2,827 Posted Topics
 | Re: Traffic Light [QUOTE=Techboy52;580498]It compiles just need the buttons to turn the red,green, and yellow light on and off[/QUOTE] This doesn't compile for me. [code=JAVA] import java.awt.*; import javax.swing.*; import javax.swing.border.*; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; public class TrafficLight extends JPanel { public TrafficLight() { JButton btn1 = new JButton("Green"); JButton btn2 = new …  |
| | Someone a few months ago told me that I had to change a bunch of code from stuff like this... // config_options.h // define _FOO if and only if you want option foo to be available #ifndef _FOO #define _FOO #endif // main.cpp #include "config_options.h" #ifdef _FOO void foo() { … |
| | What happened to "In the case of deleting an account, we simply cannot honor the request and still adhere to anti-spam laws."? Did they change the law? http://www.daniweb.com/community-center/daniweb-community-feedback/threads/121348/how-do-i-delete-my-daniweb-account  |
| | The error as far as the compiler is concerned is straightforward. The function wants four parameters. You give it none. There are deeper problems though. What is getSales supposed to do? You have a return statement on line 6. Hence lines 7, 8, and 9 will never execute. What do … |
| | Re: BattleShip Game I guess that if coordinate (3,4) is on a ship, then piecesBoard[3][4] is 'O'. Otherwise it is '#' (i.e. '#' represents water)? Is that correct? Than later, I type in (3,4) and piecesBoard[3][4] is 'O', then board[3][4] is turned into a '%' and I have scored a hit? Is that … |
| | If the change to itemamount are expcted to be retained after the function returns, it needs to be passed by reference. Lines 13 and on - Will j ever not be indexMax + 1? If it's indexMax + 1, it's greater than 0. Hence the test on line 14 is … |
| | I haven't done it in quite a while, but my recollection is that you can bypass setting up Server Side Includes and CGI extensions in Apache files, which can be a real pain for people like me who aren't very knowledgable in that, and still have the ability to execute … |
| | If these are NULL terminated character strings, it seems like your Show function would be a SINGLE loop, not a double, and would display one name at a time, not one character at a time, and each iteration of the loop would contain a newline. char Show(char List[MAX_ROWS][MAX_NAME_LENGTH], int NumUsed) … |
| | > C has no references C does not have ifstream either. Perhaps the desired conversion is to a `FILE*`? One should not assume that though. The OP needs to clarify the goal.  |
| | Seems to me that this won't work in either C++ or Java due to Algorithm problems. Take i = 2 for example. That's prime, but according to your code it isn't. n is set as 0 before the j loop. The j loop from 2 to (i-1). In this case, … |
| | You can test a lot of these by writing programs and trying them out. You list the question and give your answer, but not your rationale. For example... > Suppose a method is declared as: > > public static void f (double d, int n) { > ....; > } … |
| | The formatting makes it impossible to read. You have at least one bracket matching error, very hard to see due to the bad formatting. Format, fix the bracket matching errors, and try again. |
 | [QUOTE=GrimJack;1097407]You know what it means to 'shoot your cuffs'[/QUOTE] You know what it means to "wind a watch". [QUOTE=firstPerson;1097794]when you say, "back in my day...". -------------------------------------------------------- Just for curiosity, whats the age group here in Daniweb? Anyone want to tell their age? I'm 19.[/QUOTE] I'm 39. I'm just starting to …  |
| | > if(*sen!='a' || *sen!='A' This is always true, yes? *sen can't equal both 'a' and 'A', so it must NOT EQUAL at least one of them. Since you have multiple tests with the || operator, if any of them are true, the statement is true. Hence that if statement will … |
| | > If they enter an invalid entry (not a y or n) I want to go back to the main menu. You want them to go back to the main menu if they enter an invalid entry OR if they enter a 'Y'(that was the original question, after all). > … |
| | Stringstreams are a method of HOW to do something. I'm confused about what precisely you are trying to do. You're creating a program to compute definite integrals. You have a program that apparently works. I'm with you so far. You feel it's "limited" and want to improve it. Understood to … |
| | I'm trying to createa function that takes command line arguments, parses them, and returns a stream to be used for output. If a filename is specified, the program will write to that file. If no filename is specified, the default output will be to cout. I haven't gotten to the … |
