is:
Flight # From To Cost
10 Atlanta Chicago $134529069
10 Chicago Miami $134529069
10 Miami Dallas $134529069
10 Dallas San-Francisco $134529069
10 San-Francisco San-Diego $134529069
This function finds a path between cities. Code: bool flightMap::IsPath(string originCity, string destinationCity){
StackClass aStack, bStack;
flightStruct flightRec;
string topCity, nextCity;
bool success;
int index = 0;

[Code].....

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C++ :: How To Stop Outputting Data Based On A User Input

Sep 27, 2013

how to stop outputting data based on a user input. The text file is as follows:

1. a
2. b
3. c

and the code I'm using is as follows:

int main (){
string line;
int search;
cout << "Enter a number from 1-3" << endl;
cin >> search;
search++;
ifstream myfile ("example.txt");

[Code]...

What I want to do is to just output number 1 (the whole line) if the user enters number 1. However, I get an error on the second condition w/c is the "&& line!= search"

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C/C++ :: Getting Error When Outputting To File

Sep 5, 2014

it isn't actually writing anything to the file. It is opening the employeesOut.txt file but not writing anything. I'm getting the error

libc++abi.dylib: terminating with uncaught exception of type std::invalid_argument: stoi: no conversion
(lldb)

I believe the error is within my main.cpp, so here that is, I have multiple classes.

#include <iostream>
#include <string>
#include <fstream>
#include "Employee.h"
using namespace std;
bool openFileForReading(ifstream& fin, const string& filename);

[code]....

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C++ :: Zlib Outputting Blank File?

Oct 30, 2014

I wrote a program to compress a file with gzip, which works fine. I also wrote a program to decompress the gzip file, which runs but outputs a blank file.

Code:

main.cpp:
#include "decompress.h"
int main(int argc, const char * argv[]) {
if(argc == 3) {
decompressor(argv[1], argv[2]);

[code].....

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C++ :: Outputting Transactions From A Text File To Screen

Jan 19, 2014

I am working on a wage application with four options which are as follows:

Subtracts an amount from the shop bank account (The account is text file "shop"). You do not need to add the same amount to another account but you should record the transaction with a timestamp in a separate file. The application should prevent the account balance from becoming overdrawn.

List the five most recent transactions to the screen. If there haven’t yet been five transactions then list all of them.

Print the account name, number and current balance to the screen.

Exit the program.

I have completed 1,3 and 4 but I am completely stumped as to how to go about number 2.

#include <limits>
#include "stdafx.h"
#include <iostream>
#include <fstream>
#include <ctime>
#include <string>
int read_balance(void);
void write_balance(int balance);

[Code] .....

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C++ :: Outputting Partially Filled Array Onto Text File?

Jul 24, 2014

I have a partially filled array and I want to put that into a text file. Say I don't know how partially filled it is. How would I stop at the very end of the array where it has the last amount of data.

ex.
int array[9] = {1,2,5,6};
ofstream output("txt file");
for(int i = 0;i < 9; i++){
output << array[i]
}

How would I stop as soon as i becomes 4 because that is when the array stops?

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C :: File Operations - Fwrite Padding Extra Data In File Compare To Data Provided As Input

Oct 28, 2014

I am trying to write my files to another subfolder . Below is my program.

Code:
cat th6.c
#include <pthread.h>
#include <stdio.h>
#include <string.h>

#define SIZE 8
#define NUMELM 8

[Code] ....

I observe my filename along with directory as text in the new file created in sublfolder. This is output.

[cporgs/apue/threads]: mkdir first
[cporgs/apue/threads]: ./a.out test.txt first
test.txt -- first/test.txt
dfdfdfdfdfdfdf-14
dfdfdfdfdfdfdf-14
in thread test.txt first
[cporgs/apue/threads]: cat first/test.txt
dfdfdfdfdfdfdffirst/test.txt
[cporgs/apue/threads]: cat test.txt
dfdfdfdfdfdfdf

I could not able to get from where this filename and folder is getting added.

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C++ :: String Outputting Twice?

