C++ :: Input / Output Text File Manipulation Not Working

Mar 24, 2013

Why my output screen for this program does not want to stay open. It only opens for a split of a second and it's gone. The program is supposed to take numbers from a input file and display and save the manipulation in the output file. Here is the program.

Code:
#include<iostream>
#include<fstream>
#include<iomanip>
usingnamespace std;

[Code] ....

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C++ :: Output From Data File Not Working?

Feb 27, 2014

i need my code to stop outputting all the numbers throughout the steps it is going through i just need it to output the total

this is my input
M
C
C
C
L
I
V

and its output is

Your total is 1000
Your total is 1100
Your total is 1200
Your total is 1300
your total is 1350
Your total is 1351

i just need it to output the last number

// write a program to read a string of characters
// that represent a Roman numberal and then convert
// to Arabic form ( an integer
// input from data file

[Code].....

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C++ :: Fprintf Not Working - Unable To Take Text From A File

Jan 11, 2015

I am trying to take text from a file and have it displayed using fprintf at line 46. When I run the below code nothing prints out. My text file has 4 lines with 5 different strings separated by whitespace.

#include <cstdlib>
#include <vector>
#include <cstring>
#include <stdlib.h>
#include <errno.h>
#include <stdio.h>
using namespace std;
//declare my own struct

[Code]...

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C++ :: Code For Displaying Text File Not Working

Dec 6, 2013

i have turbo c++ 3.0 installed . my program is compiled without error and is running. but when i choose option to display scores in the consol , it hangs . check my code. i have to run this on same compiler. i just want to display all the contenets of text file .

#include<iostream.h>
#include<conio.h>
#include<stdio.h>

[Code].....

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C++ :: Multiple Of CSV File Used As Input / Extracting Data To A Output File - Getline Function

Jun 4, 2013

I 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?

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C :: Program To Calculate Students Grades From Input File And Write To Output File

Aug 29, 2014

One of my class assignments is to create a program that receive a .txt file containing a students name and their grades as follows:

John K. 99, 87, 57, 89, 90, 95
Amanda B. Jones 100, 88, 76, 99, 86, 92
etc..

The number of students is unknown until run time. You have to take those grades and average them weighing the first (4) at 10% a piece and the last (2) at 30% each.

Then return an output file with the students name and their letter grade A,B,C,D,F based on their computed score. In addition, on screen it needs to display the average scores for each Q1, Q2, etc. as well as the minimum and maximum for each test on the screen. I am having a hard time in assigning the scores to a variable so that they can then be computed as an average and then used to determine a letter grade. I have begun to write the code and am a bit stuck..here's what I have so far:

Code:

#include <stdio.h>
#include <stdlib.h>
#include <math.h>

[Code]....

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C :: Output Does Not Print On Text File

Jul 19, 2013

In this program I can not print the typed value in the file. The file creation well done but it is an empty file

I press Ctrl +z for EOF

Code:
#include<stdio.h>
int main(void){
FILE *fp;
char ch;
fp=fopen(" Test.txt","w");
printf(" Enter the TEXT

[Code] .....

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C :: Computing Grades From Input File And Writing To Output File

Aug 31, 2014

One of my class assignments is to create a program that receive a .txt file containing a students name and their grades as follows: John K. 99, 87, 57, 89, 90, 95 Amanda B. Jones 100, 88, 76, 99, 86, 92 etc.. The number of students is unknown until run time. You have to take those grades and average them weighing the first (4) at 10% a piece and the next (2) at 15% each and the final at 30%. Then return an output file with the students name and their letter grade A,B,C,D,F based on their computed score. In addition, on screen it needs to display the average scores for each Q1, Q2, etc. as well as the minimum and maximum for each test on the screen. I am having a hard time in assigning the scores to a variable so that they can then be computed as an average and then used to determine a letter grade. I have begun to write the code and am a bit stuck..here's what I have so far:

Code:
//
// main.c
// Final Exam
//

[Code].....

The problem I'm having now is how to go about passing the grades to the function computeGrade and then compute the average and return that to the function.

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C++ :: Decompress Input File And Write Results Into Output File?

Jul 8, 2013

how do i decompress an input file and write the results into an output file?

also my do while loop is supposed to keep going unless the user selects the option to exit the program, instead it exits after finishing ay of the options.

here's my code so far...

