C++ :: Reading Values In Order In File And Assign?

Apr 12, 2014

My game is a sort of RPG with stats, money etc. I just recently added a save/load system using writing to a file. I initially got writing to a text file to work, then I got loading to work too.I eventually was able to read numbers from the file and assign them to integer variables in order.

My issue was I wanted to check if a save file existed, if it did, load it up, if it did not, go to character creation. I had a lot of trouble with this and after trying different code snippets to work I finally got it to check if a file existed, and execute the appropriate code.

My issue now is my code USED to go through each entry and assign variables in order.

Like the first number in the text file would be for the variable money, and it would read it, assign to to int money and scroll to down to the next variable for player strength, assign to to playerstr variable and so on. After making the tweak for loading it no longer functions like this, and makes the last entry in the text file the value for everything.

Here's my code:

Save Code:

{
ofstream savegame;
savegame.open("C:/Sounds/savegame.dat", ios::trunc);
savegame << money << endl;
savegame << playerstr <<endl;

[Code]....

I barely get how this code works, how can I tweak it to go through the file in order and assign variables one at a time?

At the current moment, it assigned the playerstr value to both money and playerstr int. But the save file being created lists the correct values in order.

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C/C++ :: How To Assign Values From Text File To Structure Of Arrays

Sep 5, 2014

have to do an election program in C.

There are 7 candidates and 365 votes in total. I need to do this using an array of structures. I need to read from a text file each of the names of the candidate and the number of votes they get. At the end i need to output the winner of the election.

Here is a sample of my code so far

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
struct candidates {
char name[20];
int votes;

[code]....

Here is a sample of my text file:

Robert Bloom
John Brown
Michelle Dawn
Michael Hall
Sean O’Rielly
Arthur Smith
Carl White

1 2 4 5 1 2 3 4 4 1 2 3 7 4 4 5 3 7 7 7 7 7 7 7 7 7

Each candidate gets +1 vote for their number electionCandidate[0] for each one he gets one vote and so on for the rest. 365 voters in total.

I was able to input the name for each Candidate from the text file. Now the problem is putting each vote to the corresponding candidate. Also any vote that is above 7 is a spoilt vote which i am trying to count in the above code. The code compiles but it crashes.

I am using while(!feof) but it seems that its not working or this is not the correct way.

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Jan 21, 2014

My problem is that I need to take a csv or excel file with tens of thousands of datapoints, write all points in a section of column to an array, perform calculations on them, and then write it back into another column.

I've been looking all over the internet for ways to do this easily. So far I have not found anything that I can follow and implement.Some codes have been slightly useful, but they aren't commented in a way I can understand. How to write code to take, for instance, lines from column b between 500-1000, write them to an array, and write another array 500 characters in column c. If that code could be commented, I have tried a few different techniques (counting commas), but haven't gotten anything to work.

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Oct 5, 2013

I have a .txt with a 0 or 1 to each line of the txt file. there are many values to read. I am reading the values and calculating how many each reoccur in a sequence (run-length encode). If i only use say 50 values coming in it works, but once i do the hundreds there are in the file it hangs. i am not sure why.

Code:
#include<stdio.h>
#include<string.h>
#include<stdlib.h>

FILE *infile;
FILE *outfile;

void PrintBinary(int x,int y);

[Code] ....

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Feb 13, 2015

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cust_list.h

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May 20, 2013

We are supposed to split this lab into 3 files a .h and 2 .cpp's. The code I'll be talking about is going to be directed at the main.cpp file. Basically we are supposed to be able to enter as many classes into the program and when you are done the program is supposed to save the contents into a .dat file. This lab is working off of an older lab so I already have a .dat file I am trying to test with this program by reading it into my program when I first run it I prompt if the user wants to load previously entered courses and if they reply with a 'Y' the program will load the contents of the .dat file. Problem is right now when I load from the .dat file only the first class is correct. Every other class after that is just giberish. I've tried everything but can't get the restore part working. I also cannot get the save to .dat portion of this lab working either.Here is my code:

#include "Course.h"
#include <iostream>
using std::cout;
using std::cin;
using std::endl;
using std::ios;

[code]....

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Mar 25, 2013

I am trying to read an array values from Tmin.txt file. I take array size from user viz. number of raw & column and then, read the following data from Tmin.txt file which look like this:

20 40 20 25 30
20 30 40 20 25
20 40 20 25 30
20 30 40 20 25
30 40 40 30 40

I am using getline, and then converting it to int by using atoi. But my code is not working.