Nov 3, 2014

When I run the program, the prompt I am giving the user before I collect their data, shows up twice in row. Here's the part of the code I'm referring to:

#include <iostream>
#include <string>
#include <algorithm>
using namespace std;
// method prototypes
void characterInstructions();
void phraseInstructions(); //

[Code] ....

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C++ :: How To Pause After Outputting Results

Feb 19, 2013

I mean on the executable file. It just displays the results and quickly flashes away, cin.get() has no effect and system("PAUSE") is undeclared.

I never found a single sure way to pause effectively. Is there a method that works all the time? Sometimes cin.get() gets skipped even in the code itself. The IDE I am using is Code Blocks if that matters any.

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C++ ::  NCurses Outputting Vectors

May 19, 2013

The following code works perfectly with "normal" C++

#include <iostream>
#include <vector>
int main() {
std::vector <std::string> hello {

[Code] ....

This prints "HELLO" on the screen. A function a bit more like NCurses is:

for (std::vector <std::string>::const_iterator it = hello.begin(); it != hello.end(); it++) {
std::string temp = *it;
std::cout << temp.c_str() << std::endl;
}

This still works with "normal" C++. Now, how do I get this working with NCurses? I tried

#include <curses.h>
#include <string>
#include <vector>
int main() {
initscr();

[Code] ....

But this just gives me an empty screen.

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C++ :: Outputting Randomized Arrays

Apr 7, 2013

For an assignment I am having a user enter the name of a file that contains "Song Data" the file is set up like this:

(example)

1012 C
3333 R
90 E

And so forth for 15 lines. The first value represents the song Id and the second is a character C, D, E, or R that represents the type of song. After the file is opened I have two parallel arrays that are read from the file:

1. int songId[15]
2. char typeOfSong[15]

I am able to read the entire file, which symbolizes playing the playlist in order, but now I have to play a randomized playlist.

It has been given to us that we need to set up two parallel arrays, that are also parallel to the first two (songId and typeOfSong). These must also be one dimensional. The first array will will be indexes into the songId array telling is what order to put the songs in and the second is an array of true/false values telling us if the song has already been chosen or not.

I have that:

void playRandomPlaylist (int songId[], char typeOfSong[]) {

// the size of the file and therefore arrays is known
rand() % songId[15]

// choosen and notChoosen symbolizing true and false values
typedef enum {choosen, notChoosen};
}

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C++ :: Comparing Value To Array And Outputting

Feb 6, 2013

i have 3 arrays total, 2 of them i am comparing to see if any of the values match at all, and then i am putting the value that matches into the 3rd array. currently i am trying

int isthere (int match[], int maxmatchLength,
const int vec1[], int vec1Length,
const int vec2[], int vec2Length)
{
for (i=0; i<vec1Length; i++)
if vec1[i]==vec2[i];
vec1[i] = match[i];
}

But this will just match the same values are in the same spot. how do i fix it so that it compares one value in the first array to the whole second array, before going to the next number.

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C++ :: Overloading Using IStream - Not Outputting Objects

Mar 6, 2015

I'm implementing istream and ostream overloading for a program that takes in 3 objects, adds them, subtracts them, and multiplies them. I'm having difficulty in outputting the objects. The program outputs the first object just fine, but for some reason defaults the other two...

Code:

#ifndef COMPLEX_H
#define COMPLEX_H
#include <string>
Class Complex

[Code] ....

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C++ :: Sudden Exit Right After Outputting Expression

May 1, 2014

This program I'm working on just exits unexpectedly right after outputting "Expression?"

int main(void) {
provideHelpIfNecessary();
while(true){
cout << "Expression? ";

[Code] ....

And I'm not allowed to change anything in main().

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C++ :: Outputting First Word Of Each Sentence In String

Dec 20, 2014

I have been trying to get this to work for a while now - with no success.

Basically I am trying to write a function which the returns the first word of each input sentence in a single string - this is part of a larger cryptography program I am working on.

So for example, if this string was passed into the function:

"This is what I mean. Is it right? A poor puppy abandoned. Secret torturing of dogs are happening. Message: be on the watch."

