1,118 Posted Topics
 | You need to consider the format of your input. I will presume something like [code] Avery Brown 129 Landis St. Chapel Hill, NC 01234 555-1234 Emma Green 13 Rabbit Run Rd. Chapel Hill, NC 01234 555-2933 [/code] Every four lines is a different record. So read one whole record at …  |
| | Close. Remember, 6 doesn't evenly divide 100: [inlinecode]if (((num - 100) % 6) == 0) cout << endl;[/inlinecode] Hope this helps. |
| | Re: Sgdt,lgdt,ligdt, SGDT is [B]0F 01 /0[/B]. SIDT is [B]0F 01 /1[/B] LGDT is [B]0F 01 /2[/B] LIDT is [B]0F 01 /3[/B] The /0, etc. refers to the R/M field of the ModR/M byte of the opcode. So SGDT would be coded as [B]0F 01 00[/B] followed by three or four bytes … |
| | Google "socket programming in c" Does it have to be in C? Python makes sockets trivial, whereas in C it is a messy pain. Good luck. |
| | Use [B][[i][/i]code[i][/i]][/B] tags please. First, watch your syntax. Any time you have a [color=red][B];[/B][/color] you are terminating a statement. So [inlinecode]Animal *M;= new Animal();[/inlinecode] is two separate statements: [inlinecode]Animal *M;[/inlinecode] and [inlinecode]= new Animal();[/inlinecode]. The first 'redeclares' the variable [B]M[/B]. The second is error. What you want to say is …  |
| | In C, an array variable is a pointer to the first element of the array. Hence, you can treat the variable as any other, keeping in mind that manipulating the array variable is different than manipulating the array elements. [code=C] float *reverse_it( float *a, int len ) { float x, … |
| | I'm always just a little taken aback by things like [inlinecode]getch();[/inlinecode] and [inlinecode]system( "pause" );[/inlinecode] stuck in people's code. It is non-portable and in the case of [B]getch()[/B] and [B]cin.get()[/B], leaves the input in an indeterminate state. Since the standard input is line bufferered, the most robust code would be …  |
| | It is unfortunate, but I don't think the Delphi tRichEdit class can do unicode. The [B]lines[/B] member is a [B]tStrings[/B] object, which uses the [B]string[/B] type instead of [B]wideString[/B]. I use Delphi 5.0 and I've been playing around with the rich edit control myself for the past week or so... … |
| | Re: Vesa You need to find yourself a good reference. I recommend Ferraro's [B]Programmer's Guide to the EGA and VGA Cards[/B]. It's a bit out of date but all the info you need is there. To set a bank use something like: [code] mov ax, 4F05 ; VESA function: mov bh, 0 … |
| | You haven't used [[B][/B]code[B][/B]] tags so I can't tell exactly what you were thinking when you wrote this, but your problem is with your [B]for[/B] loops and indentation. Whenever you make something, always indent to show [I]yourself[/I] which statements belong to another statement. If more than one statement is indented … |
| | One of the lovely things about C... Check line 5 of [B]changeSetting()[/B]: you've got the [b][color=red];[/color][/b] on the wrong side of the [b][color=red]}[/color][/b]. Every single statement in C must be terminated by a semi-colon. It's the little things that get you...  |
| | Re: delphi word Before go off trying to implement your own RTF parser you might want to tell us what exactly you want to do. Are you trying to simply display a form with a bulleted list? Are you trying to create a document to save to disk? Are you trying to embed … |
| | Your syntax needs help. See the [URL="http://www.parashift.com/c++-faq-lite/templates.html"]C++ FAQ Lite[/URL]. The difference between a regular class or function and a template class or function is just that you have [inlinecode]template<typename Foo>[/inlinecode] in front of it, and can use [B]Foo[/B] as a generic type instead of a specific type like [B]int[/B], or … |
 | Re: Inheritance That's because you've got it buried in the [B]Employees[/B] namespace. Use its full name: [inlinecode]Employees::TitledEmployee frank;[/inlinecode] Have fun. |
| | A linked list node always looks like this: [code=C] typedef struct tag_node { int value; struct tag_node *next; } node_t; [/code] The value itself may be any type of thing, even though in this example I used an [B]int[/B]. Also, you could have more than one value in each node. … |
 | Both should work. Personally, I prefer to use lots of parentheses to make it obvious (both to myself and to the compiler) what exactly I mean to say: [code=C++] cout << ( (grade == 'A') ? "excellent" : ( (grade == 'B') ? "very good" : ( (grade == 'c') … |
 | It looks to me like you are mixing too many types. To read a row of characters just read in a [B]string[/B] [code=Delphi] var s: string; begin writeln( 'Please enter a sentence:' ); readln( s ); ... [/code] The [B]words[/B] function should take some arguments instead of using globals: [code=Delphi] … |