#include <iostream>
#include <iomanip>
#include <fstream>

[Code]....

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C++ :: Getting A Large String Vector For File Content Manipulation?

Dec 10, 2013

I need a large string vector for file content manipulation.

v1.max_size() gives me 153 391 689.

But if I make a test by looping a vector pushing back strings it crashes around 16 - 26 000 000 though I still have a lot of ram (1GB left).

How come and why isn't vector size limited by ram instead?

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C :: Naming Output File Based On Input File Name

Sep 7, 2013

I have a program where I will read in a certain .txt file, such as "financial_data.txt" and I will be doing some sorting with this data.

I want my program to write out the sorted data to an output file and I want the name of the output file to be based off of the input name. For example, since my input file is "financial_data.txt", I want the output file name to be "financial_data_out.txt".

I am having a hard time finding examples online and in my reference manuals...

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C++ :: Remove Comments From Input File And Then Put It Into Output File

Mar 11, 2013

I have written this code to remove the comments from an input file and then put it into an output file. The program compiles and runs but it removes the whole line of code when it encounters a /* */ type comment. I believe the problem is in the while loop but I just don't know where.

#include <iostream>
#include <fstream>
#include <string>
using namespace std;
int main(void) {
string infile, outfile;
ifstream source;
ofstream target;

[Code]...

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Mar 25, 2013

I have code that reads an input file and generates an output file .For reading the input file we have a xml file.If there is an error while reading or writing the output file the an errored file is generated. But in the errrored file the fields are not coming as in accordance with the reader xml . They are coming randomly . In the module for reading and writing the errored file list is being used . What should be done to write in the errored file as the reader xml fields.

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C++ :: Read Input File (XML) And Generate Output File

Mar 25, 2013

I have code that reads an input file and generates an output file .For reading the input file we have a xml file.If there is an error while reading or writing the output file the an errored file is generated. But in the errrored file the fields are not coming as in accordance with the reader xml .they are coming randomly . In the module for reading and writing the errored file list is being used . What should be done to write in the errored file as the reader xml fields.

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C++ :: Program Won't Output Any Information To Text File

May 6, 2013

my program wont output any information to the text file that I have specified it just creates it but it leaves it blank

#include <iostream>
#include<string>
#include<iomanip>
#include <fstream>
using namespace std;
class Carloan

[code]....

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C++ :: Output Unusual Format For Text File

Jul 24, 2013

Bit of a problem, I'm trying to output the data from my code into a particular format to a text file. The format is

y0 y1 y2 y3 y4 y5...yn
z0 0.01 0.2 1
z1 0.4 0 etc...
z2
z3
z4
z5
...
zn

Any pointers?

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C++ :: Writing Output Of While Loop To Text File?

Jul 30, 2014

[URL] when I try to write my output to a file. I am building a life insurance premium calculator with c++. What my calculator does is read in a text file called "policies.txt" containing a number of different policies. For example:

Pol1 M N 20 100000 1 .04 99
Pol2 F S 30 100000 1 .05 99
Pol3 M S 72 750000 1 .03 99
Pol4 F N 45 1000000 1 .05 99

And using this, it creates a single premium. Once the calculator calculates the premium of each policy, I want it to write out the premium amount of each policy to a textfile called "output.txt". The problem is that when I check my "output.txt" file, only the premium for the last policy shows up. It only reads:

Premium for Pol4 is 220384
When I want it to read:

Premium for Pol1 is 14101.6
Premium for Pol2 is 14221.2
Premium for Pol3 is 582391
Premium for Pol4 is 220384

How come only the last policy is showing up? and is there any way to make all four policies appear in my output text file? Here is my code:

double ratesmn[86] = {
#include "MaleNonSmoker.txt"
- 1
};

[Code]....

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C++ :: Getting 2 Decimal Places In Output Text File?

Jul 30, 2014

how I can make my output only have 2 decimal places because I want it to be a monetary value. In my code I used this:

cout.setf(ios::fixed);
cout.setf(ios::showpoint);
cout.precision(2);

which worked well at first because on my command prompt screen the numbers had two decimal places and looked liked this:

Premium for Pol1 is $14101.62
Premium for Pol2 is $14221.16
Premium for Pol3 is $582390.50
Premium for Pol4 is $220384.49

However, I also have the program outputting to a textfile called "output.txt" and when I opened this text file the numbers only had one or no decimal places.