 | So many jobs are landed through connections. You apparently know a lot of dumb, spoiled, rich teenagers who are presumably the offspring of dumb, older, rich company owners and apparently the Finance Minister Of Canada. You wouldn't be the first person to land a job by impressing someone ignorant with … |
| | Get rid of the types in the function call (i.e. int, double). Also get rid of the array brackets. Those go in the function definition, not the function call. Line 33 should look more like this. Note the lack of types and the lack of brackets. rc = readHousehold(inFile, idhouseholdArray, … |
 | Not sure where precisely you are printing this string, but it appears to be outside of the Problem5 function. I see a printf statement inside of Problem5, but clearly you are having problems outside of your Print5 function (i.e. the funky character after "This is the source string". Line 37 …  |
| | Whenever you mix getline and cin, these kinds of problems show up. You say you've revised the code, but it sounds like you still have at least a few of the same types of problems? They sound like the mixing getline and cin problem. See this thread. http://www.daniweb.com/software-development/cpp/threads/90228/flushing-the-input-stream cin leaves … |
| | If you have compiled this, clearly it won't compile. You need to report the errors. "returtn" is misspelled. Why bother having a sum AND a total variable. Just use one. They mean the same thing.  |
| | Re: Using two arrays Lines 8 to 11, 21, and 27. You are creating arrays of size 0, then attempting to store information in those arrays of size 0, hence overflowing the array. If you don't get an actual seg fault, you can expect other problems. Seems like lines 9 and 11 shouldbe moved … |
| | Lines 20 and 21. You have two strings named s with different scopes. You have read a line from the file and stuck that line into one of them in line 20, then you have placed "Hello, World" into the other one in line 21, then on lines 22 and … |
| | You're missing a few brackets, parentheses, etc. Try this. Same code basically, but I added what is missing. #include <cstdio> int main() { int NumArray[] = {2 ,67 ,23 ,5 ,7 ,34 ,14 ,4 ,8 , 62}; int ArrayNum[10]; float SquareNumArray[10]; int oddNum[10]; int i,j, count, cOdd, cEven,max,min; max = … |
| | private static int Level = 7; private static int Passengers = 10; static int cPassengers = 3; static int cfloor = 3; I see a bunch of static variables that seem like they should be non-static members of the Elevator class. Why create objects if all you do is manipulate … |
 | Every other YouTube video I see involves someone taking a movie scene and adding their own music. It's pretty rare that the new music improves things. I'm wondering if people now simply need music with everything and the movie / TV producers are simply giving people what they want (loud … |
| | More details needed. Doesn't run how? 1) Won't compile? 2) Compiles but does not run to completion? If so, how far does it get? How often does it crash? Where does it crash? 3) Runs but gives bad results? If so, what are the correct results, what are the actual … |
 | Toggle button is good. I want the preview, I just don't want the "live/realtime" preview, or I at least want to be able to turn it on and off. |
| | #include <iostream> #include <cstdlib> #include <stdio.h> #include <time.h> #include <stdlib.h> #include <iomanip> // so to use strcmp #include <cstring> #include <fstream> using namespace std; int main() { fstream myfile ("savefile.txt", ios::app | ios::in | ios::out); char stringsaveT[90]; string question; if (myfile.is_open()) { cout << "This is a .txt file save …  |
| | I've been studying up on virtual destructors and how they work and I wrote this little program. I've been adding and removing the word "virtual" on lines 9, 16, and 23 to see what happens. #include <iostream> using namespace std; class a { public: a(){cout << "a::a()" << endl;} virtual … |
| | I'm not sure the OP is the best one to determine the best / accepted answer, particularly since quite often they are newbies and therefore could get bad advice that "solved" the problem, be grateful for it, and hence upvote a bad post thinking it was good. Only someone more …  |
| | Line 15. Your ios flags don't make a lot of sense. In particular "ios::app" and "ios::trunc" being used together seems to cause the problem. Delete one or the other. I can't think of any reason you'd want them both. Look at these flags and the descriptions, figure out what you … |
