51,593 Topics
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| | Write a function to compute the value of the following series. f(x, y) = y( ((1/1) - (1/3)) + ((1/5) - (1/7)) + ((1/9) - (1/11)) ... + (1/(4x-3) - 1/(4x-1)) ) where the values x and y are given by the user. The main function should continue to query … |
| | Hey there, all. I just complied a program in C++ on Microsoft Windows 7 Ultimate (MinGW). The only problem is that when I run it a command prompt also runs with it in the background, and can't figure out how to remove it. Any ideas? |
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| | [CODE] i am a 13 year old stuck at this, someone please help me out!! i have a problem defining a character variable its giving the error lvalue required #include <iostream.h> #include <conio.h> void main() { clrscr(); char name [20]; cin >>" Your name please...", name; if (name="john") //over here!!! …  |
| | I have a struct as follows: [CODE]struct Database { int accountNum; double balance; int months; };[/CODE] I want to make a vector of this struct, because I want the size to vary. How do I do that? Thanks in advance  |
| | I have a program that requires to reverse the name which is a string, here's the code... it's suppose to work, no errors found.... but "Run time error" [CODE] int i = fullName.length(); while (i>=0) { cout<<"Your reversed full Name is: "; cout<<fullName.substr(i-1, 1); i--; } [/CODE] thanks |
| | It's probably obvious that I'm more familiar with Python than C++... I was wondering if there's a convenient way of storing objects / miscellaneous STL structures on the hard drive for later importing and use in C++ in the same manner that Python does with the Pickle module. I know … |
| | i want to itterate through the vector and want to check if entered string is present in the string vector or not.. so please help me to know how can i do it i have done just as we do to itterate through vector<string>: vector<string>::iterator it; cout << "myvector contains:"; … |
| | I want to make an user defined STACK.But I have some problems with this following code. Please find what is worng. [CODE] #include <iostream> #include <conio.h> using namespace std; #define MAX 10 class stack { private: int arr[MAX]; int top; public: stack() { top=-1; } int m; void input() { …  |
| | Please give Free download links of Latest and Best C/C++ Compilers for Windows... |
| | Hello, Can anyone suggest a GUI library that meets the following criteria? * Cross-Platform * Doesn't control the main loop * Not 100% object-oriented; similar to Xlib :) * Not many pointers please (like FLTK that every object is a pointer) * Free to use for closed source and open …  |
| | [CODE]vector<string> file_pass; if(count == m2+1) { p2_pass = onfile.tellg(); shift = p2_pass-p1_pass; onfile.seekg(-shift,ios::cur); for(j=0;j<shift-1;j++) { onfile.get(ch); temp_pass[j] = ch; } user_pass.assign(temp_pass,temp_pass+shift-1); file_pass.push_back(temp_pass); }[/CODE] for first input asthana it is giving asthana but after push back for second input saxena it is giving saxenaa i know last a is from first … |
| | I have a asm boot on a floppy disc and i want to show a c++ kernel (cuz c++ are easy). but how can i link it? I heared somethig about : extern _main call _main for asm. Can anyone help me? :'( |
| | Hello everybody, I have got a code that read txt file. But I wounder how I can read many text file from a folder and save each one in a separate array. Help Please |
| | Hi Does any buddy help me to convert char* to std::wstring |
| | Hello Guys I am having problems with an assignment. I need to create a class to make a rectangle. Then I have to - Declare an object of the class (rect1) using the default constructor. Now prompt the user for a Width, Height and Character. Store the results in temporary … |
| | [CODE]# include <stdio.h> # include <iostream> using namespace std; int main() { int a,b,c; while (true) { cout<< " enter ur first digit"<< endl; cin>> a; cout<< "enter ur second digit" << endl; cin >> b; cout << " ur ans is "<< (a-b) <<endl; continue ; break;} scanf ("%d%",&c); … |
| | Hello there I am implementing heap sort by maintaining min heap property. It is working fine but the order is descending, I want ascending order. One way is to invert the output array and get the desired output but this is not what I want. Like in min heap root … |
| | hi guys, trying to figure out how to put X when seat is taken plz help [//Airplane Seat Assigning system. [CODE]#include<iostream> using namespace std; int main() { char seat [7][4]={}; //initalize 7 rows and 4 columns char arr[4]={'a','b','c','d'}; int i,j; int row, colnum; char col; for(i=1;i<=7;i++) { for(j=1;j<=4;j++) { //cout<<seat[i+1][j+1]; …  |
| | I wrote this string palindrome program that reads input from a text file. All the syntax are correct but I have an error I couldn't understand. Any help is appreciated, thanks!!! First, this is the error message: [B]Error 1 error LNK2001: unresolved external symbol "char * newToCheck" (?newToCheck@@3PADA)[/B] And this... … |
| | [CODE]#include <cmath> #include <iostream> using namespace std; void prime(int num) { int numPrime=true; for(int c=2;c<num;c++) { if (num % c == 0) { numPrime=false; break; } } if (numPrime == true) cout << "TRUE" << endl; else cout << "FALSE" << endl; } int main () { int n; int …  |
 | how to make a simple browser using c++ and by using <stdio.h>&<conio.h>  |
| | Hello, I'm very new at C++ and I have to write a code that uses a recursive function to reverse some characters within a boundary, so lets say I have A[1] == ‘A’ A[2] == ‘B’ A[3] == ‘C’ A[4] == ‘D’ A[5] == ‘E’ and I put in a … |
| | im writing a program for school that needs to search through a directory and find files of a certain type. if it meets up with a folder i need to search inside it and so on for all other folders found inside. i was thinking of a function to pass … |
| | I am a novice @ coding right now, and am getting it by trial and error, when i run this program after the 2nd round of input it skips some of the steps and then crashes. I threw the if (i > 0) to help bypass it on the first … |
