C++ :: Program To Tell Whether Number Is Prime Or Not - Illegal Structure Operation
Mar 2, 2013
In 83rd line message says: "Illegal Structure operation". But I didn't use any structures! How to correct it?
#include<iostream.h>
#include<conio.h>
#include<math.h>
int prime(int);
int reverse(int) ;
int power(int,int);
int rectangle(int,int);
int square(int);
int circle(int);
void tables(int);
class Secure { private: int seconds; bool isRUNNING; public: Secure(int seconds) {
[Code] .....
ERROR:
error C2276: '&' : illegal operation on bound member function expression
I read that due to explicit casting, threads cannot be created within a class. I'm trying to thread a scanning system to relieve stress on my main program/module, rather than having the scanner stunt their performance.
So I need to write a program which tells the user if the number they input is prime or not. I have done so and included the code below. My problem is that I need to allow the user to input if they want to enter another number after the first one using y or n and I am having trouble figure it out.
#include <cstdlib> #include <iostream> using namespace std;
I'm a new coder for C++, and I've recently learned java before starting this programming language. I'm attempting to find all prime numbers up to the number a user enters (i.e. User enters 10, System shows "1,2,3,5,7"),
#include <iostream> #include <cstdlib> using namespace std; int main(int argc, char** argv) { int num; cout << "Enter a positive number." << endl;
[Code] ....
I've been looking at my forloop, and I can't seem to pinpoint the problem with it.
I am attempting to write code that receives a number from the user and outputs the largest prime number underneath the user's number. There are no errors in my code, but no matter what number is imputed, the program says the largest prime number is 1. I cannot find where the issue is in the code. Here is the code I wrote:
The project is "Design and write a program to model the operation of incoming flights computer screen that is normally found at a typical small airport like Moshoeshoe I airport (if they do have one). The following provides the information that needs to be displayed about each flight:
• Airline - [string of maximum length 15] Name of the airline, eg. FlySAA • Flight Number - [string of maximum length 5] eg. 04120 • Origin - [string of maximum length 25] Place where the flight originated from eg. Johannesburg • Date/Time - [integers: Hour, Minute, Day, Month, Year] Arrival time of the flight • Status - [string of maximum length 15] Whether the flight is "OnTime" or "Delayed"
I am trying to factorize semi-prime numbers by using a brute force method and a square root method.The brute force method should start by multiplying all odd numbers between 1 and the semi-prime number. Meaning that 1 should multiply 3 then 5 then 7, etc. Then three should multiply 5 then 7 then 9 and so forth. The first number would never multiply a number equal to or less than itself.
bruteForce(int x){ f1 = 1; f2 = f1 + 2; while (f1 < x){ for (f2 = x; f2 <= x; f2-2){
[Code] ....
For my other algorithm, I want it to get the square root of the semi-prime and then start multiplying odd numbers around it. I made it so that the square root would have to be set to the next even number (in case it was a factor). If the product of the two odd numbers (a * b) is greater than the original semi-prime, I would multiply b by the next smaller number than a. Conversely, if the product of a and b is less than the original semi-prime, it will multiply a by the next odd number larger than b. This will repeat until the two correct factors of the original semi-prime are found.
Algorithm:
SquareRootFactorize(int x){ int N = x; sqrtN = sqrt(N); if (isOdd(sqrtN) == true) sqrtN = sqrtN + 1; f1 = sqrtN - 1; f2 = sqrtN + 1;
We are working on building a cluster and needed to create or find a program writen in C that we can run. I was thinking a program that finds prime numbers and insert them into a MySQL database. I have never worked with C so I don't know where to start or anything. I have a week to prove our project is worth keeping and our cluster is almost completely installed we just need to create a program.
I have to write a program that asks the user to input a positive integer, counts how many primes there are before this integer, then divide the number of primes by the integer. Here's what I have so far:
int n; int counter = 0; cout<<"Enter a positive integer n."; cin>>n;
[Code]....
the value of the integer counter is supposed to increase whenever a prime number is identified but it's increasing n times
my assignment is to print out the numbers from 2 to 20 stating if they are primes or not using loops and/or a function..once i execute, it throws the program into an infinite loop...
#include <iostream> #include <cmath> using namespace std; bool prime(int n); int main() { int i;
Basically, I am suppose to compute 10 numbers and find their highest prime number for each of them. I've already have the inputs working, and set up 2 arrays to store inputs and their highest prime number. But I am uncertain on how to find and store their highest prime number. How to start it off?