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General C++ Programming - January 2016 (Page 2)

HOW TO READ AND DISPLAY A SPECIFIC STRING FROM TEXT FILE AND DISPLAY TO SCREEN.

i would like this code to search through the textfile for data a user will specify at runtime. Then display to screen whether the string was found from the text...

[1 reply] : Hi, Please use code tags: http://www.cplusplus.com/articles/z13hAqk... (by TheIdeasMan)

by samarth123

string problem

#include<iostream> #include<string> using namespace std; int main() { string s; cin>>s; int l=s.length(); int count=0; for(int i=0;i<l;i+3) ...

[2 replies] Last: Your for loop is wrong. for(int i=0;i<l;i+3) I guess you want to in... (by Thomas1965)

by devonrevenge

Is there significantly more overhead repeatedly launching a thread than just having one running constantly?

I'm not looking for high performance as I am managing lots of TCP socket connections and not a UDP thing, however I don't want to make any clearly bad practice ...

[9 replies] Last: I forgot just how fun you guys were. (by devonrevenge)

by closed account zv05oG1T

Matrix generator for a specific determinant

I tried to generate a matrix with the code below. It works, but it has some isues. One of them is that for a matrix NxN, the code generates random elements, but...

[10 replies] Last: Yeah, not a good idea... I really need det(M)=1 or -1. If you still w... (by closed account zv05oG1T)

by rabster

Getline function error

Maybe it's just me but for some reason when input the size of the string array I can really only input the size I inputted - 1. For instance, If i make my strin...

[2 replies] Last: Holy crap I never even knew that. Dang you got some good knowledge and... (by rabster)

by TheSocket

Char to int (MinGW)

I don't know if it matters but I'm using MinGW compiler. I have created a GUI program using Win32 API and have come very far. What I just need to know to be abl...

[18 replies] Last: Solved! Guys the problem was sooooooooo simple and I wasted hours. The... (by TheSocket)

by johnny221

How to do this?

I have to solve the following problem in C++ and I have no idea how to do this... "A parent process sends an array of numbers to another process (son). The s...

[1 reply] : What are you having a problem with, the GUI or the prime numbers? For ... (by pnoid)

by benkitt

Divide operand

To anyone who may know how to help; I have a line of c++ code that was giving me a wrong answer when it ran, it gave an answer of 0. The code as written was...

[2 replies] Last: I think I understand now and where else I may have issues... thanks (by benkitt)

by misterhup

Images in graphics.h

I am trying to display an image and it seems that readimagefile doesn't work... I am not sure why. Could you give an example of a c++ code example in which read...

[5 replies] Last: What IDE and compiler are you using OP? (by Computergeek01)

by demon6552

so, is there an easier way to create maps for say, a pac-man clone than hard coding rectangles?

Im not even asking for pseudo code or anything, just a concept. I thought pac man would be a good project because it is simple (even the AI i have an idea for, ...

[3 replies] Last: there are other objects, such as the dots and the sprites themselves.... (by helios)

by AmmmG 01

Movement of Knight in Chess!

Hi everyone, So in chess, the knight moves in a very special way: either: two squares forward and one to the side or : one square forward and two to the side...

[11 replies] Last: Yes, apologies, I studied English long time ago in the US.... ☺ I di... (by AmmmG 01)

by alex067

Writing object into binary file

I have an object declared as such: #include <iostream> #include <fstream> #include <string> using namespace std; class NodeType { private: int v...

[10 replies] Last: Either approach could be made to work but writing only the attributes ... (by Computergeek01)

by AmmmG 01

Possible movement of Knight in Chess.

I have to do a program where the user is asked to enter the 2D position of the Knight on the Chess board and then the program is asked to show all the possible...

[1 reply] : #include <iostream> constexpr int N = 8 ; // board size using board_... (by JLBorges)

by craigmanson

Opinions on coding of Parallelism in C++

Hey All I'm working on some exciting new Parallelism tooling for C++ with the University of St Andrews in Scotland. We gave a presentation on this at the Edin...

[2 replies] Last: In the tool we're creating we are building upon and extending these me... (by craigmanson)

by lilaii

Shared memory with services

Hi, I have two applications, one 32 bits and one 64 bits talking through a dll which I made in 32 and 64 bits and use shared memory. It communicates perfectly...

[no replies]

by vivienneanthony

Quick Dirty Command Line Parser Isn't working

Hi, I made a quick command line but not sure why it's not working? It seems the for loop is wrong. The code results in this. $ ./AlphaToolbox --makegame...

[1 reply] : The first argument (0) is always the executable (and path). So start t... (by coder777)

by SuperManVsIronMan

! File handling in C++ !

Please tell me what this line do-> while (f1.read((char*) this ,sizeof(park))); Please tell what's the use of WHILE and THIS in this statement....

[1 reply] : this : http://www.learncpp.com/cpp-tutorial/8-8-the-hidden-this-poin... (by coder777)

by SuperManVsIronMan

Why to write int(in_time.ti_hour) ?

cout<<"Park-in time: "<<int(in_time.ti_hour)<<":"<<int(in_time.ti_min)<<":"<<int(in_time.ti_sec); Why I have to write int(in_tie.ti_hour) can't I just wr...

[2 replies] Last: Is ti_hour a char type ( char , unsigned char or signed char )? The... (by Peter87)

by mike9407

Pointer can become array ?

Example if i write int* a; a =5;can ?

[2 replies] Last: You can use array syntax with pointers. a is the same as *(a + 1... (by Peter87)

by StoriesOfRen

Help!! Debugging issue

Can I get a set of fresh eye on this bit of code... the getline function is not letting me do the user input for the search. do I have it set up wrong? Pleas...

[2 replies] Last: You just need to include a line before the getline function is called ... (by Stalker)

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