Beginners - C++ Forum - September 2013 (Page 5)

i am trying to self learn c++ from the 'documentation' part of this site, and am already stuck =( can anyone tell me why my result is 4 when it's supposed to be...

[5 replies] Last: well thank you all for the response, i really was confused because i w... (by decades)

by AhabsWhiteWhale

Calculating an approximation of sin^2⁡〖(x)〗+ cos^2⁡〖(x)〗 and determining how accurate it is.

What is wrong with my calculations of sinx & cosx? The formula to calculate the two was given and I believe I have written the code correctly, however when the ...

[3 replies] Last: You should try a simple code example for yourself, to see how integer ... (by Chervil)

by algore92

-1.#IND ???

When I use the quadratic formula to try and get the roots, it always comes out as -1.#IND. I'm guessing it's because c++ won't allow the sqrt of a negative numb...

[1 reply] : This: root_1=((-b)+ sqrt((b*b)*(-4*a*c)))/(2*a); should be: ... (by Chervil)

by Totes my goat

Help! Reading multiple lines w/ getline?

Hey y'all I am new to c++ and i needed a little help with this code. I am suppose modify my program to read an arbitrary number of lines from the console until ...

[8 replies] Last: Okay, I fixed my code but how do i go about counting the number of wor... (by Totes my goat)

by NowSee

Visual Express 2012: error LNK2001 (1,2)

Hey guys, need ur help. I updated Visual Express 2010 to 2012 because i got too much failures. Now i tried to write a small "hello world" program but i am a...

[23 replies] Last: Well done, the important thing is that your compiler works regardless ... (by Uk Marine)

by Jose94ji

Help with inititalizing a variable in a for loop

It says total rain is not initialized, but if I set it to 0 then it will be reset every time it loops around how can I fix this? #include <iostream> #inc...

[3 replies] Last: This could be moved outside the loop too: if(i==11){ cout << totalRa... (by Chervil)

by allegroBegin

Allegro 5.0.10 problem

I used to do some allegro programming a few years ago in the 4th version, I recently came back to c++ and I wanted to try my luck on a simple particle system wh...

[1 reply] : I have ended up fighting the the problem is caused by the method : ... (by allegroBegin)

by patieB

please critic my code

Below is a program that is supposed to print a customer statement after generating a 5 digit customer no , includes different functions to calculate carpet cost...

[2 replies] Last: thank you , you've given me a lot to work on (by patieB)

by belgarionriva

Caesar cypher encryption

Trying a CC encryption, but I can't figure out how to go back after reaching Z.

[8 replies] Last: When using an alphabet string, you don't actually care about the lette... (by Catfish4)

by Vanniekerk789

String Input Error

Can someone please assist with an input of a string error. Here is my code cout<< "Please enter the following information: " << endl; cout << "C...

[2 replies] Last: Thanks it worked :) (by Vanniekerk789)

by splendorman

Class problems

Hi there forums, I'm having a bit of trouble with header files and classes, I continually get the error 'undefined reference to Maths::densityb()'. I've been wo...

[2 replies] Last: Thank you so much. you, my friend, are a hero! (by splendorman)

by elfeck

Reusing dyn. allocated array

Hello, I've got a dyn. allocated array like this: int size = 10; MyClass* array = new MyClass ; Now I want to delete element at index 5 and store a ...

[5 replies] Last: I wasn't sure this wouldn't leak memory. To my knowledge, in C++ you... (by Catfish4)

by patieB

generating 5 digit numbers

Hi there Can anyone please tell me how to write a program to generate random 5 digit numbers . thank you

[12 replies] Last: I'm not too proud to admit when I'm wrong - good points :) Coming to ... (by closed account o3hC5Di1)

by jwilt

Roman Numerals

I'm writing a program that changes a new roman numeral input into base10. It must take multiple inputs and use a switch statement. It does not seem to make i...

[3 replies] Last: http://www.cplusplus.com/forum/articles/42672/ Hard if you cannot use ... (by ats15)

by Dknight

Whats wrong in this code fragment?

hello, what is the error in this code fragment? if(x==1) k=100; else k=10; thanks

[3 replies] Last: no no it is just a theory question and sorry the format written was wr... (by Dknight)

by bexeo

help with modulus

okay so i understand modulus i understand that you can only use int when working with modulus i understand that it calculates the remainder the program im ...

[4 replies] Last: giblit, you got it. thanks so much!! yeah i was about to say "i need t... (by bexeo)

by shahgee

check this code and plz help me

i have two functions here.i have declared two loops in function but i don't know how to print these loops value in another function. void houseInfo::get...

[1 reply] : just put it into a loop again and print it (by closed account Dy7SLyTq)

by yaraa

help me

write a c++ statement that defines a circle object named circle1 with radius 5 I dont understand :( explain me pleasee.

[2 replies] Last: const double RADIUS = 5; string circle1 = "circle"; cout << "The... (by bexeo)

by klimkiller

cant get the value in double pointer

Hi all, I am having problem displaying the amount in the weekly sales. While i am able to get salesperson and noOfweek to display what i have set, the code i...

[2 replies] Last: damn. didnt saw that. after making it into *amount and changing line 1... (by klimkiller)

by MasterT

How do I get the index of a value in an enum?

I know that RED has index 0 and BLUE has index 1, but how do I find that out using code? I tried using std::cout << Colors.RED; but the compiler throws an...

[3 replies] Last: Thank you! (by MasterT)

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Beginners - September 2013 (Page 5)