I need to write a class that includes a bisection and newton function. I understand how each method works, I just need to know how to write a class that passes the parameters of each function correctly. Parameters: Bisection The function you're finding the root of the starting interval (a,b) the absolute tolerance the relative...
#include<iostream> using namespace std; int main() { char arr[200]; while(1) { cin >> arr; int i = sizeof(arr); cout << "The arr input is "<< arr << " and the size of the array is "<< i << endl; } return 0; } For the input of 34, This code outputs :The arr input is 34 and the size ...
Hi, I want to write a little function's tracer. I use ptrace. I'm on ubuntu x86_64. I want to found the address of the shared library function (like printf). But i have some problem and some question about the Global Offset Table. I have the following code: size_t baseAddress = this->getBaseAddress(); Elf_Ehdr const * headerElf = sta...
Is there a way to get FxCop to analyze unmanaged C++ code? Setting the /clr flag allowed FxCop to open the .exe. It find a LOT of C++ items, but the analysis on the code is very weak. For example, the following code was skipped: int i=0; if (i=2) printf("Don't worry..everything will be okay."); I would like a tool that can catch t...
Is there a way to detect and avoid if two shared libraries both expose the same global scope symbols? We recently ran into a situation where we had libA.so that exported the SuperCoolMethod() and libB.so that also exposed the SuperCoolMethod() which would clobber the previous copy of said method. This is on Linux using g++ 4.0 and late...
Basicly this is what I have: Server:: Server (int port) { cout << "Initializing server.\n"; (...) pthread_t newthread; pthread_create(&newthread, NULL, &Server::_startListening, NULL); cout << "Exit\n"; pthread_exit(NULL); // <-- Question } void* Server::_startListening (void* param) { cout << "Start l...
Hi everyone, I was just wondering if this is expected behavior in C++. The code below runs at around 0.001 ms: for(int l=0;l<100000;l++){ int total=0; for( int i = 0; i < num_elements; i++) { total+=i; } } However if the results are written to an array, the time of execution shoots up t...
Hello, I am programming a game since 2 years ago. sometimes some memory errors (ie: a function returning junk instead of what it was supposed to return, or a crash that only happen on Linux, and never happen with GDB or Windows) happen seemly at random. That is, I try to fix it, and some months later the same errors return to haunt me. ...
I want to pass in the name of a member variable. I thought I could do this by template <typename T::*> void SetVal(T::* newval) { }; This obviously doesn't work, but hopefully gets across what I'm trying to do. I want to be able to set a certain member variable of the templated class. ...
I have always wanted to step away from windows and go completely linux, but the only thing that prevents me are the programs. The problem is that I am use to the intellisense in Visual Studio 2008. I have looked for many alternatives to a program which displays the functions as visual studio does, but none seem to have what I am looking ...
Good Day, Assume that I am writing a Python-like range in C++. It provides all the characteristics of Random Access containers(Immutable of course). A question is raised in my mind about the following situation: I have two different iterators, that point to different instances of the range container. The thing is that these two ranges ...
I'm trying to use an overloaded ">>" to scan input from a file. The problem is, I have no idea how to deal with end of file. In this case, my file is composed of a number, followed by several chars Ex: 9rl 8d 6ff istream &operator>>(istream &is, Move &move) { char c; int i = 0; c = is.get(); if (!isalnum(c)) return...
Most people seem to want to go the other way. I'm wondering if there is a fast way to convert fixed point to floating point, ideally using SSE2. Either straight C or C++ or even asm would be fine. ...
i develop an echo server with WSAEventSelect. It only allow 64 connections. What should i do. ...
How do I append a string to a char? strcat(TotalRam,str); is what i got but it does not support strings ...
Here's my code: 34 35 /** 36 ** \file position.hh 37 ** Define the example::position class. 38 */ 39 40 #ifndef BISON_POSITION_HH 41 #define BISON_POSITION_HH 42 43 #include <iostream> 44 #include <string> 45 46 namespace example 47 { 48 /// Abstract a position. 49 class p...
I am building a aync single threaded server that receives data from clients. It processes the data and then saves it to the MySQL Database. The problem is that, MySQL C API does not support non-blocking calls and asio mainly does not like blocking calls. So I am thinking something like Python Twisted's deferToThread() like semantics. I...
I'm trying to initialize a list to random integers using a for_each and a lambda function. I'm new to boost.lambda functions so I may be using this incorrectly but the following code is producing a list of the same numbers. Every time I run it the number is different but everything in the list is the same: srand(time(0)); theList.resiz...
That's the error I get when I run this code : if(mysqlpp::UseQueryResult res = conn.query(sql).use()) Whats more interesting is that the next line doesn't have any problems while(mysqlpp::Row row = res.fetch_row()) Really driving me crazy. I've even manually included result.h I tried all combos of these include result.h, mysql++...
I'm trying to use std:getline() but getting a strange runtime error: malloc: * error for object 0x10000a720: pointer being freed was not allocated * set a breakpoint in malloc_error_break to debug This is the code that produces this error: //main.cpp #include <iostream> #include <sstream> int main (int argc, char * const argv[]...