C++ :: Show Prime Number Between A And B And Count Them

Dec 24, 2014

This shows any prime number between a and b and also counts them*/

#include <iostream>
using namespace std;
int main(){
int a;
int b;

[Code] .....

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C :: Calculate Prime Numbers In Range And Return Count Of Prime Numbers

Apr 28, 2013

I wrote a program which sends a starting and ending range to other processes and the processes calculate the prime numbers in that range and return the count of prime numbers to the head process, process 0. But this is not working properly at the moment. I realize I still have to split up the range based on how many processes I have...I still have not figured out how I want to set that up. I

Code:

#include <stdio.h>
#include <stdlib.h>
#include <mpi.h>
int isPrime(int num);
int main(int argc, char **argv){
}

[code]....

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C++ :: Prime Number Program Not Working With Odd Non-prime Numbers

Dec 2, 2014

I have a program that gets prime numbers that doesn't work. It looks like it works for all prime numbers except odd non-prime ones. Here is the code:

Code:
#include <iostream>
using namespace std;
bool isPrime(int prime) {
while(true) {
int track = 0;

[Code] ...

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C/C++ :: Finding All Prime Numbers To Nth Prime Number

Aug 24, 2014

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.

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C :: Program That Allow User To Enter A Number N And Print Nth Prime Number

Nov 3, 2013

I need to write a program that will allow the user to enter a number "n" and the program tell you that the nth prime number is .....

EXAMPLE

user enters 55

printf("The 55th prime number is %i", variable");

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C++ :: Receive Number From User And Output Largest Prime Number

Nov 20, 2014

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:

#include <cstdlib>
#include <iostream>
#include <cmath>
using namespace std;
bool isPrime(int num);//function prototype

[Code] ....

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C++ :: Search For A Number When Vector Is In Order - Count How Many Times That Number Appears

Feb 6, 2014

In this program what i'm doing is to search for a number when the vector is in order, and count how many times that number appears, the problem is that count how many times the number does not appear, but when its appear the program stays in an "standby mode" and the cursor does not move.

int buscarNumOrdenado (int x [MAX]) //MAX is the define {
int num,d, LimiteInferior, LimiteSuperior,mitad;
d=0;
LimiteInferior = 0;
LimiteSuperior = MAX-1;

[Code] ....

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C++ :: Random Number Generator - Count How Many Times Each Number Shows Up

Sep 26, 2012

I'm running a game online and designing a program to generate Enemy Stats. Basically, it's supposed to generate 25 numbers between 0 and 7(to represent 8 Attributes on a 25 Point Buy system) and count how many times each number shows up.

Here's what the code looks like:

Code:
#include <iostream>
#include <ctime>
#include <cstdlib>
using namespace std;
int Generate() {
int r= rand();
int s= r%7;
[Code] ....

And here's two outputs.

1: Code:

12133089220 12133089220 12133089220 12133089220 12133089220 12133089220 12133089220 12133089220 12133089220 12133089220 12133089220 12133089220 12133089220 12133089220 12133089220 12133089220 12133089220 12133089220 12133089220 12133089220 12133089220 12133089220 12133089220 12133089220 12133089220 Stats[0]= 25 Stats[1]= 0 Stats[2]= 0 Stats[3]= 0 Stats[4]= 0 Stats[5]= 0 Stats[6]= 0 Stats[7]= 0 Stats[8]= 0 Disallowed system call: SYS_socketcall

2: Code:

14787708434 14787708434 14787708434 14787708434 14787708434 14787708434 14787708434 14787708434 14787708434 14787708434 14787708434 14787708434 14787708434 14787708434 14787708434 14787708434 14787708434 14787708434 14787708434 14787708434 14787708434 14787708434 14787708434 14787708434 14787708434 Stats[0]= 0 Stats[1]= 0 Stats[2]= 0 Stats[3]= 0 Stats[4]= 25 Stats[5]= 0 Stats[6]= 0 Stats[7]= 0 Stats[8]= 0 Disallowed system call: SYS_socketcall

Note that the number does change, but only between runs.