 | Re: operator- The code [inlinecode]-a[/inlinecode] is a unary operator, so he isn't trying to do anything weird. The argument to your operator function should be a reference: [inlinecode]zz operator - ( zz &z )[/inlinecode] Otherwise it looks fine. |
 | An array is just an ordered list of things. So for the array to be serializable the elements of the array must be serializable. Hence, your conclusions 1 is correct. Conclusion 2 is correct for all elements in an array (not just objects). However, conclusion 3 needs a little help: … |
| | You typed "port()" but I think you meant [B]fork()[/B]. That's an OS-specific call. On Windows you have to use [B]CreateProcess()[/B]. If you are just doing homework at home, you can ssh into your school and do it over the internet, or you can download [B]Cygwin[/B] or [B]MSys[/B] to compile it … |
| | Re: adding prompts There's no reason you can't separate them. [code=C] int i; double d; char c; printf( "Please enter a number\n" ); getline( message ); d = atof( message ); printf( "Please enter an integer\n" ); getline( message ); i = atoi( message ); printf( "Please enter a character\n" ); getline( message … |
 | Yeah, listen to [B]Ancient Dragon[/B]. Sounds to me like you've got yet another bad instructor. The guy needs to go read his own textbook. Follow [B]AD[/B]'s code, but if you want to have different initializers for each object, use an array: [code=C++] int main( int argc, char *argv[] ) { … |
| | The [B]switch[/B] statement itself has an expression unconditionally modifying image[k][m], so you will have to add an [B]if[/B] statement before the switch: [code=C] if (image[k][m] != 0) switch (image[k][m] = ...) { ... } else cout << " "; [/code] You also need to watch your indentation. The [inlinecode]cout << … |
| | The best way to terminate an application is to call [inlinecode]application.terminate[/inlinecode] This prevents a lot of problems and can be called anywhere. Avoid using [B]tTimer[/B] as much as possible because it is a "heavy" object --chewing up resources and time. Hope this helps. |
| | Re: please help me Best answer is, [color=red][B]don't do that.[/B][/color] You are playing with [I]undefined behavior[/I]. For any single variable, there should be a [I]maximum[/I] of [I]one[/I] pre/post increment/decrement operator. Otherwise your results may vary: You could just as easily have gotten 1 2 3, 1 3 2, 3 1 2, 2 1 3, …  |
| | Make sure you are using a good reference when you use interrupts. Also, try to reduce the number of instructions you use. [code] ;set the video mode to CGA 80 x 25, 16-color mov ax, 0300h int 10h ;wait for a keypress mov ah, 1 int 21h ;clear the screen … |
| | Pointer syntax in C/C++ is very flexible, but likewise very confusing. You can say something like [inlinecode]int i, *pi, **ppi;[/inlinecode] but this should be read carefully as [inlinecode]int i; int* pi; int** ppi;[/inlinecode] :an integer, a pointer to an integer, and a pointer to a pointer to an integer. Yeah, … |
| | [B]part one[/B] Don't load "asteroid.bmp" from file every time you call [B]DrawBitmap()[/B]. That's a huge slowdown. Load the bitmap first, (say in [B]Game_Init()[/B]) and have [B]DrawBitmap()[/B] take a handle to the bitmap to draw instead of a filename. Don't forget to use [B]DeleteObject()[/B] before terminating to get rid of the … |
| | Since no one else has answered this... I am not familiar with using MatLab. (I presume you mean MatLab.) However, you should be aware that affine transformations are matrix multiplications applied to an affine space --that is, applied to vectors. A vector can be any dimension you want. Your transformation … |
| | Re: function issues Your []'s are in the wrong spot. Say [code] DisplayArrays( studentNames, scores ); [/code] and [code] double DisplayArrays( string studentName[], int score[] ) [/code] Hope this helps. |
| | Re: cause of error You have some serious syntax errors going there. This is my best guess as to what you mean: [code=Delphi] function Rus( mes: string ): string; var i: integer; // number of processed character begin for i := 1 to length( mes ) do case mes[i] of 'A'..'Z', 'a'..'n': mes[i] := … |
 | It is good that you are thinking in terms of separating out functions in your code. In this case, there is no compelling reason to do it either way. Each loop must iterate through the exact same sequence of numbers. If you were to use two separate loops though, you … |
| | Re: c++ graphics "Graphics" is a [B][I]huge[/I][/B] category. What kind of graphics do you want to do? Windows and buttons and scrollbars? 2D picture processing? 3D animations? Video games? ASCII art? I ask because C++ doesn't do graphics. C++ can use libraries that do graphics. Depending on what you want to do we …  |
