19,876 Topics
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| | [CODE]#include <stdlib.h> #include <iostream> #include <cstring> #include <string> /* Include directly the different headers from cppconn/ and mysql_driver.h + mysql_util.h (and mysql_connection.h). This will reduce your build time! */ #include "mysql_connection.h" #include <cppconn/driver.h> #include <cppconn/exception.h> #include <cppconn/resultset.h> #include <cppconn/statement.h> using namespace std; int main(void) { sql::Driver *driver; sql::Connection *con; sql::Statement …  |
| | hello, I am building an application where I have two integers and I have to add them or multiply. I have to use a function to add/multiply this two numbers and call it from the main. I have done this so far. [CODE] int main() { int user_choice; int num1; … |
| | Hello. I've got a homework assignment involving reading an unspecified number of numbers from a data file, storing it into a dynamically allocated array and doing various sorts and such(the output is basically a list of grades on some test that I do stuff like sort, average, give an accurate …  |
| | Hello Everybody, I have a small confusion with regards to pointers. Here is some code [CODE] int main() { int *p1 = (int*)malloc(sizeof(int)); *p1 = 10; printf("The number is %d",*(char*)p1); }[/CODE] I run the code and the O/p is 10. My question is, is there no difference in using char … |
| | I am trying to find out inorder successor of a node in a binary search tree. I read the algorithm from "Introduction to Algorithms,Cormen" and understood it. But the problem I face is that I can't find out the parent of the node when it is needed in the algorithm. … |
| | ok so for some reason its telling me my "else" has no matching "if" in line 51, i have to make it so the binary output is spaced which im pretty sure i did and has to have a separate output if the character length is more than 8 [CODE]#include<iostream> …  |
| | hi i'm using Dev c++ to compile my c code and i am facing this error.....i 'm new to this programming stuff....help me out Compiler: Default compiler Building Makefile: "C:\Dev-Cpp\project\Makefile.win" Executing make... make.exe -f "C:\Dev-Cpp\project\Makefile.win" all gcc.exe -c input.txt -o input.o -I"C:/Dev-Cpp/include" gcc.exe: input.txt: linker input file unused because linking …  |
| | i'm writing a C program in unix that take a number upto 5 and creates that amount of threads..if the use doesn't enter anything the program quits after 5 secs...and this is where i'm stuck T_T ..how do i do this ? time.h ? code of wat i've done so … |
| | Hello everyone,I'm having a problem with an exercise in C,I hope more experienced programmers will help me.I want to create a simple version of the game Tic-Tac-Toe.In my edition there will be a 3x3 matrix.The 2 players that will play the game will start to fill the matrix with the … |
| | I want to update information i previously stored on a file but cannt do. My code is[CODE]//----------------------------- //--------------------------------"s"-Structure created-------------------- struct student { char regno[20]; //----------------------Pinfo var------------------ char name[50],gender[7],dob[20],otno[20],colg[50],branch[20],hno[10]; int rno; //----------------------Einfo var------------------ char doj[10]; float teage,twage; //----------------------Painfo var----------------- char fname[20],occ[50],ladd[100],cadd[100],ftno[20]; //----------------------Payinfo var---------------- char payj[200],dues[200],smoney[200],mode[20]; //----------------------Remarks var---------------- char remark[900]; //----------------------Marks var------------------ … |
| | [CODE]i need a function that checks in two linked lists are equal thi is what i have so far bool equal(list L1 , list L2 , int (*p_cmp_f)() ){ if( L1==NULL && L2==NULL) return TRUE; else if( L1==NULL || L2==NULL) return FALSE; else if( (*p_cmp_f)(L1->data,L2->data) == -1) return FALSE; else … |
| | [CODE]#include <stdio.h> #include <stdlib.h> #include "globals.h" #include "list.h" status write_int(generic_ptr p_n)){ printf(" %d " , *(int *)p_n ) ; return OK ; } int compare_int( generic_ptr x , generic_ptr y){ if( *(int*) x < *(int *)y ) return -1 ; if( *(int*) x > *(int *)y ) return 1 ; …  |
| | (I did search for this, but didn't find exactly what I am looking for). I am working on a function that will generate a sine wave at a given frequency AND sampling rate. Something that will "fill a 10k sample buffer with a 1 kHz wave at a 44.1 kHz …  |
| | how would i go about sorting multiple items in a binary search tree.. for example if i have a list of first last and middle names and i want to sort it in a tree by last name, how would i store all three of them in each node.. should …  |
