C++ :: Debug Error When Taking A String And Casting It To Float With File Stream
May 9, 2014
Debug Error
ProjectsFinal ProjectGrItemDebugGrItem.exe
R6010 - abort() has been called
I was going over this with a friend and it seems as though getline() is not reading anything in and thus throwing the abort error. I'm not sure why this is because I've included the textfile, with the correct name of course, in both the regular file location and the debug folder. I ask for user input and the user then inputs the name of the file they want, I do some required things behind the scenes and display the results for them in a cmd window. I've included pastebin files for both my header and cpp files because it is far to large for one post I shall, however, post the full code in the comments.
Quick Code
The problem occurs on line 159. I'm assuming once this line is fixed, line 163 will have the same problem.
// Read regular price
getline(nameFile, input, '$');
vectorList[count].regPrice = stof(input.c_str());// Casts string to a float
// Read sale price
getline(nameFile, input, '#');
vectorList[count].salePrice = stof(input.c_str());
Pastebin Links : [URL] ....
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Apr 7, 2014
I am currently trying to read in a file that takes in the input in the following form.
Code:
HANK>25 BOB>31 AL>54
BILL>41 ABE>63 JEFF>50
I have tried the following solution:
Code:
#include<ifstream>
#include<iostream>
using namespace std;
struct node
{
string name;
int age;
);
int main ()
{
[code]....
The problem is a.name, it's extracting the entire string before the space character causing p.age to contain "BOB" and so on. I've tried using p.get(p.name, sizeof(p.name), '-') with '-' as the delimiter and p.getline() using a character array instead of a string. How would it be possible to only copy the string into a.name before the '>' character?
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Apr 16, 2013
So, I'm working with cocos2d-x and there's a specific function used to print true type fonts to the screen. My problem is that I want to feed a string into the function, but it only takes a string of const char (Which I don't even know what that is. AFAIK strings are a string of chars, not const chars).
Here's a definition of the function :
CCLabelTTF::create(const char *string, const char *fontname, float *fontsize);
an example of it being used
CCLabelTTF *pCoord = CCLabelTTF::create("Coordinates", "Arial", 42.0);
What I want to use
std::string coord;
//stream a constantly changing float into coord ...
CCLabelTTF *pCoord = CCLabelTTF::create(coord, "Arial", 42.0);
What happens : Error : no instance of overloaded function "...CCLabelTTF::create" matches the argument list. Argument types are (std::string, const char [6], int)
Basically, What I need to know is how would I feed a constantly updating string into the 1st argument?
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Apr 29, 2013
I wrote a program to write text contents to file stream through fputs, the file stream address was changed in the middle of writing text content to the stream (11% text content have been put into the file stream), that cause the file stream pointer can be evaluated problem and raise exception on stream validation code in fputs library function, my question is what things could go wrong to make file stream pointer changed its address to something else or a NULL pointer if the file stream have not been flushed and closed.
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Apr 30, 2014
I'm writing a small piece of code that increments through a string of numbers. For every 5 numbers a product is produced. However i'm having an issue understanding an error that keeps occurring.
#include <iostream>
#include <string>
#include <cstdlib>
[Code].....
if you look at the code i've got a string with 5 numbers 1-5 for testing. As the loop increments through the string it takes the first 5 characters and converts them to integers and then a product is returned. The issue is that instead of storing the single letter at position J its storing some combination from the string and as a result gives me a huge product. I tried debugging. I checked what the string[j] value was with a simple cout << and it returned the right number. I even returned the char value before it was converted into an integer and it was the right number.
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Jan 21, 2014
I have two puzzling issues I am dealing with.
Issue 1: I am using a stringstream object in a block of my program that needs to be visited repeatedly depending on a user's selection from a menu. I want the contents of this stringstream object to be cleared any time control gets to this part of the program. I have tried the clear and flush functions to no avail.
Issue 2: I am reading data from a source text file that would be regularly changed during the course of program run. After the program run is over, I am supposed to save the results(which is basically the source text file AND all updates) in a destination file. This destination file would then serve as the source file when next the program is run. In other words, I want a scenario where my results overwrite the original contents of the source file; implying that my source and destination files are now one, pretty much. How can I do this?
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Oct 19, 2014
Very new to programming, and I know that there must be another way on inputting a string into each array cells not by just inputting it one by one, but as a whole. My code at the meantime is: [URL]
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Aug 7, 2014
i'm implementing a templated function callback.
I get this error:
"error C2064: term does not evaluate to a function taking 1 arguments"
I'm not sure why.
