51,593 Topics
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| | Hello again all, I have a project in which I need to read in a text file: 1000 1000 1111 500 1500 1000 2000 900 2222 2000 2500 2000 3000 1500 3333 2000 3500 2000 4000 600 4444 2500 4500 2000 5000 2500 5500 2222 5555 2000 6000 1999 this …  |
| | [code] // fibonacci2.cpp : Defines the entry point for the console application. #include "stdafx.h" #include<iostream> using namespace std; int fibonacci(int n)//declare function { //declare variables int x1 = 0; int fib ; int x2 = 1; if(n >= 1) { for(int i=2;i<= n; i++) { fib = x1 + x2; …  |
| | I have a 2x2 matrix A stored in data_ 1 3 2 4 (column major order) and a 2x2 matrix B stored in b.data_ 5 7 6 8 and I'm using the function below to append (stick underneath) B to A. so my result should be 1 3 5 7 … |
| | I'm trying to find a formula for copy[3] = b.data[0] copy[4] = b.data[1] copy[5] = b.data[2] copy[9] = b.data[3] copy[10] = b.data[4] copy[11] = b.data[5] letting the right hand side be b.data[i], I can see this is like copy[3] = b.data[0] multiply by 2, add 3 copy[4] = b.data[1] multiply … |
| | I am a very new beginner so please excuse my ignorance. I literally started learning c++ 3 days ago. I am attempting to read a file and split each line into 2 arrays. The first half the line is just text and i would like to store it for re-output …  |
 | Hi, I've been working on a sudoku game, which seems to be working pretty well so far. I've managed to make a basic solver, and the interface is pretty nice :icon_cheesygrin: But i'm having problems trying generate a random unique sudoku. I need to be able to create 3 different … |
| | Hi fellow forumers...I am new to this forum and programming. Regarding the above topic..Is there and code that solves this sort of question? My question:A program that input 10 integers and find the largest value. Thanks very much! |
| | I need help with inserting a string for both key and value to a map. [code] while(!myHuffFile.eof()){ string word, code; int freq; myHuffFile >> word >> freq >> code; if(word == ""){ break; }else{ _fileMap.insert(pair<string,string>(word,code)); _freqMap.insert(pair<string,int>(word,freq)); } } [/code] error: error: conversion from `std::_Rb_tree_iterator<std::pair<const std::string, std::string> >' to non-scalar type … |
| | i dont knw why i am not getting the right ans can someone help? [CODE]#include<iostream> #include<string> #include<cmath> using namespace std; int main() { int sum=0; string val; cout<<"enter a binary number:"<<endl; cin>>val; for(int i=0;i<val.size();i++) { cout<<val[i]; } for(int i=1;i<val.size();i++) { int x = val.size(); sum+=val[x-i]*pow(2.0,i-1); } cout<<sum; return 0; } … |
| | i cant get this to loop and i cant get it to error trap cout << " Please choose an odd number 3-9 to calculate width and height of your choosing\n"; cin >> number; [CODE]do { if((number!=3) || (number!=5) || (number!=7) || (number!=9)) { cout << "invalid choice " <<endl … |
 | I am trying to get a variable number of arguments in one function, and pass them to another function. I tried this: [code] #include <iostream> #include <stdarg.h> void Function1(unsigned int num, ...); void Function2(unsigned int num, va_list ap); int main(int argc, char *argv[]) { Function1(3, 1, 2, 3); return 0; … |
| | 1.Password authentication Write a C++ program that has asks the user to enter a string-input. If the string matches the password stored in the program, then print a suitable welcome message, otherwise allow the user to re-enter the correct password. The user has at most 3 chances to enter the … |
| | Hi, I am using Visual Studio 2008 Express Edition, and I wrote my code as follow: ====================================code starts [CODE]#include <iostream> #include <string> #include <sstream> using namespace std; int main() { string *p; int n; cout << "Please input the number of students"<<endl; cin>>n; p = new string [n]; cout <<"Please … |
| | Hey, can someone tell me where I have to start? I wanna make a program like cheat engine but I have no clue how :o... Im [B]not[/B] a beginner ( but also not an expert :P ) in C++(/CLI)... What functions do I need? etc. :p Thx ;D |
| | I have same problem during compilation: [CODE]..\\..\\..\\hal\\include/waiting-point.hpp: At global scope: ..\\..\\..\\hal\\include/waiting-point.hpp:7: error: expected type-specifier ..\\..\\..\\hal\\include/waiting-point.hpp:7: error: expected ')' ..\\..\\..\\hal\\include/waiting-point.hpp:7: error: expected initializer void operator delete(void*) ..\\..\\..\\hal\\include/waiting-point.hpp: At global scope: ..\\..\\..\\hal\\include/waiting-point.hpp:15: error: expected type-specifier ..\\..\\..\\hal\\include/waiting-point.hpp:15: error: expected ')' ..\\..\\..\\hal\\include/waiting-point.hpp:15: error: expected initializer void operator delete [](void*) void MyVector<T>::reallocVector(size_t) MyVector<T>::MyVector() MyVector<T>::~MyVector() bool … |