| | The CashAndCreditShop supermarket determines the retail price of a product based on the time it is expected to stay on the shelf. Any item that is expected to sell in one week or less is marked up 10%, and any item that is expected to stay on the shelf for … |
| | Need help converting from hex to binary any help is very appreciated!! [CODE]#include <string> #include <iostream> class Hex { private: //constructor std::string hexNumber; int decNumber; public: Hex(std::string hNum): hexNumber(hNum) {} Hex(int dNum): decNumber(dNum) {} ~Hex(); int toInt(); std::string toBin(); std::string toHex(); }; [/CODE] it keeps saying i need to put … |
| | Hi folks , i am working on hastable nowdays and looking ways to optimize my code . Please comment on my below observations and let me know if you have any suggestions. I have an existing implementation of chained hash table (A), which uses singly link list for chaining. typedef … |
| | Hi! I’ve been working on a project using C++ and I’m facing some difficulties. I have to write a user system consisting of two classes. One class “Account” with the parameters: Balance, password and username. Account management will contain functions for operating on the balance and for reading/writing the account … |
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| | I have so much trouble in making this thing work. This is what i supposed to do: 1.build program to make histogram 2.The program should also calculate average and median. 3.The array should come from the text file. The problem is..i can build the histogram..but i have problem to get … |
| | I usually program in java but I'm going to implement this in C but the general logic psuedo code should work I would think. these numbers represent these characters: 2-abc 3-def 4-ghi 5-jkl 6-mno 7pqrs 8-tuv 9-wxyz If I were to type in a 7 digit number say 233-7687 as … |
| | the problem message as above title. this problem cause when I perform update. When I select record and click update button. It will show the data into above textbox,combobox and picturebox. When I click save button it will pop out the message(title). Line 32 [CODE]private void btnSave_Click(object sender, EventArgs e) … |
| | Hey everyone. I am attempting to create a simple console maze generator in C++ for a school project. I've already gotten most of it down but I'm having a problem debugging the actual generation algorithm I've implemented. I've been learning C++ for the past few months now but I haven't … |
 | I dont have any idea what the problem is. But what I know is it stopped at fgets(temp, 256, stdin); when I run the program, it runs this line and then just stopped because of a segmentation fault. The silly printfs are just for me checking where it stopped exactly. … |
| | Yes, I have looked in the forums for answers and have found plenty, and am asking about what I could not find. And yes, this is homework, but I need help and my professor has not responded thus far... now on to business. Description of Goal: Make a Set Data … |
| | Im writing a code to generate invoice numbers. Im using a file now that increment to number each time but i was just wondering if there is a way to use time so that it can generate a invoice using time or date. Like the first 4 digit would give …  |
| | I need to treat a 1D-RAM buffer as a 2D array of a different type than what was declared, and have questions on different methods and what provides best performance. Questions: 1. How to set things up so I can access an element by something like "ptr[x][y]"? 2. Would any …  |
| | Hi, Currently i have requirement to i have to connect C# applicaton to DB2. I dont know much about DB2 and i dont know how to connect this and which tool i need to use for this. please suggest me how to connect this and which type of tool i …  |
| | Sir, here is the qustion:- Nestor was doing the work of his math class about three days but he is tired of make operations a lot and he should deliver his task tomorrow. His math’s teacher gives two numbers a and b. The problem consist in find the last digit … |
| | Who can help me?? [B]Microsoft Visual Studio 2008 Window Form Application C#[/B] I'm want store some data and picture in access database and display the data and picture in datagridview. when the user double click the record in datagridview. it will display data and picture into above textbox for update … |
| | Hi all, i was wandering if someone good explain to me about clr? what are some advantages or disadvantages of programming c++ with clr, what are the main differences if there are any? If I understand it right clr programming is using the .NET framework, but could someone please give … |
| | 1. Are memory adresses a certain size? I've seen some that have 6 characters after the 0x and some that have 8 after the 0x 2. A pointer like this: int *pointern does what exactly? Selects a location in the memory? Randomly? Or maybe like the first availible memory adress? … |