Here's the code for the template function in the timer class header:
template<class T>
void TimerEvent(DateAndTime DateTime, std::function<void(T)> Callback);
Now the class body:
template<class T>
void GameTimer::TimerEvent(DateAndTime DateTime, std::function<void(T)> Callback)
{
DateAndTime time;
time.Now(false);
if (time.Compare(DateTime) == 1)
Callback(T);
}
and calling the class in the Engine:
int test1(int a)
{
}
void Main()
{
gameTime.TimerEvent<int>(gh, test1(1));
}
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Feb 18, 2013
I get this error when I'm attempting to delete an array. I'm new to dynamic arrays, and from what I have learned, arrays must be deleted after use. I plan on using this in a function later on, so deleting the array is a must.
Here's the error message: Debug Error!
HEAP CORRUPTION DETECTED: after Normal block (#154) at 0x007E55A0.
CRT detected that the application wrote to memory after the end of heap buffer.
Here's my code:
int main() {
//Declare variables
char persist = ' ';
int* primes = NULL;
int size2 = 0;
//Declare array
primes = new int[size2];
[Code] ....
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Dec 20, 2013
#include<iostream.h>
#include<conio.h>
#include<string.h>
#include<stdio.h>
class complex {
int real,imag;
[Code] .....
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Dec 8, 2014
The first call of my function works with empty vectors but fails when dimensions are introduced to the vectors.
When "uncommented, the commented out function call fails with the error above.
These links might be useful for those unfamiliar to QuantLib:
[URL]
QuantLib: GeneralLinearLeastSquares Class Reference
Code:
#include "stdafx.h"
#include "boost/multi_array.hpp"
#include <cassert>
#include <qlmathgenerallinearleastsquares.hpp>
#include <vector>
#include <list>
#include <iostream>
#include "boostlambdalambda.hpp"
[code]....
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Feb 13, 2014
Once it gets to string name = fileWrite.ReadString(); in write file it throws this exception about unable to read beyond the end of the stream.
static void Main(string[] args)
{
WriteFile();
ReadFile();
[Code]....
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Dec 13, 2014
I am trying to work on a C++ program to calculate the quadratic formula using input files and classes. I have written my class, but I am trying to find a way to take an input file with unknown number of lines of coefficients. How do I take each integer from each line and set that value as "a" and "b" and so forth, then start over on the next line?
This is what i have so far.
fstream inputfile;//users input quadratic coefficients file
ofstream outputfile;// outputs a file with solutions
int main(int argc, char *argv[])// argc is argument count, char *argv[] is array of array of characters for arguments {
string dataline;
getline(inputfile, dataline);
[code].....
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Jul 22, 2014
How can I take in a path name like "C:myfolderfile.txt" where the user enters exactly that? I've tried putting the arg into a string, then looping through the string to find the '\', but by that time it is too late as c++ considers the '' as a escape character.
Is this even possible? I've googled it and everyone just says to make the user input the path with double \ or with a /.
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Apr 2, 2014
Whenever I run my program, It should be taking this string of information:
Shampoo 10 8.75 87.50
Pen 3 2.50 7.50
Headphones 5 20.99 104.95
MacAir 1 879.23 879.23
Raspberries 6 4.99 29.94
Oranges 5 2.79 13.95
Apples 3 3.85 11.55
From one file and outputting it to another, the finished product should look like:
Shampoo 10 8.75 87.50
Pen 3 2.50 7.50
Headphones 5 20.99 104.95
MacAir 1 879.23 879.23
cheapest item = Pen
most expensive item = MacAir
total cost = 1079.18
shopper = Mary Kay
Raspberries 6 4.99 29.94
Oranges 5 2.79 13.95
Apples 3 3.85 11.55
cheapest item = Oranges
most expensive item = Raspberries
total cost = 55.44
shopper = Winnie B. The Pooh
When I run my code however, it doesn't get past shampoo and will continue to add shampoo to the total cost infinitely. How can I change the code to produce the proper information?
CODE:
#include <iostream>
#include <fstream>
#include <iomanip>
#include <float.h>
#include <sstream>
#include <string>
using namespace std;
ifstream input_file;
ofstream output_file;
[Code] ....
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Oct 17, 2013
This is my code:
#include <iostream>
#include <string>
#include <istream>
#include <sstream>
using namespace std;
int main() {
string groups[3] = {};
[Code] ....
It outputs jibberish. I can do what I need to do but I would need to declare more variables and write more cout's, isn't there a way to add these elements to a stringstream or streambuffer? My goal is to write this program and make it as comprehensive as possible but also with very few lines.
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Oct 2, 2013
I have problem with this code:
#include <windows.h>
#include <stdio.h>
#include <gdiplus.h>
#include "ScreenCap.h"
#include <wchar.h>
#include "base64.h"
#include <sstream>
using namespace Gdiplus;
int GetEncoderClsid(WCHAR *format, CLSID *pClsid) {
[Code] ....