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C++ :: Count Number Less Than Average Of All Number Combined

Mar 9, 2013

The following fuction from a class is supposed to count the number less then the average of all number combined. but it does not do that, now the fun part if you change it to count the number greater then the average it works great.

void IntegerArray::countBelowAverage() {
avrg=calcAverage(avg);
int count=0;
for(int x=0; x<100; x++) {
if (list[x]<avrg)

[Code]...

How do i get this to post in the proper format?

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C++ :: Number Is Prime Or Not

Nov 7, 2013

#include <iostream>
using namespace std;
int main() {
//input output

[code]....

its supposed to tell whether the inputted number is prime or not

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C++ :: Prime Factors Of A Number?

Oct 22, 2013

I have to create a program where I need to find the prime factors of a number and express it using exponents.

For example, for the number 1368 should output:

1368 = 2^3 * 3^2 * 19^1

This is my code:

void primeFact (int n){
int i;
int score = 0;

[Code].....

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C++ :: Prime Number Factorization

Dec 9, 2013

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;

[code].....

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C++ :: Prime Number Between Two Values

Mar 14, 2014

I wrote this program to print prime numbers between 2 and 10 but it only prints '3'. here is the code

#include<iostream>
#include<conio.h>
using namespace std;
int prime(int x, int y);
void main(){
int n=2;

[code].....

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C/C++ :: MPI Prime Number Search?

Mar 14, 2015

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.

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C++ :: Finding If A Number Is Prime Or Not

Oct 3, 2013

cin.ignore (10);
return 0;
}

Its not working

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C/C++ :: Prime Number Counter?

Feb 23, 2014

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

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C++ :: Finding If A Number Is Prime?

Oct 3, 2013

We need it to say if the number is prime or not we need the equation for the if statement or if we have something else wrong to let me know.

#include <iostream>
using namespace std;
int main () {
int number;
bool countr;
for (countr = 0; countr <= 2; countr ++)

[Code] ....

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C/C++ :: Test If A Number Is A Prime?

Mar 13, 2014

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;

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Visual C++ :: Program That Count From 1 To 12 And Print Count And Its Square For Each Count

Dec 16, 2014

4.1 Write a program that will count from 1 to 12 and print the count, and its square, for each count.

4.2 Write a program that counts from 1 to 12 and prints the count and its inversion to 5 decimal places for each count. This will require a floating point number.

4.3 Write a program that will count from 1 to 100 and print only those values between 32 and 39, one to a line. Use the incrementing operator for this program.

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C++ :: Count Number Of 0 In Binary Number

Apr 11, 2013

i am writing a program that accepts a decimal number from the user and convert it to binary numbers. After the conversion, i should count the number of 1's and 0's in the said binary number. I got upto converting and counting 1's using Brian Kernighan’s Algorithm. But, i can't seem to get it to count the number of 0's.

#include <iostream>
#include<bitset>
using namespace std;
int main() {
int num,count=0,Zero,count1 =0;
cout<<"Enter the number:";
cin>>num;
string binary;

[code].....

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C++ :: Faster Prime Number Algorithm

Oct 19, 2014

Can I possibly get a better implementation of a prime number detecting algorithm than the one I already have below?

Code:
#include <cstdio>
#include <cstdlib>
int main() {
int no, high, low;
int divisor;

[Code] .....

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C :: How To Store The Highest Prime Number

Feb 17, 2013

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?

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C :: Calculate Prime Number Using Loops

Oct 10, 2013

how would I write a while() loop that calculates the sum of all prime numbers from 1 - 50.

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C++ :: Choose A Number To Check If Prime Or Not

Oct 20, 2014

#include "stdafx.h"
#include "iostream"
using namespace std;
int main (){
int x;
int i;
int e;

[Code] ....

is the logic good ? and why the program is looping

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C/C++ :: Finding Prime Factors Of A Number

Mar 18, 2015

I am trying to find the prime factors of a number but when i compile and run my code after i enter a number it just closes it doesn't print ....

included library : [URL] ....

#include "std_lib_facilities.h";
void prime(int n) {
int result;
result = 0;
int i;
for (i = 2; i == n*n; ++i)

[Code] .....

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C/C++ :: Program To Check Number Is Prime Or Not

Jan 12, 2013

What is the minimum range of numbers which we need to go necessarily to check either a number is prime or not?(for all integers) ....

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