 | If n, the number of trials is, say, 50,000, you would be randomly generating anumber from 0 to 9, inclusive, 50,000 times, so the hits[] array should sum to 50,000. With ten elements in the hits[] array, the expected value for each element would be 50,000 divided by 10, or … |
| | I'm getting an error that I don't understand. It's a Null Pointer Exception, but neither of my arguments in line 118 is null. According to the documentation, ImageIO.write will throw a IllegalArgumentException or an IOException, but it isn't throwing either. I'm not sure what could be null here. You can … |
| | Re: Prime Number C++ > Example is 37373 , 3 is prime 37 is prime 373 is prime 37373 is prime and 37373 is also prime. You have 37373 listed twice. You skip 3737, which is NOT a prime. If you're looking for an efficient algorithm, there's considerable math involved. If not, just go … |
| | > 1 > 1 3 > 1 2 3 > 1 2 3 7 > 1 2 3 5 7 > 1 2 3 5 7 9 > 1 2 3 5 7 7 9 Makes sense up to here > 1 2 3 6 7 7 9 > 1 … |
| | That's a broad topic with many solutions. For detailed answers, you'll need to ask a more detailed question. You already have a queue in STL, might as well use it. Now "model" and "arrival" mean many different things. Do you want to set up a random number generate with a … |
| | Please use one forum or the other for these types of posts or at least link them so people don't waste time aswering here when it's being answered over[ here](http://www.dreamincode.net/forums/topic/282685-explain-how-the-minimax-function-works-for-ai-in-a-game-of-connect-4/).  |
 | I assume this is a console program, not a graphical program, correct? It seems like you would have to ask for input every time. There is a white player and a black player. You ask the white player where he wants to place the white disk, then you place it …  |
| | Indent your code. It's impossible to read. Are you sure you aren't missing bracket(s)? Why is there are a "return 0" at the bottom of the while loop? Why does the answer "yes" have a "break" statement in it? I thought "no" was supposed to break the loop from your …  |
| | ratDen2 will be overwritten if and only if you read it in. If you don't it will remain whatever it was before you asked the user to enter an operation to simplify. The behavior is exactly as you describe. If you don't want to use the denominator of the LAST … |
| | If you want it all in one line, don't output an endl every trip through the loop. cout << i <<" "; |
 | Yes, the linker can do that. I imagine Visual C++ would create the appropriate makefile to compile and link properly. Visual C++ may or may not set things up to help you in that linking. You're going to have to stick this statement... #ifdef __cplusplus extern "C" { #endif // … |
| | This program does not crash but behaves badly due to not allocating enough space for vector z in line 21. If I comment out line 21 and instead uncomment line 23, things work well. If I comment out both lines 21 and 23, the program will crash, presumably because I … |
| | Re: Internships Nothing wrong with a smaller company. I imagine it all depends on what exactly you are doing at the company. Just because someone works at a big company doesn't mean they're necessarily doing impressive work at that company. I have never heard that stereotype before and I doubt that a …  |
| | Break line 18 into two lines. char * ccode, = new char [str.size()+1]; char * ncode = new char [str.size()+1]; You need to allocate memory for BOTH strings. I assume that you are adding 1 to make room for the NULL terminator, correct? Beyond that, ccode has the NULL terminator. …  |
| | If I understand you correctly, the ListPermutations function seems to work as desired. Youpass it "AB" and it displays "AB" and "BA", and that is what it'ssupposed to do, correct? I see the printf statement on line 27 saying that you expect the printout below to also print out "AB" … |
| | Whether it "can" or not is separate from whether it should. The compiler may allow for "void main", but this explains why it's bad. http://www.daniweb.com/software-development/cpp/threads/10221/why-not-void-main http://www.daniweb.com/software-development/cpp/threads/78955/void-main-vs-int-main and a thousand other threads. A program needs an entry point. "int main" is that entry point, so you need to provide one. |
| | Re: Cin Help cin.get() gets one character, not a string. Perhaps you want one of the other members of the "get" family. http://www.cplusplus.com/reference/iostream/istream/get/ Note than none of them return a string. I imagine you'd be better off using the regular old >> operator with cin. cin >> firstword; cin >> secondword; |
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