This function return me a long series of Y ended with other chars but not the base64 string.
I think the problem is std::string encodedstring = base64_encode(buffer, dwBufferSize); but I can't figure out the problem.
The base64 function is: [URL] ....
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Sep 2, 2013
I'm reading in a data set using an ifstream, then fetching line by line to a stringstream:
std::ifstream sfile(filename);
std::string test;
std::getline(sfile, test);
std::stringstream sline(test);
(I'm not sure why I used an intermediate string; it's pretty much legacy-code at this point, which I just reuse every time. Still works, so why change it!)
The problem is I'm using two types of data sets now, and the difference is one (optional). Most data files just have an arbitrarily large number if the second must be ignored, but others have nothing.
In the normal case, I'd simply use sline >> d >> L; to extract the parameter values. However, I'm not sure how this line will behave if the second parameter is omitted. Will it read nonsense? How do I check whether or not the parameter was set or not?
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May 14, 2013
I am working on a project which is a fairly simply BAC calculator. I am attempting to grab data from a text file, which contains state abbreviation, maximum BAC before aggravated, and minimum license suspension. The text file looks like
#include <iostream>
#include <fstream>
#include <string>
#include <cmath>
#include <stdio.h>
#include <ctype.h>
#include <iomanip>
#include <algorithm>
#include <cstdlib>
#include <sstream>
using namespace std;
float MALE_RATE = 0.68, FEMALE_RATE = 0.55, LEGAL_LIMIT = 0.08;
//percent of body weight which holds alcohol
[Code] ....
The code I am struggling with is the getline and stringstream which is near the bottom.
The output I am getting is
The maximum BAC before aggrevated DUI in AL is .15
The minimum penalty in AL is 90 day suspension of license
I get that for every state I type. I know it is reading the first line, but something in my code does not allow it to read the other lines
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Oct 7, 2012
I am working on a project were I have to read line form ( PLC ) programmable logic controller generated text file with lines like this
Circuit Value Current 2.33 4.32 5.55
there could be up to 3000 lines per txt file
I am using string stream to parse the line, for the sake of good programming I which to check weather first three values are string and last three values are actually floats raise or throw an exception if they are not ....
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Jan 4, 2014
I am parsing a binary data file by casting a buffer to a struct. It seems to work really well apart from this one double which is always being accessed two bytes off, despite being in the correct place.
Code:
typedef struct InvoiceRow {
uint INVOICE_NUMBER;
...
double GROSS;
...
char VAT_NUMBER[31];
} InvoiceRow;
If I attempt to print GROSS using printf("%f", row->GROSS) I get 0.0000. However, if I change the type of GROSS to char[8] and then use the following code, I am presented with the correct number...
Code:
typedef struct example {
double d;
}
example;
example *blah = (example*)row->GROSS;
printf("%f", blah->d);
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Feb 21, 2015
In my project i have to take the string valve and convert it into float
For example
100 will be 100.00
100.0012 will be invalid
100.00 will stay as it is
99 will be 99.00
I am thinking of using stof but i m stuck on how to set the precision of 2 ....
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May 17, 2014
I have to convert my netpay which is a float to a string So if i have 356.26 it should output the sum of three hundred fifty-six and 26/100 dollars my program function works for the sum of three hundred but after that it spits out garbage.
void convertNetPay(float netPay, char *netPayString)
{
int numHuns, numTens, numOnes;
char OnesTable[9][8]={"One","Two","Three","Four","Five","Six","Seven","Eight","Nine"};
[Code].....
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Oct 22, 2013
I want a code that can convert floating/double value into string/char array(char arr[]) and also it can be run on Boreland C++ 5.02
Here I've a code but it doesn't show all the numbers. Instead, it's showing in exponential form which I don't want!!
int main() {
char* str = new char[30];
float flt = 2.4567F;
sprintf(str, "%.4g", flt );
cout<<str<<endl; //Exponential form even after 6 digits without decimal
return 0;
}
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Apr 11, 2014
I would like to convert a string variable to float.When acquiring data from text file, I use:
while( getline( ifs, temp )) {
numberOfFeatures++;
vecteur.clear();
string::size_type stTemp = temp.find(separateur);
number_descriptorEntries=0;
[code].....
the matrix that I obtain is of type vector<Vec> where Vec is a vector of strings.I want to convert each element of matrixe to a float.
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Nov 15, 2013
So I have to convert ("a499.9") into a char and a float while ignoring the a.
I have the string stored in a buffer and found how to get the char, 4. But I don't know how to get 99.9 as a float.
Here is my code so far.
#include <string>
using namespace std;
main() {
buffer = "a499.9";
[Code] ....
My output:
4
0
How to get that double out?
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