| | I have: [CODE]void hughint::operator *=(hughint y) { int i,t1,t2,prod,remainder; int carry=0; for(i=num.length()-1;i>=0;i--) { t1=(int)get(i)-(int)('0'); cout<<"t1: "<<t1<<endl; t2=(int)y.get(i)-(int)('0'); cout<<"t2: "<<t2<<endl; if(carry>0) { prod=(t1*t2)+carry; remainder%=10; carry=remainder/10; } } }[/CODE] I'm using 123*100 and the answer I keep getting is 123. Help please. |
| | i must write a program that will convert lower case letters to upper case and vice versa and if a number is entered it must display char is not a letter here is what ave written but when i run it it does not do the conversion.thanks //to convert lower …  |
| | I am very new to C++ and I want to make a program that converts a binary number (up to seven digets) into a decimal value. Anyone know how I can do this? |
| | C++ program creating array the uses the dot product? normalized dot product // Matches the Signal with the Pattern Signal using the "dot product" // of Signal and Pattern divided by the square root of the energy of each. // According to the Cauchy-Schwartz inequality, the result will be // …  |
| | Hi; I have a number of text strings in an access db file. I want to compare those text strings with the user input. I need to make sure that atleast 60% of the text input matches with the correct string to declare it a correct answer. e.g. for a … |
| | Hi, I want to know when and where is memory allocated for static variables. If: 1) static variable is in a function 2) static variable is a member of a class 3) a global static variable inside a file of code. Much appreciated. Google hasn't been much of a friend … |
| | i think im missing something could use a pointer heres the problem A palindrome is a string that reads the same backward as forward. For example, the words mom, dad, madam and radar are all palindromes. Write a class Pstring that is derived from the STL string class. The Pstring … |
| | My professor gave use the code to a function that draws a line in the grid. I have made my class function but I am not sure how to use it with this function he gave us. [CODE]void drawLineInGrid(char grid[][MAX_Y], const Line &line) { int xDifference, yDifference, xIncrement, yIncrement, error; …  |
| | hello,dis is caroline doing ma mca from blr i wanna know the concept of freind functions and classes used in library managemment sysytems |
| | good evening I was wondering if someone could walk me through creating a find and insert functions for the following class [CODE] //map of characters //class to create a map of words, character at a time and allow access to each character and store a list of lines //from the … |
| | [CODE]#include <iostream> using namespace std; int main(){ for (int i = 0; i < 1000; i++) { int die1, die2, roll1, roll2, point,; die1 = 1 + rand() % 6; die2 = 1 + rand() % 6; point = die1 + die2; cout << "You rolled: " << point << … |
| | I have been learning c++ and Allegro (graphics libary) for about a year, and have been trying to get this code to work (in particular, passing the array of classes), and when compiling i get the following errors C:\Documents and Settings\User\Desktop\npc.h In member function `void cNPC::NPCmove(cNPC*)': 96 C:\Documents and Settings\npc.h … |
| | Can someone please help me get my code running! I am trying to do a sectional sort based on mileage. I have got a lot of code wrote based on the book, but I can not get it to work or figure it out! Please assist! Class [code] #include <iostream> … |
| | Hey Everyone, I am trying to compile and run a program for my C++ class, and I am getting a Segmentation Fault as a runtime error. I looked at my code and my datafile to make sure that there was not an issue but I can not seem to find … |
| | I seem to be inventing my own syntax here. The idea seemed simple enough: use the keyword 'new' to allocate space for a new integer array, and populate it with a few integers. Where have I gone wrong? [CODE] #include <iostream> using namespace std; const int SIZE = 5; int … |
| | If I uncomment the 'int x;' above main, and comment out the int x = 0 inside of main, it works, but I don't want to use global variables. What I can't understand is why x is out of scope. The text I'm using says “vars having local or block … |
| | I know *what* the problem is, I'm just not sure how to proceed... Here's the code I have so far: [CODE]void BinarySearchTree::writeIteratively(ostream& outfile) const { TemplateStack<Node*> stack; // this is to set up the actual stack Node* current = root; while (current != 0 || !stack.isEmpty()) { // here is … |
