C# :: No Data Present For Second Item - Invalid Attempt

Oct 20, 2014

I am having an issue with the below error saying that there is no data present for the second read item (bold and underlined).

But I can see in the data that both fields have data in them. why the approver2 variable is not being populated?

Error : An unhandled exception of type 'System.InvalidOperationException' occurred in System.Data.dll

Additional information: Invalid attempt to read when no data is present.

C#
string approver = null;
string approver2 = null;
con.Open();
string Approve = "Select Approver"+
",Approver2"+
" From dbo.Tbl_Overview"+
" Where RequestID = '" + STAR.Globals.Detail + STAR.Globals.DetailNum + "'";

[Code] ....

SQL

Select Approver,Approver2 From dbo.Tbl_Overview Where RequestID = 'CR4'

Results

ApproverApprover2
User.1 User2

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C++ :: Invalid Use Of Non-static Data Member?

May 25, 2014

I am getting this error invalid use of non static data member.my code looks something like this: i have a main.cpp and 2 class files with respective .h files, say one class file is named human (so i have human.cpp and human.h) and stats (so i have stats.cpp and stats.h) in my stats.h file, i have a double array: double HumanF[10][12] with everything filled in.then in my human.h file i just have a bunch of integers. human.cpp has formulas in it that use numbers from the double array i mentioned. for example

Human::Human() {
constant (this is a double i made in human.h) = (1+Stats::HumanF[0][0]);
i (another double) = pow(constant, ylvl);
(ylvl is also an int I made in my header file)
yhp = i*137;
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Code:
void CDummyView::OnUpdateMenuItem1(CCmdUI* pCmdUI)
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[Code]....

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Mar 13, 2014

I've a big problem. I'd like to generate of all permutations of objects present on my list and i don't know how to do this. I've found a few examples, but i can't use them in my code...

#include <iostream>
#include <string>
#include <list>
#include <fstream>
#include <cstddef>
#include <cstdlib>
#include <iterator>
using namespace std;
class Item {
private:

[Code]...

Input file with objects:
3
2 0 0 4
5 0 1 5
3 0 2 6

and output should be:
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5 0 1 5
3 0 2 6

2 0 0 4
3 0 2 6
5 0 1 5

3 0 2 6
2 0 0 4
5 0 1 5
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I was 'fighting' with this for few days, and I'm so downcast.

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Code:
10 = NAND(1, 3)
11 = NAND(3, 6, 5)
15 = NAND(9, 6, 2, 8)

Problem: I have to find the word "NAND" and then find the numbers inside the brackets because they are the inputs to that NAND gate. I have written a code below but that code can detect the fixed number of inputs. I need a code which can detect any number of inputs (whether 2 inputs or more than two). But i don't understand how do i do that?

My code:

Code:
string input_str ("INPUT"), output_str ("OUTPUT"), nand_str("NAND");
while (getline( input_file, line ))
{
std::size_t guard_found = line.find(guard_str);

[Code].....

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When printed out, the names are formatted as follows:

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lname, fname: 100
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However, when I print them out this is what I get:

lastname, firstname: 90
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For some reason, for any record after the first, an extra character is added to the end. These characters are not in the file, so I was thinking that the array for some reason wasn't being filled completely, (the array is initialized to size 36 and 36 characters are read from the file using fread) so it was printing out a random character assigned to the 36th array position. Except the character never changes, (always a $ for record 2, H for record 3, l for record 4 if i remember) and I've tried reducing the array size or the number of character read and it's the string that gets altered, the random character always remains. I figure the problem must be in the print_records function (appending seems to work no problem). Anyway here is my print records and appending records code.

Code: /*
- Prints a single record stored in the file pointed to by ifp.
*/
void print_record(FILE *ifp, int record) {

[Code]......

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I tried to answer the question myself and came up with an example.

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int a;
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[code]....

why statements (*) and (**) work ? Since the object a gets destroyed, shouldn't rA be invalid ? Or this is just undefined behavior ?

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Code:
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#include <math.h>
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struct integer{
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Feb 13, 2013

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Here is my code:

Code:

#include <stdio.h>
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char *strreplace(char * string, char * sub, char * replace);
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[code]....

Here is the same code, but with execution + some syntax highlighting: Ideone.com | Online C Compiler & Debugging Tool..It works great, until it gets to grabbing whatever remains in the search string after the last found sub. The realloc throws a runtime error:

Code:

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The exercise consists on 3 procedures. We get the information from a .txt like these:

01/03/2011 A
02/03/2011 F
03/03/2011 C
04/03/2011 T
(...)

Simulating a Videoclub database where the letters stand for the type of movie (A=Action, T=Terror, C=Comedy, ...) and the dates they were rented.

a) How many movies from one specific genre have been rented more than 'n' times? The genre and the value 'n' must be entered by the user.

b) How many movies and which genres belong to a certain date? The date must be entered by the user.

c) Print a list that shows the number of times a movie from each genre has been rented.

So far this is what I've got:

Code:
#include <stdio.h>
#include <stdlib.h>
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typedef struct {
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[Code] ....

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} catch(HGL::IOException &e) {
logError(e);
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==20943== Invalid read of size 1
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[Code] .....

Generally I dislike invalid read in my code, even if they are harmless like in that case.

If I don't pass a reference, but a copy of the exception, I don't get this invalid reads, but also loose all information, because of the implicit upcasting.

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Code:

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Code:
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[Code]....

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or
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[code]....

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friend vector<float> operator...
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...
...
public:
...

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gdb

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