homework

simple calculator in java parser

hi, i am currently doing a java simple calculator parser, that will deal very simply with + and - operators only and numbers only and also ( and ) , i have read about http://scriptasylum.com/tutorials/infix_postfix/algorithms/postfix-evaluation/index.htm http://scriptasylum.com/tutorials/infix_postfix/algorithms/infix-postfix/index.ht...

Requirements for building an E-Ticketing Portal (Cinemas, Shows etc) using ASP.net?

I'm part of a group of students, trying to Build a E-Ticketing Gateway for a Cinema Company. We are fairly good with the basics (we've done a few portals for schools). But none of this involved any money transactions. So I decided that before jumping in I should get a few pointers from the people who've actually done this before. What ...

Rotate a 2D array in-place without using a new array - best C++ solution?

Dear Folks, One of my students asked me this kind of homework with C++ arrays. It seemed quite interesting for me, so, though I have solved this problem, I wanted to share my solution with you and know another variants and opinions. The problem is following: Problem It is given a 2D dynamic quadratic matrix (array) A(nxn). It is require...

simulate a Three-State process model (ready, running and blocked) and a simple process control block structure

program will read input and directives from a file. The input describes a time sequence of events that occur. These are the full set of events you will simulate: cpu - The processor runs for 1 time step the currently running process new - A new process is created done - The currently running process has finished wait X - T...

Compute Salary Increments

In a company, there are three categories: A,B,C. They want to give an increment. So if category C gets N% as increment. category B gets 2N% as increment and category A gets 3N% as increment. But the increment should be atleast 1% and The total updated salary should not exceed $50,000. Print the increment and the total update...

If entity x is existence-dependent on entity y then what is x said to be?

If entity x is existence-dependent on entity y then what is x said to be? a. Dominant entity b. Subordinate entity c. Primary entity d. Secondary entity What can be the right ans select? ...

Copy a single large file (>100 MB)using the manual CreateFile()

Hello all, I want to copy a single file, fairly large (+100MB) using CreateFile(), ReadFile(), and WriteFile(). My program successfully copied text file and other small file (in the range of KBs), but when I wanted to copy a 160 single .EXE file, it crashed and the debugger said "Stack overflow" ...

A question about DRAM organization

My college's lecturer gaves me an assignment and there's a question as follow A DRAM has 11 multiplexed address pin and one data input/output pin. 14-non multiplexed address pin and 4 data input/output pin Determine the organization of the DRAM I'm currently stuck on this question,I've been googling for an hour trying to know what is...

Prove that the segments formed by two internal segments to a circle crossing each other when multiplied are equal.

This is a simple math question to which I had an answer a long time ago but that doesn't come to mind immediately right now. Using the picture attached, how would I prove that a*b = c*d ...

Prime backwards in order

An emirp (prime spelled backwards) is a pime number whose reversal is also prime. Ex. 17 & 71. I have to write a program that displays the first 100 emirps. It has to display 10 numbers per line and align the numbers properly: 2 3 5 7 11 13 17 31 37 71 73 79 97 101 107 113 131 149 ...

C++: how can I write a program to read integers from a file?

When I use the code recommended in the book, I get an error. I am using NetBeans 6.8 for Mac. Here is the code: #include <iostream> #include <fstream> using namespace std; int main() { ifstream inputFile; int number; inputFile.open("MacintoshHD/Users/moshekwiat/Desktop/random.txt"); inFile >> number; cout<<endl <<number...

JDBC problem..please help, my project is due.i have no help

This is a function that returns the minimum doctor id from doctor table after accepting a string s that is a consultation field in patient table. for eg , if in the form i wrote " cardiology", then it will return the minimum doctor id relating to the that field.also a doctor is free or not is decided by its current status. by default its...

cin.get() is not getting out of loop

Hi, I am using the following code: #include <stdio.h> #include <iostream> using namespace std; int main () { char c ; c = cin.get() ; do { cout.put(c) ; c = cin.get() ; } while ( !cin.eof()) ; cout << "coming out!" << endl; return 0; } Problem with the above code is, its not getting out of l...

How can I use jUnit to test a class that uses a singleton?

I am developing a simulator for a machine. It reads a file in, stores it in a string (as a binary number) to an array that is supposed to simulate the memory of a computer. Then it gets passed to an interpreter that takes gets the first element of the array, and based on the first 4 characters it gets sent to another class. An example o...

how to move to location in graphics mode

What code do we use to move at a point on the screen in graphics mode(graphics.h)?As in normal we use goto(x,y). ...

Why is it counting the last number twice?

My program is reading numbers from a file- and it reads the last number twice. What is wrong with my program and what can I do to fix it? int main() { ifstream inputFile; int number = 0; //the input for the numbers in the file double total = 0; //the total of the numbers double counter = 0;//number of numbers doubl...

Link lists in C++ (pt. 2)

How come void del_begin() crashes when there's only one node left (I have other functions to add nodes)? #include <iostream> using namesspace std; node *start_ptr = NULL; node *current; int option = 0; void del_end() { node *temp, *temp2; temp = start_ptr; if (start_ptr == NULL) cout << "There are no nod...

Fibonacci Sequence in C

This is the expected output: We are to make a C program that calculates for the Fabonacci Sequence. We're only allowed up to 3 variables and we're NOT allowed to use loops. And I don't know what to do and how to start. I hope you guys can help me. :/ ...

removing every other character in a string using java regex

hi, i have this homework problem where i need to use regex to remove every other character in a string. in one part, i have to delete characters at index 1,3,5,.... i have done this as follows: String s = "1a2b3c4d5"; System.out.println(s.replaceAll("(.).", "$1")); this prints 12345 which is what i want. essentially i match two char...

Adverserial search troubles

Hello, I'm writing a Connect4 game with an AI opponent using adversarial search techniques and I have somewhat run into a wall. I feel that I'm not far from a solution but that there's perhaps a problem where I'm switching perspectives (as in: the perspective of which participant I'm basing my evaluation scores on), missing a minus sign...