49,765 Topics
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| | #include <iostream> #include <vector> using namespace std; template< typename T > using matrix = vector< vector<T> > ; I saw this code snippet while searching for templates. I was wondering why there's a word "using". What is it for? Thanks :) |
| | Hello my name is Leonard E. Norwood Jr. I haven't been back much but I'm still studying and practicing C++ I'm still doing arrays starting from beginning to better get used it it. Anyway, it's a simple program of finding the largest number of the 10 numbers. I know my …  |
| | Hi, In the code below I have 2 nested loops, with the inner loop starts from the index of the outer loop till the end. You can think of it as I am trying to find ll the combinations. So if we have 'm' rows, we will have m(m+1)/2 possible … |
| | I don't really have an explanation and whoever thought that this new posting format was the way to go... idk what to say. I really don't like it. I can only post so much lines of code before something happens to the window and I can't scroll all the way …  |
| | #include <iostream.h> void main() { int d; int i=0,n,j,b[100]; cout<<"\n Press 1 for Decimal to Binary converstion"; cout<<"\n press 2 for Decimal to Octal converstion "; cout<<"\n press 3 for Decimal to Hexadecimal converstion"; cout<<"\n\nEnter your choice: "; cin>>d; switch(d) { case 1: cout<<"\nEnter decimal number: "; cin>>n; while (n>0) …  |
| | Hi everyone I'm having a problem with this program giving me the wrong output. The question is • void getScore() should ask the user for a test score, store it in a reference parameter variable. This function should be called by the main once for of the six scores to … |
| | #include <conio.h> #include <iostream> using namespace std; int main() { int A[10][10],m,n,x,y,sum=0; //Create a Matrix cout << "Enter number of rows and columns in Matrix A : \n"; cin>>n>>m; cout << "Enter elements of Matrix A : \n"; for(x=1;x<n+1;++x) for(y=1;y<m+1;++y) cin>>A[x][y]; //Find sum of each row for(x=1;x<n+1;++x) { A[x][m+1]=0; for(y=1;y<m+1;++y) … |
| | I'm not sure what I'm doing wrong. I get a warning when I compile and an error after my program runs. This is the warning I get: myList2.cpp: In function ‘int main()’: myList2.cpp:96: warning: deleting array ‘int score [6]’ And this is what shows after my program runs: a.out(7023) malloc: … |
| | Hello, I am currently building a rendering engine in native C++ using Direct3D 10 and the Win32 API. The engine will have 2 separate windows, one being the rendering window and the other being a control window which is used to load models, animaitons, etc. It is also used to … |
 | The difference between using refrences(&var), and pointers(*var) is that using refrences is more efficent because you do not have to derefernce the object. Am I right, and if I am why use pointers then? Take this code for example: #include<iostream> //function prototype void rFunc(int &rNum); void pFunc(int *rNum); //main method …  |
| | I've hook a game that uses OpenGL and I'm trying to draw text on the window but when drawn, it has a background that I do not want. Currently i'm using: void glPrint(HDC DC, COLORREF Colour, int X, int Y, const char* format, ...) { if (format == NULL) return; … |
| | Ok, i'm trying to create vertex normals for each vertex. I'm fairly sure i've got the math right, I'm just having trouble finding out to which faces a point belongs... The points are store in: `vector <texTri> texvert` texTri contains, x, y, z, nx, ny, nz, u, v; I identify … |
| | I'm writing a program that searches for particular sequences of bytes in a USB stick. The problem is that I don't know how to search effectively. ReadFile() allows me to buffer 512 bytes each time. If my sequence is fully present in that block, then there is no problem. But … |
 | #include <iostream> #include<string> using namespace std; int main() { string admin_pwd="testing"; string encrypted ; string unencrypted; char key[5] = "abcd"; for (int x=0; x < admin_pwd.size(); x++){ encrypted += admin_pwd[x] ^ key[x/100%30]; } cout << "Encrypted = " << encrypted<<endl; for (int x = 0; x < admin_pwd.size(); x++){ unencrypted … |
| | Im pretty new to coding in C++ and Im a student at devry unversity. I have to sort this class by credit hours in ascending order and Im having some trouble. If anyone could help it would be greatly appreciated. #include <iostream> #include <string> #include <vector> #include <algorithm> using namespace …  |
| | So... I'm looking into learning Assembly. I downloaded the FASM assembler and I want to know how useful is assembly? I want the opinion from Cpp programmers because assembly programmers always tell me it's the best language -__- Also quick question: How do I know which register to put stuff …  |
| | I'm doing a project that require the user to type in the phonetic sounds for example, "th". then the program will play a wave file that produce th sounds. As there are many different wave files for a phonetic sounds, i decided to group them into separate files, which means … |
| | Hey guys, I created a Student class in a header file and it works just fine. The problem is I'm trying to store the Student objects into a map in main which made the compiler generate a "in file included from ..." error. I'm having trouble fixing this problem as … |
 | Alright, I need a program that has both a selection structure and a repetition structure. Would someone please tell me if I am doing this right. My code gives me the correct output but do I have a selection and repetition structure? #include <iostream> using namespace std; int main () … |
| | In C++ you have this: std::string = "Name"; You can also read file with it, unlike reading the contents into a char[] with a limited amount of memory. So whats is C equivalent of a C++ string? |
| | I am trying to figure out how to create a C++ program that has a Subtotal and a Grandtotal. Could someone please help start a program? It has to have a selection and repetition structure in it. |
| | From what I've heard to be able to play two or more sounds at the same time, the sounds must be loaded in to multiple threads.On the documentation for PlaySound() I haven't seen anything about this, can some one tell me how to do that.  |
| | Hello, Over the past couple of days, I've been struggling with getting collision detection to work for my game, a 2D sidescrolling platformer, made with SFML 2. This is example code using my most recent method of collision detection, although it has some flaws: // main.h #ifndef MAIN_H #define MAIN_H … |
| | Hello! After I compile and run my program a windows error message shows up, it doesn't give some specific information it's just a standard windows xp error that asks me to send report. It gives me the error because in my code I have some basic math like this: int … |
 | Hello All! I am a little confused about the memory allocated for an executable. Now, say for example, this is my code: int foo = 1; int main() { const char* bar = "hello world"; int num; return 0; } Now, the "hello world" part would be stored in the … |
| | How can I get SetConsoleTextAttribute to work with my Console? I tried everything. First I redirected the cout and cin buffers so that my console can have input and output. But now it doesn't have Colour :S I used: HANDLE OutputHandle = GetStdHandle(STD_OUTPUT_HANDLE); SetConsoleTextAttribute(OutputHandle, 10); I don't think GetStdHandle is … |
| | What would be the possible reason why my code display two reasults whenever i search for a record that is in the second row or higher, first it display the first records and then it display the record i am searching. example output: ->Enter ISBN : A200 then the output … |
| | Hello, I want to convert a WORD type to a string, I have this code: FileTimeToSystemTime(&fdFile.ftLastWriteTime, &SysTime); String numday = SysTime.wDay; But i says that operation connot be done because it's a WORD what I wan to insert to a String. And my question is, is there any function/way to …  |
| | How can I create PNG Files from an array of bytes or read a PNG file to create an array of bytes? I looked up the format but it looks nothing like a bitmap and I read the GDI doesn't support PNG's. So how does LibPNG do it then? I … |
 | Hello 'am working in qt creator but have problem running my code. It compiles alright but never executes. And also gives the following message at the output pane 'exited at code -1073741819' Please help me out |
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