| | Good evening folks. Im a Computing student in 2nd year of Computer Science at university. My current problem is the idea of a class within a class. I have developed a .h and.cpp file for a Date class(day, moth year), and a .h and.cpp file for a patients record. I …  |
| | What is the function of "cin.get()" and "cin.ignore()". |
| | hii to all i am very new to c++ . i am learning c++ while i try to compile this program it give error as "pair as ambiguous symbol" error. in this program iam trying to understand the how polymorphism works. #include "stdafx.h" #include <iostream> #include <conio.h> #include "mouse.hpp" using … |
| | im' confuse with this function...how do i call one function so it can be used in another function?? [ICODE]#include <iostream> #include <cmath> using namespace std; double pi=3.1416; double getinput(); double distance(double,double,double,double); double radian(double); double circumferences(double); double area(double); double diameter(double); void displayresult(double,double,double,double); int main() { double x1,x2,y1,y2; double rad,perimeter,areas,dia; cout<<"Please enter … |
| | could you please help me? i need to write a program, no dynamic allocation, using classes and arrays to multiply only 3x3 matrices only  |
| | So i have an original char * s with size of n; Can someone show me how to create another char * p with twice the size of s? and then fill p with 2 copy of s? Thanks. |
| | I was already thinking along ARKoenig's suggestion and revised my code to use arrays. It was working pretty well until I made some minor changes. Now it loops non-stop without any prompt for the player to make a play. I am sure it is a small error, but I can't … |
| | Good evening guys.... i'm newbie in here and in c++... while i in the middle of pratice in making program... i try to make a stack that can check whether the string that user input is palindrome or not. i'm using visual studio 2010 and get autos error this is … |
| | I am completly lost on this could someone point me in the right direction into where I am going wrong with this code. [CODE]#include <iostream> using namespace std ; int main() { int x ; int y ; int temp ; int remainder ; // read in the two integers … |
| | i made a test program, this line " *ps.Working_Hours=10;" generates mistake. why ? [CODE]#include <cstdlib> #include <iostream> using namespace std; class Salary { public: int Working_Hours; float hour_rate; float x; }; int main(int argc, char *argv[]) { Salary s; float yy; s.Working_Hours=7; s.hour_rate=30.5; Salary* ps; ps=&s; *ps.Working_Hours=10; cout << "s.hour_rate=" … |
| | write a pseudocode algorithm tp prompt the user to enter a number and it should tell if the number is odd or even.........i need help |
 | am new to c++. i want to create a desktop application but i don't know how to create a user interface-forms like vb.ne forms using dev c++ IDE. how do i go about it. |
| | I need help in using 2d arrays in c++. I want to output a table that looks like this 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 … |
| | Ok i've got this simple code to encrypt a msg with a private key. When i run the app it crashes. Any help? [CODE]#include <stdio.h> #include <string.h> #include <openssl/rsa.h> #include <openssl/pem.h> int main() { char keyy[] = "Private key here"; unsigned char *key = (unsigned char* )keyy; printf("%d\n",sizeof(keyy)); RSA *public_key … |
| | I'm trying to write a program which uses 4 class files. However, I've got some issue regarding the error I got from cygwin using g++ command, it says Calling fdopen: bad file descriptor when I try to include the files I need on top of my header files. I'll show … |
| | Is it possible to have an array as a class member? It is part of my Wumpus Hunt exercise. I want to do the following: [code] class Room { blah blah; }; int main() { for (i = 0; i < 3; i++) { Room adjacent[i]; blah blah; } [/code] … |
 | [code] int main() { const char* p = "Hello"; cout << sizeof(p) << endl; } [/code] Why this is 4 ?  |
| | Hey, I'm writing a wheel of fortune game and trying to figure out how to make the game update what players turn it is. It is assumed that there is only three players, and the variable "int players = 1" is defined globally, so if I change it in the … |
| | My teacher has given me an assignment to parse a text file that contains no more than 25 "Students" the Student object has a Name, and five grades contained within an array. Now, I've set up the Student file, the Array template file per his instructions and i'm reading in … |
| | Hey, This is probably a newb question, but what all can a string type variable hold? Is it restricted to just letters or can it hold things like "/\|;:'><!@#$%^"...? |
| | Hello all i need help with my school project which is to create c/c++ program to demonstrate the AI problem of coloring the Australian map With Forward Checking, i Kind off dumb when it comes to c/c++ anyone can help me with the source code? Thank You |
| | O.K., I have a project I'm working on. It uses 8 classes (I'm only showing 2 and main). It gives me a "bad_alloc" error when the obj is instantiated. When obj is removed it works fine (or call the personType class that "should" be inherited from extPersonType.) Any thoughts of … |
 | I am making a program for my class where I handle equation problems such as: 2a-3b+5c=10 3a-2b-3c=-5 where the answer would be: 5a-5b+2c=5 This is what I have so far. It still isn't perfect cause I still haven't figured out the "=" part. I do have it performing the math … |
| | Hi could someone help me with my existing code !? I need Write an OO program using two Classes to create a guessing game in which the user must guess a number between 1 and 100 . The user is given a maximum try of 10 tries to guess each … |
| | Hi, i'm a student and i needed help in storing all my information from C to a text file. Could anyone help me out. Thank you |
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