I have issues for the following piece of code :
Code:
#include <string>
#include <fstream>
#include <iostream>
#include <cstdlib>
[Code] ....
I get errors retrieving the grade values extracted, and then I get a run time fault.
I have some code that will allow me to draw a crescent moon shape, and have extracted the values to excel to be drawn. However in place of some numbers, there is '-1.#IND' in place.
View 3 Replies View RelatedMy specific request is for retrieving values that are stored to a CompactFlash card. I am able to store values (we call them recipes) to the CompactFlash card as .csv file. I just haven't been able to figure out the code to retrieve this information back to the touchscreen.
Code:
// Create a new folder if it doesn't exist
CreateDirectory("/recipes");
//Create the file if it doesn't exist
CreateFile("/recipes/recipe.csv");
//open the file
hfile = OpenFile("/recipes/recipe.csv", 2);
[Code]....
Now with that said, I would like to retrieve these values from the .csv file.
I have a vc++ project file which reads data from access 2007 database.
I have successfully declared and opened connectionPtr and recordSetPtr objects.
The follwoing code is giving an error message that "item cannot be found in the collection"
stringVar = (recordSet->Fields->GetItem("[String]")->GetValue()).bstrVal;
If i replace "[String]" with "String" then above statement executed successfully.
How can i execute the above statement with "[String]" without errors?
So I made a library for a whole bunch of functions and when i compile it, it says"Unresolved external symbol_(Name of function here) referenced in function main.
View 1 Replies View RelatedThe question is to write a program to add two time objects.
Here's what I did:
#include<iostream.h>
#include<conio.h>
class Time {
public:
int hours,minutes,seconds;
[Code] .....
There's an error in sum of hours in the output.
i need to display the current time and date in my program and use variable to store each of the time values like
a = 10
b = 29
c = 31
printf(``%d : %d : %d``, a,b,c);
which then give the output as - 10:29:31
How to save the time in variables in C....
i am using C in windows 7 and my complier is Bloodshed Dev C++
I wrote program for Sequential matrix multiplication .But after execution for any input value( ex. 100,150,400) it shows the execution time is 0.000 msec.
#include <stdio.h>
#include <math.h>
#include <sys/time.h>
void print_results(char *prompt, int N, float *a);
int main(int argc, char *argv[])
[Code] ......
The code is compiled.
If I do loops for push and pop fucntions in main.cpp the same size as Stoke everything is working properly
If loops are larger than the Stack size that goes here is a picture in the console (see screen print)
Code:
//
//(---.Array_hpp---)
//
#ifndef Array_HPP// Preprocessor gates
#define Array_HPP
#include <sstream>
#include <iostream>
#include <exception>
template <class Type>//Remove the "=double" default parameter.
[code]....
I'm working through the Let us C book. One exercise asks me to collect int and float , then pass them to a function that gets product of these and returns it to main. My code looks like this:
Code:
#include <stdio.h>#include <stdlib.h>
main()
{
int a;
float b, c;
[Code]...
So while compiling i get an error about conflicting types for product. I tried to google that error but couldn't understand what's the problem. My only clue is that i can't pass int and float to a function at the same time... Could that be it?
I have the records "File attached"
My query is
from c in JOB_HISTORies join d in DEPARTMENTs on c.DEPARTMENT_ID equals d.DEPARTMENT_ID select new {d.DEPARTMENT_NAME,c.START_DATE,c.END_DATE}
How do i put the record Accounting in the same row to avoid duplication.
// Purpose: calculate total cost given the tax values
#include <iostream>
#incluse <string>
using namespace std;
int main() {
double purchasePrice, stateTaxAmt, countyTaxAmt, totalCost;
//Display purchase price
[Code] ....
I have a C# program going and want to be able to call the DLL and receive back the data requested through a pointer.Below is the DLL import within my C# code.
Code:
[DllImport("MyTest.dll")]
public static extern int ReadNetwork(Byte[] ROM_ID); Below is the code in the DLL Code: int _stdcall ReadNetwork(unsigned char* Array1)
{
ReadDevice(readBackArray);
for(i = 0; i < 20; i++)
{
Array1[i] = readBackArray[i];
}
[code]....
I've tried changing the return values in the DLL's ReadNetwork() function and that works ok, so I know I'm calling the DLL and it runs ok, but printing the result back is where I'm having the problem.
I am trying to retrieve the first three bits of a number. The code that I am using should work but it isn't giving me the correct result when trying certain numbers. Below is the code I am using:
unsigned short num1, num2 = 0;
unsigned short num = 65535// binary 111111111111111
num1 = num && 0x07;// gives me 1 but should give 7(111)
num2 = num >>3;//gives me 8191, which is correct
Why I am not getting the first three correct bits(111)?
When i execute the program it gets the right data for the first array but the scound either doesn't work at all or just gets to much data. i've tryed using getline and the "cin" for what the file would be in this case "myfile" there is also one more array that must be retrieved from the file.
