I am using c++ with sqlite3
I have a database(test.db) with a table of testTable
inside the testTable it has the following attribute
_id|randomText
I tried inserting a randomText into the database after my input but it's not inserting into the database.
my code [URL]
I'm trying to insert into the database I created, values entered by the user. But I can't find how to insert them it looks like this:
//Go for the user infos
cout << "What is your ID ? : ";
cin >> id;
cout << "What is you letter ? : ";
cin >> letter;
cout << "Your letter is "<<letter<< " and your ID is "<<id<<"
[Code] ....
I don't know how to proceed, I receive a error here for the sql2 statement
error C2296: '<<' : illegal, left operand has type 'const char [36]'
I completed the program but how insert three values without using struct???
Server Program
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <iostream>
#include <netdb.h>
#include <errno.h>
#include<map>
[Code] .....
Am using the below code to INSERT values into MSI Database (Registry table)
private void button2_Click(object sender, EventArgs e) {
String Name1 = lblDName.Name;
String Value1 = txtDName.Text;
String Name2 = lblUnisntall.Name
String Value2 = txtUninstall.Text;
[Code] ....
This code work properly, but after inserting values in MSI database.
The Value1 and value 2 are created as REG_SZ (String) but as per my requirement,
Value1, should be REG_EXPAND_SZ
Value 2, should be REG_DWORD
Need to convert them in my code and then to insert into the MSI database.
i wanted to insert Decimal Values in MySQL database, but decimal values has precision and in C# there is not option to specify precision point, the last column is size which is integer.
MySqlParameter MySqlParameterCollection.Add(string parameter Name,MySqlDBTYPE dbType,int size);
Here my Code and i get error on last Line
MySqlCommand insert = new MySqlCommand("Insert into
Plan(Plan_ID,Plan_Title,Plan_rate,Plan_Length)
values(@p_id,@p_t,@p_r,@p_l);", con);
insert.Parameters.Add("@p_id", MySqlDbType.VarChar, 10).Value = p.p_id;
insert.Parameters.Add("@p_t", MySqlDbType.VarChar, 45).Value = p.p_title;
insert.Parameters.Add("@p_r", MySqlDbType.Decimal,10,2)=p.p_rate;
Any tutorial to learn?
View 8 Replies View Relatedhow to insert a variable for the size of array and prompt user to insert the elements for the array?
View 13 Replies View RelatedI am having trouble writing an insert function for a binary tree.
Here is the structure that I have to use.
I have the print function done, the insert function is the one I am having trouble with,
Code:
typedef struct bt_{
int value;
struct bt_ *right;
struct bt_ *left;
}BST;
[Code].....
This: "The compiler may not always be able to insert the code for a function inline (such as with recursive functions or functions for which you have obtained an address), but generally, it will work."
For a function inline why wont it work for a recursive function or a function for which you have obtained an address?
Why cant the compiler still insert the inline?
It is suppose to insert items in Linked List in sorted ascending order and no duplicates are allowed.The code complies but it creates duplicates out of order.
ListRetVal CSortedList :: InsertItem(const ListItemType &newItem)
{
ListItemNode* newLNode = new ListItemNode();
newLNode->value=newItem;
newLNode->next=NULL;
[Code].....
I was studying BST and tried to make a iterative function to insert, the original recursive function is the following:
void insert(node *&tree, int value) {
if (!tree) {
tree = new node;
tree->num = value;
tree->left = tree->right = NULL;
[Code] ....
And the code that i did is (but doesn't work):
void insert(node *&tree, int value) {
if (!tree) {
tree = new node;
tree->num = value;
tree->left = tree->right = NULL;
[Code] ....
I don't see where the error is or why it doesn't work.
I am trying to implement the insert function of a binary tree. Atm when I try and insert 3 nodes, the program breaks and gives me a stack overflow error. The error points to a getter function for an identifier for the data in my node class.
void LinkedList::add(Product *myProduct) {
if (_length==0) {
_head = new Node(NULL, NULL, myProduct);
_end = _head;
_length=1;
[Code] ....
Here is my insert function, the error message is
"An unhandled exception of type 'System.NullReferenceException' occurred in SDI2.exe
Additional information: Object reference not set to an instance of an object. "
In my main I have declared an instance of product, "productToAdd = new Product(id,idPrice);" so I'm a bit confused as to what I need to include..
I am unable to implement the insert function properly, every time i run the program i just get the first value and name, I am not getting other Id's and name.
"(Header File)"
#include <iostream>
#include <string>
using namespace std;
class node{
public:
int ID;
string name;
class node *left, *right, *parent;
[Code] .....
I am unable to implement the insert function properly,every time i run the program i just get the first value and name,i am not getting other Id's and name.
Code:
"(Header File)"
#include <iostream>
#include <string>
using namespace std;
class node {
public:
int ID;
node (string StudentName, int IDNumber) {
[Code] ....
I'm trying to pass 2 arrays into a void funtion, and return values to one function.
this is the the program I'm working with, after I'm done I have to split it into 3 files, a header, a main, and a separate cpp file for the functions to live in.
#include <iostream>
using namespace std;
void processArrary(int numberCount[], int Numbers[], int intnumberSize, int numberCountSize);
int main() {
int Scores[26] = {76, 89, 150, 135, 200, 76, 12, 100, 150, 28, 178, 189, 167, 200, 175, 150, 87, 99, 129, 149, 176, 200, 87, 35, 157, 189};
int numberCount[8] = { 0 };
[code]...
The goal of this program is to separate and count the groups of numbers then output the amount of numbers in each group. Near as I can tell, everthing should work, but I'm getting all zeros to be displayed in each group.