| | Hello Everyone, I am trying to emulate a T9 (cellphone) keyboard in C. So lets say a user types in the numbers "23", a possible word combination would be "be". In my question here, I will only write down a part of what I have assuming it only works for …  |
| | I have an assignment until next week and i don't know hot to complete it In the program in c we have to help a cat escape from a dog which has double speed. The program works as follows : the data of the program are read from the file … |
| | Hi, I tried searching but I don't know how exactly to describe my question in 2-3 words so I didn't find anything. Is it possible to do something like this?Just to get the idea... I know it doesn't work: [CODE]switch(c){ case '1':{ (...) ; break;} case '2':{ (...) ; break;} … |
| | Hi Friends, How can I create a number which will be construct with the array values. e.g. [CODE] arr[0]=2 arr[1]=5 arr[2]=8 arr[3]=4 [/CODE] now the number will be, [CODE]int num=2584[/CODE] please help me for this... Thanx...!!!  |
| | Hello, I have this assignment in C. The problem is that the functions have to be placed in separate files instead of just one. I haven't done that before. It seems code that would have run if the program was written in one file doesn't work when the functions are … |
 | Gaussian elimination is designed to solve systems of linear algebraic equations, [A][X] = [B] This program reads input from a file which is passed as an argument when calling the program. Say the matrix is in file name matrix.txt so we call the program in this way: ------------------------- gauss matrix.txt … |
| | Hi, This is just a thought. So please don't get mad at me and please don't waste much time over this either. Just wanted to share something that occurred to me. Now I've done a bit of java and a bit of C. Now what I want to do is … |
| | I need to write a program that calculates the squares of all numbers that are contained in a file of floating point numbers. The obtained new numbers form a new file. Like this : if the file contains the numbers 1, 2.5, 0.1, the numbers 1, 6.25 and 0.01 form … |
| | ..Im preparing my way on studying C# this summer for my C#programming class.. .. well of course, I need a compiler so I could try it myself.. ..I just want to ask what could be the "BEST" compiler I can use for my purpose.. .. |
 | Hello guys! :) I just wanted to ask something so that I can clear up things in my mind. What is the difference among Carriage Return ('\r'), New Line ('\n') and Line Feed? Is it correct to say that \n = \r + LF ? Thank you in advance! :) |
| | [ICODE] Hi, here you will find a program which taking some inputs calculates the sales of 5 items on daily and weekly basis. Prevously I wrote it with no function, and it was quite a very long program, 9 A4 sheets, but this is written by using a function. As … |
| | [CODE]#include <stdio.h> #include <stdlib.h> #include <conio.h> int main() { char _name[30]; int _age; printf("Hello Quester\n"); printf("What is your name ?\n"); scanf(_name); printf("...and what is your age, may i enquire esquire of peril and danger ahead\n"); scanf (_age); printf ("\nYour name is ",_name, (" \nand your age is "), _age ); … |
| | Hi, I wrote a program that inserts nodes into a linked list in descending order.But whenever I test my code with numbers 12,14,13,19,7 in this order.Whenever I entered 7 I took 7 is already in the list.But as easily seen 7 is not in the list before I inserted.After give … |
| | Can anyone please solve the following problems in C ASAP its verymuch urgent 1. C program to check whether the given graph is tree. 2. C program to check whether the Binary tree is full or complete or neither full nor complete 3. C program to extract spanning tree(without using … |
| | just a simple for loop from 2 to 4(including for with increments 0.1 and 0.01. the problem is that when the increment is 0.1, the value of cur in last loop is 3.9; wheras, when increment=0.01 it is 4(as expected). all the variables are "double". any idea or suggestion? [CODE] … |
 | I am thinking of learning C++ (I already know Python and Java), and a friend of mine is thinking of learning C# (already knows some Java and JavaScript). I know there is a long debated "C++ or C#" ordeal out there, so I am not asking about that! :) (I've … |
| | Goal: drag-and-drop from one button to another button and have access to the following info from the original button: - Image - BackColor - Tag Problem: I can only implement one. If I try to implement all three I get null pointers. [code] private void button1_MouseDown(object sender, MouseEventArgs e) { … |
| | Hi guys, Could anyone show me the best way to run a function every 10 minutes for ever? Thanks guys! |
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