#include <iostream>
#include <fstream>
#include <string>
using namespace std;
[Code].....
I was struggling the last 2 days with this C script supposing to open a list of strings (input as fopen(argv[1])and allowing to access to any element of the list. I created an array *gcm[10000] and a pointer *(*gcm_ptr[10000] = &gcm. However, when I try to list whatever n[i], it always gives me the last entry.
View 4 Replies View RelatedI have a text file config.txt which has:
"red = true"
"blue = false"
"children = 10"
I want to write a code that reads the values of these variables red, blue and children when executing the code.
I have something like this:
#include <iostream>
#include <string>
#include <fstream>
using namespace std;
int main () {
ifstream Configure;
[Code] .....
I want to read the read the values of red, blue and children in and use them when the program executes.
I'm writing a simple text adventure style program in order to practice C++. I originally used char to get whether the user wanted to go north, south etc, requiring they enter W, A, S, or D, and then I used a switch statement, rather than a bunch of else if blocks to move in the appropriate direction. Last night I started updating the code and wanted to require the user type an actual string like "go north" to move, so I'm in the process of converting it over to getline();.
The way it works is the user will input "go north", and if the string is equal to "go north" it will set a variable to 1, 2, 3, or 4, so I can keep the switch statement. The program compiles but whenever it asks for user input, it always hangs waiting for 2 separate lines of input regardless of whether or not you put a space between your command. The move function is as follows:
void movement() {
bool loop = true;
int roomNorth = 0;
int roomWest = 0;
int roomSouth = 0;
int roomEast = 0;
int dirOption;
string dir = "";
[code]....
I read that it could be an issue with getline and the new line characters, which is why I added the cin.ignore in there...so yea the code will wait for 2 separate lines of input and then always outputs "Invalid direction!" regardless of the input.
How can i make my program to accept only numerical values and gives a error notice if a character or a symbol is entered???
View 4 Replies View RelatedI want to get or view the SIM card number from the dongle (the dongle will b already connected to the computer where the SIM card will be inserted into it) but the coding should be done by C programming / Language.
View 5 Replies View RelatedI am supposed to make this phone book save to a file and then be able to retrieve it.
Code:
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
typedef struct Phonebook_Contacts
{
char FirstName[20];
char LastName[20];
char PhoneNumber[20];
} phone;
}
[code]....
Suppose your program has many concrete subtypes of Person, and each person will have their own file saved, with their type stored in that file. When reading the files to create the people again (of their proper types), what is the best method to maximize performance (and elegance by shortening the code)? Here is what I have so far.
First I used if statements, which is terrible, and now I've improved the performance logarithmically using std::map. I still suspect there is a better way, especially if there are going to be hundreds of different classes. If you want to test it, you can change the PATH constant to whatever path you want, or just leave it as an empty string, and the files will be created in the same directory as your cpp file. The part I'm trying to improve is pointed out in the comments.
struct Person {
std::string name;
Person (const std::string& newName) : name (newName) {}
virtual ~Person() = default;
};
struct Guy : Person {using Person::Person;};
struct Girl : Person {using Person::Person;};
[Code] ....
I have to store large amount of data and retrieve the same data then write into file in C++. Currently I am using vector to store and retrieve. But vector is taking more time to store and retrieve the element. Is any other best data structure to store and retrieve large amount of data in unordered way?
Example code:
int I1 = 700,I2 = 32, I3 = 16;
//declare and resize the vector size
vector< vector < vector < vector<DOUBLE> > > > vPARAM;
vPARAM.resize(I1, vector< vector < vector<DOUBLE> > >
[Code] ....
I am trying to retrieve the parameters from externally connected pendrive. I have been using WMI to achieve this but not able to separate the pendrive's parameters from the other USB devices (such as USBcamera,USBHub etc) ....
View 2 Replies View RelatedThis is a round robin execution. with gantt chart. arrival time and burst time. I think there is an error in my formula to get the right answer,i cant resolve it but my program is running. What is the code or the right formula??
#include<stdio.h>
int main(){
int i,j=0,n,time,remain,flag=0,ts;
int sum_wait=0,sum_turnaround=0,at[10],bt[10],rt[10];
int ganttP[50],ganttStartTime[50];
printf("Enter no of Processes : ");
scanf("%d",&n);
remain=n;
[Code] ....
So I'm trying to learn how to use time for time based movement and what not. I did this only knowing the command time(&variable)
time_t timer;
int I, X;
void main() {
time(&timer);
X=timer;
while(I==5) {
[Code] ......
There's probably some other better way to do it... Obviously but for now I see it as putting current time in X.
start while
take in time constantly until I is 5
constantly asking is time>X(preset time 5 seconds ahead)
if it is
display message and add one to I
Why doesn't this display my message after 5 seconds?