Beginners - C++ Forum - July 2010 (Page 23)

Hello everyone, For some reason this line of code will result in 0: float scrollheight = (drawheight/textheight)*drawheight; I have already confirmed that ...

[3 replies] Last: Conversion to float would occur at the equal sign. (by jsmith)

by jland68

pulling char's from an array

i need some help as to how to do this. at the end of my code i have the user enter 5 words and then i added the array end . now i need to pull the 1st and 3rd ...

[1 reply] : You can familiarize yourself with the substr function here. http://cp... (by kempofighter)

by sasigi

Character pointer and size

Hello Everyone, In have a doubt in pointer size. char *p; cout<<sizeof(p); cout<<sizeof(*p); first will print 2 second will print 1 why it s...

[3 replies] Last: I'm surprised the pointer wasn't 4 bytes myself but since the pointer ... (by kempofighter)

by yklintux

*** Quick Pointer Question ***

Hello so I have bumped into a small dilemma today. I have one example. #include <stdio.h> #include <string> #include <iostream> using namespace std...

[4 replies] Last: Those arguments I have no idea about.... Receives pointer to reference... (by yklintux)

by closed account DSvMDjzh

Save array to a text file

Alrighty, so I have a program that draws with a mouse cursor, as it draws it saves the mouse positions into an array. I need to save those coordinates into a te...

[4 replies] Last: The problem was that I didn't put in the array right when getting it i... (by closed account DSvMDjzh)

by b52

Don't understand fatal error message.

LINK : fatal error LNK1561: entry point must be defined Isn't main() the entry point? // vector assign #include <iostream> #include <vector> using...

[5 replies] Last: No problem. [quote=b52]Although VC++ Express adds a half dozen file... (by m4ster r0shi)

by lukecovack

struct input error

First I want to say thanks to all the people that helped before! I have a new problem. I am creating a text based point of sales system. The code I have so f...

[10 replies] Last: WOOT thanks a lot I got it working now!!!!! man you guys and gals are ... (by lukecovack)

by Albionion

errors with pointers

I am a beginner and I came across a problem that may be a step too big for my legs. And if it is I would be very grateful if I was told so. I defined a a cla...

[5 replies] Last: [quote=Albionion]My idea now was create a function to which I can give... (by m4ster r0shi)

by khaled mohamed hassan

searching in the file

hello every body , if we suppose that i have a file in c++ . in this file a lot of names and in front of each name its ID . my problem is how to search in the f...

[1 reply] : Model the data into a type, load the data into memory via a container ... (by moorecm)

by kokito

accessing a file from my program

I have this text document with the results of a numerical model. I need to be able to pick some of them out and write them down in a column. I think I can figur...

[2 replies] Last: That looks neat. I'll read through it and ask if I'm in trouble. Th... (by kokito)

by brazyuri86

Char type hit me

Hi everyone, I am learning C++, but I have very much dificult with type char. I write the simple program to learn, and I have use the type string because I ...

[7 replies] Last: My friend, It works very well!! Thank you! The final code is list ... (by brazyuri86)

by empror9

taylor series in c++

hello please see this picture http://img104.herosh.com/2010/07/09/457215330.jpg now my question if x = 2.3145 Q1 how much will be cosine, sine and tang...

[5 replies] Last: i know x³ is short for x*x*x 3! is short for 1*2*3 but now i don'... (by empror9)

by manasij7479

Custom order of a 2d array

class matrix { const int x; const int y; int value ; public: matrix(int ,int ); }; matrix::matrix(int a,int b) { x=a; ...

[3 replies] Last: You should read this: http://cplusplus.com/doc/tutorial/dynamic/ But ... (by Skillless)

by denilugito

Moving Pointer Variable Associated With Array var

Hi all, I'm still a beginner and could you please help me, how does indexing done within pointer variable which points to an array variable. I have a code below...

[1 reply] : You never really modify the pointers themselves. *bil = *(bil + 1)... (by hamsterman)

by r3pic

trouble with unsigned type modifier

Hey all. I'm having trouble understanding unsigned type modifier. Consider this code: 1 vector<unsigned int>numbers; 2 3 numbers.push_back(-5); 4 5 ...

[4 replies] Last: hey all I found this in The c++ prgramming language book : "The... (by r3pic)

by Christian

Begginers Questions

I've been trying to learn C++ and I can't seem to understand a lot of it. I mean I can write the code when I'm using a book to learn but I don't know how to pra...

[10 replies] Last: Maybe you should go for designing. The pay is almost the same and it'... (by AngelHoof)

by C to the UNIT

shellexecute()

Can anyone give me an example of how to use shellexecute?

[9 replies] Last: You can omit the full path to the file and have just the filename, if ... (by RyanCaywood)

by mostafa44

writing and reading a structure from/to file

iwas using reinterpret_cast<> to write and read structre but ihave found something that is really very wired when i read from the file using reinterpret_cast<>...

[2 replies] Last: thank you. and sorry for such a trivial error. (by mostafa44)

by m0j1

infinite loop with <stack> header

hi , this is my first post here . I've wrote a program that uses <stack> header and I need to use a while operation in my code . the problem is when I use stack...

[7 replies] Last: yeah , thank all u guys . all the errors was because I wanted to locat... (by m0j1)

by constantx

Prime numbers confusion

Can someone explain me the following code: int i, j; for(i=2;i<1000;i++){ for(j=2;i/j;j++){ if(!(i%j)) break; if(j>(i/j)) cout<<i<<" ...

[15 replies] Last: I suppose you could put it that way. (by Zhuge)

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Beginners - July 2010 (Page 23)