| | You'll have to enable command extensions and use the [B]for[/B] command. Works on XP. [code] :: change to the proper directory (probably C:\Documents and Settings\) %SystemDrive% cd "%ALLUSERSPROFILE%\.." :: for each subdirectory name except "Administrator" and "All Users" do delete it for /D %%dir in (*) do ( if not … |
| | [quote="Ancient Dragon"] >>And whats the difference in malloc and calloc? calloc() calls malloc() then initializes the data to all 0s. [/quote] Please read answers given to you. And don't quote yourself... A computer program is loaded into several parts of memory. There is the code (functions and the like), data … |
| | There isn't one. GetDiskFreeSpace() is an OS-specific function. If you are looking to find free disk space in linux, google [B]statfs()[/B]. That's not a standard function anywhere, but it is a common extension to System V. It obsoletes [B]ustat()[/B], which also does the job. Hope this helps. |
| | This is actually one of the most insidious problems people learning C/C++ get. The problem is one of [B][I]type[/I][/B]. 1/2 is integer 1/2.0 is floating point So, for example, when you go to calculate the PDF you say [inlinecode]pdf=((1/2)+INV_SQRT_2PI * ...[/inlinecode] That one-half there is an [B][I]integer[/I][/B] expression, which gets … |
| | It looks like you are playing with [B]template classes[/B]. You might want to read up on templates over at [url]http://www.parashift.com/c++-faq-lite/[/url] The first problem is that there is a variable or class or function named [B]first[/B] being used somewhere in the code (lines 43, 74, 116) that either doesn't exist or … |
| | I haven't messed with VC++ for a long time, but I believe it comes with some form of [B]make[/B]. Open a command window and make sure the VC++ bin directory is in the path (the directory that has all of VC++'s exe files), and type [inlinecode]make[/inlinecode] as usual. MS and … |
| | Write the values to a file from your program. [code=C++] ofstream outs( "data.txt" ); outs << value1 << "\n" << value2 << std::endl; [/code] Choice of shell matters. Here I use [B]bash[/B] and [B]awk[/B]. [code=bash] value1=`awk 'NR==1' data.txt` value2=`awk 'NR==2' data.txt` [/code] If you want to avoid the file on … |
| | Whomever wrote this code was a little confused himself. I suggest you come up with your own solution. [B]p[/B], [B]q[/B], and [B]r[/B] are pointers to characters, not character arrays. The first while loop reverses the string in [B]s[/B][] and puts the result in [B]t[/B][] (but it forgets the null terminator). …  |
| | Indeed it is. Consider the following lecture a bonus :icon_cheesygrin: If you plan to use [B]printf[/B] you should [inlinecode]#include <cstdio>[/inlinecode] at the top of your program. Recursive functions are best avoided in languages like C++ because they don't have any form of [B]tail recursion[/B]. Basically, every time you call the … |
 | Windows executables have a flag in the header that causes that console window to appear or not. Try changing [code] int main( int argc, char **argv ) [/code] to [code] #include <windows.h> #include <shellapi.h> int WndMain() { int argc; wchar_t **argv = CommandLineToArgvW( GetCommandLine(), &argc ); [/code] Notice that by … |
| | Use the [B]ord[/B] function. [inlinecode]print ord('A')[/inlinecode] Prints the number 65 to the console. Hope this helps. |
| | Re: Question Actually it is quite vague. To my mind, the most probable meaning is that you are to write a function that takes a vector as argument, finds both the largest and smallest values in the vector, and returns (largest minus smallest). Read another way, you might have to write a … |
| | Google "mmap". Hope this helps. |
| | Er, I haven't looked entirely through everything, but you seem to have the right idea mostly. Your copy constructor [inlinecode]point::point( point &pnt )[/inlinecode] should not be setting [B]x[/B] and [B]y[/B] to zero, but rather to the same values as the [B]pnt[/B] variable's [B]x[/B] and [B]y[/B]. You also have too many … |
| | Re: C++ words Hey again [B]zandiago[/B]. Watch your syntax. [code=C++] switch (sentence[ i ]) { case 'A': case 'a': total += A; ++numChars; break; case 'C': case 'c': total += C; ++numChars; break; ... } [/code] You are correct in that if a char is not in the switch then nothing is added … |
| | Is this to be production code? I assume it is so my response might be a little more embarrassingly detailed than you would like... [B]First[/B], for your main problem. I think you are clobbering memory somewhere --I'm actually surprised your program isn't crashing. Try this: [code] filein.read((char *) read_dist, sizeof( … |
| | Actually, you've got things just about right. The problem is that you are calling [B]main()[/B] from the other functions. Don't do that. In between lines 16 and 17 add: [inlinecode] while (TRUE) { [/inlinecode] end the while statement between lines 41 and 42: [inlinecode] } [/inlinecode] Then, get rid of … |
The End.