It should return:

//declared in class "steganalyse"
string cyphertext;
string punctuation = ".?!;:'";
book is_first_word

[Code] .....

But this only returns the first word:

This

Any other way to return the first word of each sentence in a string.

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C++ :: Input Data From File / Write Data To File

Mar 8, 2013

Ben has been administering a MBTI personality test. Now he has all the responses, but the task of scoring and compiling results seems daunting. The personality test* is a series of 70 questions for which the available responses are ‘A’ and ‘B’. Based upon the answers to the 70 questions, a personality profile is determined, categorizing the degree to which the responses place the person on four scales:

Extrovert vs. Introvert (E/I)
Sensation vs. iNtuition (S/N)
Thinking vs. Feeling (T/F)
Judging vs. Perceiving (J/P).

Each of the 70 questions relates to one of the four scales, with an ‘A’ response indicating the first of the corresponding pair (E, S, T, or J) and a ‘B’ indicating the second (I, N, F, or P). For instance, an ‘A’ response on the question: At a party do you:

A. Interact with many, including strangers
B. Interact with a few, known to you indicates an Extrovert rather than an Introvert; just the opposite for a ‘B’.

For this test, each question is designed to influence one of the four scales as follows:
questions 1, 8, 15, 22, 29 … are used to determine E/I,
questions 2, 9, 16, 23, 30 … and 3, 10, 17, 24, 31 … to determine S/N,
questions 4, 11, 18, 25, 32 … and 5, 12, 19, 26, 33 … to determine T/F, and
questions 6, 13, 20, 27, 34 … and 7, 14, 21, 28, 35 … to determine J/P.
Notice these come in sequences of “every 7th” question.

The goal of the test is to determine which end of each of the four scales a person leans, and to thus classify him/her based on those leanings (e.g., as ENFJ, INTJ, etc.). Since Ben would also like an indication of how strongly the test taker fell into each of the four, the program should print the percentage of ‘A’ responses for that scale.

Input for this program should come from a file responses.txt. The first line of the file will contain a single integer, n, indicating the number of test results to follow. Each of the following n lines will contain the first name of the test taker, a single blank, his/her last name, a single blank, then the 70 responses he/she gave on the test. Although the test instructions indicate that the results are most valid when all questions are answered, sometimes respondents leave questions blank. In that case, a dash appears at the corresponding place in the list of responses.

Output for the program should be written to the file types.txt. It should include a well-formatted report listing, for each test taker, his/her name, the percentage of ‘A’ responses in each scale, and the resulting personality type. A tie within a scale should result in a dash (‘-‘) for that part of the personality type.

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C++ :: Stream Data To A File And Then Return To File To Add Further Data?

Aug 23, 2012

I am trying to stream data to a file, and then return to the file to add further data. When I add data the second time, I then want to update the value of the second byte in the whole file. I can't seem to do this!

Here is my sample code:

Code:
int a = 1;
int b = 2;
int c = 3;
int d = 4;
int e = 5;
int f = 6;
int g = 7;
int x;
fstream out1("file.dat", ios::out | ios::binary | ios::trunc);

[code]....

The output I get is "1, 2, 3, 4, 5, 6", but I want to be getting "1, 7, 3, 4, 5, 6", because in "out2", I seekp to the second integar entry, and change it to "7".

I have also tried using ios::ate in the constructor for "out2", but this gives me the out put "4, 7, 6, 6, 6, 6", which is suggesting that when I create my fstream object "in", any seekg commands are relative to the beginning of the "out2" stream, rather than the "out1" stream.

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C++ ::  Program To Grade T Or F Test Not Outputting Information

Jul 2, 2014

I wrote a program to grade T or F test. It is running, but not outputting the information.

Code:

#include<iostream>
#include<string>
#include<fstream>
#include<iomanip>
using namespace std;
double grading(char*answer, char* stuResponse, double graded);

[Code] ...

text doc:

TFFTFFTTTTFFTFTFTFTT
ABC5403 TFTFTFTT TFTFTFFTTFT
ABC5404 TFTFFTTFFTFFFTTTFTFT

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C++ :: Outputting Contents Of Stack On Input Line?