Code :

// reading a text file
#include <iostream>
#include <fstream>
#include <string>
using namespace std;

[Code] ....

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Dec 1, 2013

I am trying to read hex data from a file (not just hex values in text format). I was able to read it (02 EC) with "fread" into an char before but I need to change the Hex value into an integer in decimal.

I already read about strtol but I would prefer reading the hex Value into an integer.

Here is my code so far:

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int main() {
int itrack1[1];
int itrack2[1];

[Code] ....

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I can assign values to pointer character array like this...

Code:

char *array[4]={"abc","xyz","dgf","sdt"} ;

but the case is i don't know how to assign strings through key board ???? with using gets ,getchar or other suitable function

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Dec 27, 2014

I create some code that assign values to a dynamic memory structure. I'm not sure why one code works and the other crashes when it assigns a value.

Working Code

#include <iostream>
using namespace std;
struct WorldOjectCollisionMap
{

[Code].....

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Oct 11, 2013

I am trying to read the file which has the values stored in the following pattern

2 4 10 103 2 504 .... and so on

I Have opened the file and then passed the opened file to another function to process it further.

here is my code

#include <iostream>
#include <fstream>
#include <vector>
#include <stdlib.h>

[Code].....

now the problem is when the control exits the "while loop" in the function "readingValues(std::ifstream& myFile)it goes straight to catch block ?

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Apr 4, 2014

I am attempting to read values from a file into a 2d array temp[31][2] (31 rows, 3 columns).I only want the values from the file to be read into the first two columns.I believe I am accomplishing that but when I go to print the array, I expect the first two columns to have the file data and the third column to have all zeros. The third column, however is printing such that the value is the next row/first column.

I'm not sure for instance why on the bottom loop for line 1 it doesn't print:

temp[0][0] temp[0][1] temp[0][2] 20 49 0 It instead prints: 20 49 1

Code:

#include <stdio.h> Code: #include <math.h>
FILE *inptr;
int main() {
int temp[31][2] = {0}, tempavg[31][2] = {0};
int i, j, k, sum;
inptr = fopen("ProgrammingProject14.txt", "r");

[code]....

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May 6, 2013

So I have this text file that I am trying to read from and store the values of each line in multiple variables.

Let's say my text file contains

AXSYZ3482 Tom 100 112

and my code below here works fine when the lines in the text file is separated by spaces.

while (fscanf(fp, "%s %s %d %d
", userID, name, &startLoc, &endLoc) != EOF) {
printf("%s %s %d %d
", userID, name, startLoc, endLoc);
}

But let's say my file was to look like this instead.

AXSYZ3482:Tom:100:112

But if i try this below...

while (fscanf(fp, "%s:%s:%d:%d
", userID, name, &startLoc, &endLoc) != EOF) {
printf("%s %s %d %d
", userID, name, startLoc, endLoc);
}

It seem to store the entire line in userID including the ":". I want to ignore the ":"'s and store everything in between in respective varibles in the order specified above.

So first string in userID, then ignore the :, then second string in name, and ignore the next :, and so forth. How I can accomplish this?

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Jan 28, 2014

I am trying to write a program that will open a file with 2 points, take those points, determine what quadrant those points are in, and save the result back into the same file without truncating the data.

I'm having some trouble with my file I/O. I can't get my program to read the two values for X and Y that I put in the points.txt file. It simply uses whatever random number was used last time in that block of memory. In my points.txt file I put something like "4 -5" and it wont assign those numbers to my X and Y variables. I believe the issue is on line 25

#include <iostream>
#include <fstream>
using namespace std ;
int main() {
//defining X and Y
double X, Y ;

[Code] ....

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May 20, 2014

im trying to make a statistics program and i have an array holding all the users numbers. The array has 10 elements and i was wondering how i could put these elements in order from smallest to largest.

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Mar 16, 2013

I have 2 arrays, one of doubles and other of integers, the doubles have the result of division of two numbers and the array with the ints have numbers that will refer to another array, but it is not important for this problem.

