homework

Java - Creating a Compiler Help

So for my programming class we have had a project to create a virtual machine including a memory unit, cpu, Input, Output, Instruction Register, Program Counter, MAR, MDR and so on. Now we need to create a compiler using Java Code that will take a .exe file written in some txt editor and convert it to java byte code and run the code. The...

How can I match a pattern in regex that can contain anything (letters,numbers,...) but match only if it contains an underscore?

How can I match a pattern in regex that can contain anything (letters,numbers,...) but matches only if it contains an underscore? Basically I want to match bob_hello but not bobhello. ...

Time complexity for Search and Insert operation in sorted and unsorted arrays that includes duplicate values.

1-)For sorted array I have used Binary Search. We know that the worst case complexity for SEARCH operation in sorted array is O(lg N), if we use Binary Search, where N are the number of items in an array. What is the worst case complexity for the search operation in the array that includes duplicate values, using binary search?? Will it...

stack overflow problem in program

So I am currently getting a strange stack overflow exception when i try to run this program, which reads numbers from a list in a data/text file and inserts it into a binary search tree. The weird thing is that when the program works when I have a list of 4095 numbers in random order. However when i have a list of 4095 numbers in incr...

what is the problem in ATM machine program

in this prigramm when the account number is uncorrect it should display a message to write a gain but when i wrote a gain by corrrect account number always it diplay the result of first account also there is aproblem in PIN number ,the use have only three time to try if he enter wrong numbe and if enter three times wrong it should stop t...

Software Testing Tools - for java

Can someone list me 5 good softwares for "Software Testing" in java projects? I need to study 5 of them, what do you recommend? ...

Errors not printing correctly..Is this logic flow correct? c++

Example user input: PA1 9 //correct PJ1 9 //wrong, error printed "Invalid row" because it is not between A and I PA11 9 //wrong, error printer "Invalid column" because it is not between 1 and 9. The problem I am having is that it should clear the remaining input and then ask for the user to enter the "move" again, and it is not. Wh...

Knight movement.... " how to output all possible moves. "

The following is the code i wrote.. I have to write it for nXn but for easyness i tried to test it for 5X5. It does not display my output... could anybody tell me whats wrong with the following code: { #include <iostream> #include <iomanip> using namespace std; void knight ( int startx, int starty, int n, int p[][5], int used [][5], ...

clearing cin input? cin.ignore not a good way?

What's a better way to clear cin input? I thought cin.clear and cin.ignore was a good way...? code: void clearInput() { cin.clear(); cin.ignore(1000,'\n'); //cin.ignore( std::numeric_limits<streamsize>::max(), '\n' ); } My teacher gave me this reply... this is basically saying that your clearInput doesn't work ...

Prolog Program for a recordings database

I have three types of facts: album(code, artist, title, date). songs(code, songlist). musicians(code, list). Example: album(123, 'Rolling Stones', 'Beggars Banquet', 1968). songs(123, ['Sympathy for the Devil', 'Street Fighting Man']). musicians(123, [[vocals, 'Mick Jagger'], [guitar, 'Keith Richards', 'Brian Jones']]. I need t...

Binary Search Tree node removal

I've been trying to implement a delete function for a Binary Search Tree but haven't been able to get it to work in all cases. This is my latest attempt: Node* RBT::BST_remove(int c) { Node* t = get_node(c); Node* temp = t; if(t->get_left() == empty) *t = *t->get_left(); else if(t->get_right() == empty) ...

Sum of even fibonacci numbers

This is a Project Euler problem. If you don't want to see candidate solutions don't look here. Hello you all! im developping an application that will find the sum of all even terms of the fibonacci sequence. The last term of this sequence is 4,000,000 . There is something wrong in my code but I cannot find the problem since it makes se...

Linked List Sorting with Strings In C

I have a struct, with a Name and a single Node called nextName It's a Singly Linked list, and my task is to create the list, based on alphabetical order of the strings. So iff i enter Joe Zolt and Arthur i should get my list structured as Joe Than Joe Zolt Than Arthur Joe Zolt I'm having trouble implementing the correct Algorit...

Other test cases for this openFile function?

I am trying to figure out why my function to open a file is failing this autograder I submit my homework into. What type of input would fail here, I can't think of anything else? Code: bool openFile(ifstream& ins) { char fileName[256]; cout << "Enter board filename: "; cin.getline(fileName,256); cout << endl << fileName << endl;...

Moving a member of a List to the Front of the List

How would one create a method that takes an integer i, and move the member of a List<T> at index i from its current position to the front of the list? ...

array of structs in C

I'm trying to create an array of structs and also a pointer to that array. I don't know how large the array is going to be, so it should be dynamic. My struct would look something like this: typedef struct _stats_t { int hours[24]; int numPostsInHour; int days[7]; int numPostsInDay; int weeks[20]; int numPostsInWeek; int totNumLines...

Beginner problems with references to arrays in python 3.1.1

As part of the last assignment in a beginner python programing class, I have been assigned a traveling sales man problem. I settled on a recursive function to find each permutation and the sum of the distances between the destinations, however, I am have a lot of problems with references. Arrays in different instances of the Permute and ...

Hex to Decimal conversion in C

Hi All, Here is my code which is doing the conversion from hex to decimal. The hex values are stored in a unsigned char array: int liIndex ; long hexToDec ; unsigned char length[4]; for (liIndex = 0; liIndex < 4 ; liIndex++) { length[liIndex]= (unsigned char) *content; printf("\n Hex value is %.2x", length[liIn...

change permissions in C by using exec()

How can I implement chmod command on file by using exec? I would appreciate if anyone can provide me a code. ...

Incorrect logic flow? function that gets coordinates for a sudoku game

This function of mine keeps on failing an autograder, I am trying to figure out if there is a problem with its logic flow? Any thoughts? Basically, if the row is wrong, "invalid row" should be printed, and clearInput(); called, and return false. When y is wrong, "invalid column" printed, and clearInput(); called and return false. When ...