 | I was just in class, learning about STL and class templates. My teacher said you cannot split the class declaration and the function definitions into the normal header/cpp file like you can with non template classes. Is this true, and if so why? I assume it would have somthing to … |
| | I tried using a lib (svgacc) in Borland C++ both from source directory(i.e. bin) and lib and include directories(ofcourse after previously copying the in those dirs D:). The error is : Linker error: undefined symbol _videomodeget in module main.cpp . I tried building in a project of modules as well … |
 | Hi All, I want to parse simple XML file and I was looking if there is C++ standard library classes for doing that. IF no what are good yet simple XML C++ third party libraries? Thanks |
| | I am trying to write a code that calculates the end time of an event (in military time) based on 6 values the user enters: the starting hours, minutes, and seconds, and the duration hours, minutes and seconds. The user can't enter values greater than 24, 60, and 60 for … |
| | Hey guys, I need to write a code to evaluate postfix expression. I started on it but now I'm stuck. Below I have what I started on and the file that it needs to go into. I need it to do the following: If the token is an operator of … |
| | /* When I run this code the random numbers that are supposed to be generated will not cout. Any suggestions would be a great help!*/ [CODE]int main() { Fraction operand1, operand2, resultant; int a, b, c, n, d; char op, choice; //char opchar: srand(time(0)); system("cls"); //a.setAll(1); //1 indicates that it's … |
| | Hey, I was just wondering, is it possible to create an application in C++ that once you dropped something onto it i.e a text file it would then upload to a server. For example: [code] // application checks to see if something has been dropped // get the name and … |
| | I need to use this to make a program to find the prime factorization of a number, please help me get started. input a value to factor while input value > 1 let leftToFactor = input value let factor = 2 while factor <= leftToFactor while factor divides leftToFactor (i.e. …  |
| | I am trying to change the default value in a print function so that n > len, however, when I do so, the output has garbage at the end of it. How do I properly get rid of the extra characters? [CODE]#include <iostream> #include <assert.h> #include <cstring> using std::cout; using … |
| | I am trying to make a custom stream class because for some reason standard string objects crash my program when i try to output them, i believe i know why now. When i tried to overload the << operator for a string object by making it a friend of my … |
| | how to write a program in c++ for this type of question? Write a calculator program in c++ that allows the user to select which operation they would like to perform such as: Addition, subtraction, multiplication, division, modulus, Square, Square root, Convert Celsius to Fahrenheit (Fahrenheit = 1.8 Celsius +32), …  |
| | Hello I got a problem while trying to use rand() fucntion. Just by using it its self it generates a random number from 0 to RAND_MAX. The prob is that I don't know rand max, so how can I make a costume generation, like generating from 0 20 or 0 … |
 | Hello everyone i am new in C language and need some basic help. see this program, [CODE] void main(void) { int a,b; clrscr (); { for (a=1;a<5;a++) { for (b=2;b<6;b++) { printf ("value of a is %d , value of b is %d \n",a,b); b=a+1; a=a++; } } } getch(); … |
| | Hello I'm new to c++ i need help with a area and perimeter function. I can get the program to run fine with out using it as function but cant with trying to get it to run as a function. Here is my code: [code] #include <iostream> using namespace std; … |
| | quick question how will i go about setting setting up characters to draw a shape such as a triangle. but the user must pick an odd # that equals to the shape . the one i have is simple but idk how to input the number the user choosen to … |
| | Im working on a knights tour problem. And ive run into some issues. Im able to get the program to run randomly till it finds a full tour but how would i go about running it only a 100 times and then printing the average number of moves the knight … |
| | I'm trying to use matrix multiplication to multiply b onto a. Using the method I've written below, changes the values of matrix A which I've then realised messes up later calculations. Would the best way to get around this be to make two copies of the matrices A and B … |
| | I'm making a binary expression tree, and to do so I'm reading in values and putting them into a tree node and a pointer to that tree node into a stack. How do I use the STL stack implementation with pointers to my TreeNode class? relevant code: [CODE] stack<TreeNode> s; …  |
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