An example:
doubles array: (12,44;12,44;7,22; 12,44)
ints array: ( 4 , 2 , 3 , 1 )

now using my quicksort function i will organize the array of doubles from the higher to the lower, and the ints array will follow the order of the doubles array, the result is :

doubles array: (12,44;12,44;12,44; 7,22)
ints array: ( 4 , 2 , 1 , 1 )

Well, when i have values in the doubles array that are equal, i need to check the ints array and order the ints values, but only the ints that in the doubles array are equals, the final result will be:

doubles array: (12,44;12,44;12,44; 7,22)
ints array: ( 1 , 2 , 4 , 1 )

How i can order the ints array only between an interval that is given by the interval of numbers that are equals in the doubles array?

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Apr 20, 2014

I'd like to do a MergeSort with sentinels and order the pointers, not the values!

#include <iostream>
#include <limits>
using namespace std;
void
stampa (int *n) {
int i;
for (i = 0; i < 10; i++) {

[Code] .....

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Nov 24, 2014

I got this program to create an array of playing cards and assign the values and suits and shuffle the array. I'm at the point where I need to output the cards but I need to burn the first card by making it output "**" instead of the card. my cards[] is a constant so I can's assign the first card as such.

void showCards(const int cards[], int numCards, bool hideFirstCard) {
if (cards[0]) {
hideFirstCard=true;
cards[0] = '**';
} for(int a = 0; a <= numCards; a++) {
cout >> showCard(cards[a]);
} }

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I am trying to assign the integer value to unsigned char array. But it is not storing the integer values. It prints the ascii values. Here the code snippet

Code: uchar uc[100];
for(i=0;i<100;i++)
{
uc[i] = i;
}

The values which are stored in uc[] is ascii values.I need the integer values to be stored in uc[]. I tried to do it with sprintf. but the output is not as expected. if I print the uc[i] it should diplay the value as 0,1,2....99.

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Apr 12, 2015

Im trying to read from a file, line by line, with no specified number of values in the file. Check out my code:

int main() {
string x;
ifstream fin;
int count = 0;
char ch;
fin.open("CWC_Master.txt");
if(!fin)

[Code] .....

Now, this works great! However, its skipping some lines. And I dont know why. For example: Lets say that the input file is:

superman toy
sm2335
19.99
batman toy
bm5532
25.99
aquaman toy
am6786
26.00

Where it should output the above, instead it outputs every other one. Like:

superman toy
19.99
batman toy
25.99
aquaman toy
26.00

How can I fix my code so that it SIMPLY(i say simply because I am still a beginner coder) can read line by line?

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Jul 6, 2013

I am writing a function called swap that sorts the elements of an array in order from highest to lowest values where they descend and ascend. A particular thing about this function is that swap does NOT re-arrange elements in the array so it just uses a second array of indexes for the elements in the original array and then swap sorts the second array based on the values in the original array. A sorted version of the original array can then be produced with these sorted indexes. You can declare and initialize the original array without any user input.

For example, int arr[10] = {1, 5, 22, 14, 6, -5, 7, 9, 12, 15 };

Header of the function swap must be as shown below: void swap(int array[],int swapedIndexes [], int size, char mode) When mode is 'a', the function sorts the array in the ascending order, and when mode is 'd', the function sorts it in the descending order. int swappedIndexes[5];swap(array,swappedInde… 5, 'a');

So far I have this code that randomly generates arrays of 10 elements and I found the max and min, but I am confused on what to do about the swapping part? Also, how to make the numbers ascend or descend in numerical order?? Here is what i have done so far:

#include<ctime>
#include <iostream>
using namespace std;
int min(int [],int);
void max(int [],int , int &);
void main()
{ srand(time(0));
//1-declare

[Code] .....

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Jun 2, 2013

what I need is to get the first integer from a file and assign it to a variable and the others integers to an array. Example: Thats my file content 5 4 6 7 8 0 and that would be the code:

Code:

struct Array{
int n;
int *v;
}

[code]....

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Oct 29, 2014

I try to use passing function as argument but I'm stuck. I have two questions: First, I try to call uppercase and open .txt in tfm Second, How can I read characters from in.txt as string and assign to char content[] ?

#include <stdio.h>
void tfm( char str_filename[], void(*pf_convertion)( char content[]));
void uppercase(char content[]); //converts all letters to uppercase
int main(){
puts("-------------------------------");
printf("tfm:
");
tfm("in.txt", uppercase);

[Code] ....

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