The function is supposed to return value from the file in my main, but I am getting empty value. I am trying to get better with pointer. Right now just teaching myself.
right now the only way for this code to show value is when in put the putchar(*ps) inside my readfile function. I would like to readfile to return value and print in the main function.
Code:
#include <stdio.h>
char *readfile(char filename[]);
int main(int argc, char *argv[] ) {
[Code].....
I'm writing a function that inserts a row into a matrix and deletes the last row.
But I'm having trouble. What do I need to add to this function:
I have a program that stores values in a map>. I use the map as a dictionary so that I can look through my map if a perticular string already exists. If a string does exist, I want to put the position that I found it at (relative to my text file) in my vector. How do I do this? So far I've tried this:
void mapInsert(string aWordNoSpaces, int index){
// check if word exists in map already, but first we need an iterator object
map<string,vector<unsigned int>>::iterator it;
it = wordMap.find(aWordNoSpaces);
if(it == wordMap.end()){
wordMap.insert(pair<string,vector<unsigned int>>(aWordNoSpaces,index));
[Code]...
Also, why are the zeros showing up here (i've attached a screenshot and circled them): [URL]...
I've used qsort to extract the unique student IDs by jumping every four because there's 80 rows of data and twenty students.
I want to make sure it's all working and there's something very strange going on. If you look at my code, when it comes to initialising the structure with the unique student IDs it will happily print them after each one has been initialised inside the for loop (which suggests to me it's obviously done it) but, however, when I want to print them again outside the for loop in another for loop as a "double-check" it goes horribly wrong, presumably they're not in there at all? If you traverse the code to the bottom you'll see my comments.
Now in my for loop, j is going to be incremented 20 times which will correspond to the #define STUDENTS 20. So imagine the array of structure db[j] , the first loop will set i and j both to zero, retrieve the first unique ID and store it in the structure. Then i is incremented by four to acces the next unique ID and then j is incremented by 1 to insert this new ID in the structure.
Code:
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
[Code]....
I have a pointer to a C string that contains multiple lines of text. I need to change a few characters in the string (possibly adding 1-2 extra). At the moment my code looks like this (char **objectData is the pointer):
Code:
char temp[350];
char* end = strstr (*objectData, "word_before_data_changes");
strncpy (temp, *objectData, 39); // Copying the first 39 symbols
strncat (temp, "6-11", 4); // inputting some data
strncat (temp, end, 100); // copying the last symbols.
I don't know how many there would be. Tried sizeof(end), but this cropped off last two lines for some reason. So using 100 at the moment. This sort of works, but I think it also adds some new lines or null-terminating characters in the end or something like that, because data parser cannot parse the modified data after that.
I have a problem with entering math functions in my Bisection method algorithm program. I just don't know how can I make the function that I enter in my GUI app to go from the GUI to the loop and find the root.As far as I googled I only find codes that you need to pre-enter a function in the double/float.
For example:I have a function f(x) = x^3 - cos(x) - x - 3; and I want to enter that function trough the GUI i made in c++..So this is the main code.
#include "bisection.h"
#include "ui_bisection.h"
#include <QFile>
#include <QString>
#include <math.h>
#include <algorithm>
bisection::bisection(QWidget *parent) :
[code]....
#include<iostream>
#include<vector>
#include<map>
using namespace std;
class foo {
struct type {
int i;
string s;
}y;
[Code] ....
In the sample code
1) why can't we use union if its members have constructors
2) I am not able to insert in Map.
3) also I am not able to use object of struct type y to assign value of its members and later push_back in vector
I am getting following error
knils@knils-HP:scott_mayers$ g++ vector_of_struct.cpp
vector_of_struct.cpp: In member function ‘void foo::fun() const’:
[Code] ....
#include "stdio.h"
char t[16] = {0x8F,0x78, 0xC6, 0x12, 0xBA,0x98, 0xA2,0x16, 0x8F,0x78, 0xC6, 0x12, 0xBA, 0x98, 0xA2, 0x16} ;
char w[44];
void main(){
for(int i=0 ; i<4 ; i++){
w[i] = (t[4*i], t[4*i+1], t[4*i+2], t[4*i+3]);
printf("%0x ",w[i]);
}
}
i want to put some elements of the t array into the w array but when i do this, it prints only t[4*i+3]
i want the output to be something like this
w[0] = t[4*i], t[4*i+1], t[4*i+2], t[4*i+3] = 0x8F,0x78, 0xC6, 0x12
w[1] = 0xBA,0x98, 0xA2,0x16
and so on
For some reason, my input seems to lag one behind when inserting data. Attached, I have code that I wrote along with the example of the lag. What may be wrong with my code that is causing this to lag?
View 7 Replies View RelatedI want to use a dataset of type set which will have the type pair<char,string> or pair<string,string>. How can i insert values into the set, because i have to initialize the set and will not change the set during the program.
View 3 Replies View RelatedI am trying to convert decimal value 1 to 32 to hex value and insert it at 4th pos of char array and send it as hex value at the serial port .
My issue is it is converting to decimal to hex value but when it sends, it treat the converted hex value as char and sends it equivalent hex value.
For example
if decimal =1 then its hex = 1.
so , writebuffer[3] =1
But when we send whole writebuffer through send function, it treat this 1 as char and sends its hex value as 31. how to send its hex value.
unsigned int i=0;
char hex[3];
unsigned char hexunsigned[3];
unsigned int dec;
do {
unsigned char writebuffer[8] ={0x01, 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
[Code] ....
The send function is
void serial::send(unsigned char data[], DWORD noOfByte) {
DWORD dwBytesWrite;
WriteFile(serialHandle, data, noOfByte, &dwBytesWrite, NULL);
}