Sep 3, 2013

outputting the contents of my stack on the input line.

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C/C++ :: Vector Of Class Outputting Garbage Values

Jun 21, 2014

I have a class that uses std::vector. I push back class objects onto the vector but when I try to cout the data members (with get functions) I get garbage values.

Here is the class:

#ifndef JOBS_H
#define JOBS_H
#include <iostream>
#include <iomanip>
#include <vector>
#include <string>
using namespace std;
class Jobs{

[Code] ....

I know I am missing the implementation of several functions but I'm just testing my vector to see if it is working and it isn't. The getBlockValue() function should output 0 for each job. When I push back one object the output is 0. When I push back 2 objects the output is 0. However when I push back 3 objects I get random values. Why is this? I thought vectors were dynamic?

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C :: Store Data In Binary File Then Use It To Find Inverse Of Matrix Form Of Data

Dec 6, 2013

I need to find inverse of a matrix data in binary file should be used to form matrix.its not finding inverse correctly rest is working good.

Code:
#include <stdio.h>
void createbin();
void display();
void inverse();
int main()
{
createbin();
display();
inverse();

[Code] ....

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C++ :: Data Input Into A Text File While Not Deleting Original Data

Apr 19, 2013

I want to input data into text file while not deleting the original data in the file and I use something as

ofstream writefile;
writefile.open("example1.txt");
if (writefile.is_open()) {
for(j=0; j<N; j++) {

[Code] ....

But this will delete the original data.

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C/C++ :: Display Data From File Into 2D Array - Print Closest Bmi From Data

Mar 28, 2015

#include <iostream>
#include <fstream>
using namespace std;
int main() {
int r = 0;
int c = 0;
int num[17][15] = { 0 };
[Code] ...

// Here is my code for displaying the data from the text file into a 2d array and height next to it, but I am not able to diaplay the height from 60 to 76 next to the row of the 2d array, as shown in the table below. This is my program:

Recently the health authorities have listed a new way to calculate the body mass index (BMI) of an individual.
Values of 20 – 24 are classified as normal, 25-29 as overweight, and 30-34 as heavy.

The table below is a portion of a typical BMI table.

BMI:202122232425262728293031323334
Height:
60102108113118123128133138143149154159164169174
61106111116122127132138143148153159164169175180
.
.
.

MY task is to write a program that does the following things:

1.Produce the table by reading in the data from bmi.txt (on Moodle) into a 2-D array.

2. Display the table neatly on the screen, with row and column headings. The BMI should go from 20 to 34. The height should go from 60 to 76 inches.

3. Prompt the use for their height (in inches) and their weight.

4. Make the program print the closest BMI.

If their weight is lower than the values on the table, use 20 as the BMI.
If their weight is higher than the values on the table, use 34 as the BMI.

5.Loop the program so the user can find more BMI’s.

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Visual C++ :: Finding Value In Data File Closest To Calculated Data?

Jan 11, 2014

I'm reading from a file the middle column of data (Volts) where my test file "AP.txt" is opened by my program. Here is a segment of the data:

time Volts dV
49552 -66.20183 -0.01556807
49553 -67.76025 -0.01556495
49554 -69.30704 -0.01533247
49555 -70.81799 -0.0148486
49556 -72.26774 -0.0141133
49557 -73.63226 -0.01315276
49558 -74.89141 -0.01201764

Since the calculation I performed gives me -71.77 Volts, I need to match this value to the time that this occurs closest to using my program, and output the time that this occurs at.

Here is my program so far:
int main()
{
std::ifstream inFile;
inFile.open("AP.txt");
ofstream results_file ("maxvaluewithinput.txt");
float TimeAtdVMax = 0;
float VoltsAtdVmax = 0;

[Code]...

If you're curious, this program isn't for homework. It's part of the independent learning on C++ I'm doing for a Master's Thesis; the program will eventually model the APD90 of a ventricular action potential.

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