Premium for Pol1 is $14101.6
Premium for Pol2 is $14221.2
Premium for Pol3 is $582391
Premium for Pol4 is $220384

How come the code for two decimal places is working for my output to command prompt but not my output to the text file?

Here is my code.

double ratesmn[86] = {
#include "MaleNonSmoker.txt"
- 1
};

[Code].....

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C/C++ :: Read Text File And Display It In Output

Apr 7, 2014

I'm supposed to read a text file and display it in the output. I have it down except my formatting. I just cannot get it to just skip one line rather than multiple. I know why though because my char has a max of 11 and if I put a character lets say mango, it is going to fill in the rest with white spaces. It's supposed to display like this:

Mango
Strawberry
Grapes

But instead I get something like this

Mango

Melon

Grapes

I am using isspace but it's not working.

//source code

#include <iostream>
#include <iomanip>
#include <cstdlib>
#include <cmath>
#include <fstream>
using namespace std;
class CFile

[Code] ....

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C++ :: How To Output Void Function On A Text File

Feb 12, 2013

So I am writing this code that analyzes a file called "analysis.txt" and prints out in an ouput file (called "report.txt") the results of the analysis, i.e.,(the frequency of all alphabet letters present in the file).

I am having trouble with outputing on the file2.

here is what I have:

Code:

#include<iostream>
#include<fstream>
using namespace std;
ifstream file1;

[Code]....

I tried to lose the "<<" after the file 2, but it's still giving me an error. how to output a void function on a text file?

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C++ :: File Input And Output Structure

Jul 17, 2013

How to structure the input of one .dat file and outputting into another one. I have to loop through a file structured "doe, john, 1500", check for errors and then increase the mp by 50. You also have to do this through using a person class too. I think I need to use a while loop to go to eof and use getline to input correctly, but im not sure how to structure it.

Data file:
Horowitz,Jake,1200.24
Flabitz,Bubba,1712.38
Blackwell,Sharon,1872.93
Molerat,Rufus,501.00
Goodall,Jane,1567.43
Sommerset,William,1359.57

[Code] ......

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Sep 15, 2013

I'm trying to write a simple program that will prompt for a string typed in by keyboard and save it to a file. I've tried lots of variations and this is just the latest version.

//Prompt for a string input by keyboard and save it to a file

#include<iostream>
#include<fstream>
#include <string
using namespace std;

[Code] .....

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Feb 24, 2013

I am a math teacher who is taking a programming class. My district wants to incorporate some programming tasks into the high school math curricula. I am working on a project to calculate a final grade and output this along with a comment to a text file. The following data is the input that I created:

3 300 100 100 100 .15
4 400 100 98 94 92 .45
3 300 98 100 92 .40

The final grade output results in gibberish.

#include <iostream>
#include <fstream> // For file I/O
#include <string>
#include <iomanip>
#include <cmath>

using namespace std;

[Code] ....

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Apr 19, 2015

So far I have managed to sort songs by their string length in main. The void function is there because i learned how to create it, but it's not being used because I dont know how to use it.

Expanding on main, how would I go about selecting a random song from the array?

#include <fstream>
#include <iomanip>
#include <iostream>
#include <string>
using namespace std;
struct Song {
string song;

[code]....

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Feb 10, 2014

So I am trying to create a program that reads a series of files and creates a graph plotting points from the file. So far my code looks a little something like this -

include <iostream>
include "ccc_x11.h"
include "ccc_shap.h"
include "ccc_win.h"
include <fstream>
using namespace std ;
int ccc_win_main() {
cwin.coord(-10, -10, 10, 10);

[Code] ....

However when I run the program nothing happens. I think it has to do with the way I set up my files, which looks a little something like this-

-9 -9 -9 -9 -9 -9 -7 -7 -6 -6 -5 -5 -4 6 3 1 -1 -3 -6 5 -5 4 -4 2 -2 0

The first thirteen numbers are the x values of the points, and the last thirteen are the y values of the points. Is there any other way to have my program read the file and display the given points?? I would use getline() however that would make my point into a string, and I dont really know how to convert a string to a double before putting the variable into a point.

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Jun 12, 2013

int main()
{
string line;
int i,ch;

[Code].....

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