C++ :: Find The Sum Of Primes Below Limit
Apr 15, 2013
I have to find the sum of primes below limit. My program works fine when I try to find primes less than 10. However, when I run it for the sum of primes less than 100, I get 166337 when I am supposed to get 1060. My program works on modular arithmetic, where any prime greater than 3 can be expressed as 1 or 5 mod 6.
Here is my code:
#include <iostream>
using namespace std;
int main(){
unsigned long long prime, sum;
int limit = 100;
[Code] ....
OUTPUT:
SUM: 166337
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Jul 13, 2013
What's actually wrong with the program....I'm trying to print the primes in limit of L1 and L2 ;L1<L2.... */
Code:
#include<stdio.h>
#include<math.h>
void main(){
int L1,L2,n=0
printf("Enter Limits by a space:
}
[code]....
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Aug 20, 2013
I'm a beginner in C and system programming. I need to use multiple process and POSIX shared memory to find all primes between 0 and 100. My code compiles, but the result is not correct, it shows all the multiples of 3 as primes.My instructor also mentioned that the multi-process portion will fork() the appropriate number of child processes. The parent process will create a POSIX shared memory object to which the sub-processes will attach. I am confused about the things he said about parent process.why I'm not getting the right primes?
Code:
#include <stdio.h>
#include <stdlib.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/mman.h>
[Code]....
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Oct 8, 2014
I'm trying to understand why this won't work, the output i get is a list of even numbers. I'm trying to get all prime numbers below the number thats scanned in.
#include <stdio.h>
int isPrime(int number);
int main(){
[Code]....
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Feb 11, 2015
I'm having some trouble finishing my code, it's meant to give the number of twin primes between an interval e.g. 1 to 1000000 and the answer should be 8169 but all I can get it to is 8168
#include <stdio.h>
int prime (int num) {
int div;
if (num == 2) return 1;
if (num % 2 == 0) return 0;
div = 3;
while (div*div <= num) {
[code]....
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Jul 27, 2014
This program prints out the total number of up to 100,000. How to do is to print out the number of twin primes up to 100,000. Is it as simple as adding an if statement "if(primesList[j] - i == 2)"?
#include <iostream>
#include <string>
#include <cmath>
using namespace std;
int main() {
int primesCount = 0;
[Code] ......
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Oct 9, 2014
I'm trying to write a program that will find all the factors and primes for a range of numbers. I have the inner loop working but I am having trouble writing the outer loop that will output the range of numbers instead of just finding the factors for one number.
int n1 = 0;
int n2;
int factor = 0;
cout << "Enter a starting number: ";
cin >> n1;
cout << "Enter a ending number: ";
[Code] ....
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Nov 11, 2013
Is there any way to set a "lock" on certain couts from system ("cls"). You can this with const to "lock" a variable to a certain value so I am wondering if that is true for couts from system ("cls"). This would make my program much simpler to write.
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Feb 22, 2013
I want to set limit on cin for example
int i;
cout<<"Please enter 4 digits id: ";
cin>>i
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Apr 26, 2013
I have created a new array and have wrote a code which will decrease || increase the value of the array element. I been trying to figure out how to set the value limit. For Example:
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May 8, 2014
Why is this code crashing ? and how do I put a limit of 100 questions to be outputted but not for the test to end ? Also this doesn't seem to be randomizing at all ?
#include <iostream>
#include <vector>
#include <cstdlib>
#include <ctime>
using namespace std;
int main() {
vector<string> questions;
vector<string> answers;
[Code] .....
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Feb 15, 2013
Im working on a small code and am trying to limit the size of the mysql databse string its pulling.
It can only be 119 characters, or less if its more i would like to do nothing, but if its meets the requirements it runs the script.
Code:
int32 message_id;
string_t message ="Is requesting some one to respond.";<_______________TEMP SHOULD BE THE POSTERS MESSAGE
string_t username = "Guest";<_______________TEMP SHOULD BE THE POSTERS NAME
// char will not be logged in so get the id manually
[Code] ....
So here is where I'm heaving the problem
if(message is less then 119 characters run script )<<___________THIS IS THE CODE LINE IM TRYING TO LEARN
{
char buf[110];
sprintf(buf,"[Web Chat] %s %s",username.c_str(), message.c_str());
[code].....
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Mar 8, 2014
My question is : can you limit an action to a certain time range?
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Feb 2, 2015
Suppose you want to develop a program to play lottery. The program randomly generates a Lottery of a three-digit number( any number from 100 to 999), prompts the user to enter a three-digit number, and determines whether the user wins according to the following rule:
1. If the user matches the lottery in exact order , the awards is $100,000.
2. If the user input matches the lottery digits, the awards is $50,000.
3. If two digit in the user input matches a digit in the lottery, the awards is $30,000.
4. If one digit in the user input matches a digit in the lottery,
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Sample:
The winning number is 865.
Your ticket is 865 then 100000
Your tickect is 686, or 568,.. all digits are right but not in order
You get 50000
Your ticket is 860, or 186 .. then 30000
Your ticket is 800, 706, 600.. just one digit much you get
10000
Else
0
Im using if/else statements. Which syntax would I use to figure out the limit between 100-99?
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Jul 8, 2013
Is dere is any limit in number of objects of a class?
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Feb 20, 2013
I need a program in c++ that will enter a limit of the loop. using nested for loop with a limit of 3 loops only.
like this !
for (){
for (){
for (){
cout
}
}
}
Sample output:
Enter a number : 3 [enter]
1 2 3
4 5 6
7 8 9
2 3 4
5 6 7
8 9 10
3 4 5
6 7 8
9 10 11
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Apr 23, 2013
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May 13, 2014
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}
not found
not found
.......
I want to get only once not found
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Jul 9, 2014
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int compute_edit_distance(char *string1, char *string2, int i, int j, int limit) {
if (strlen(string1) == i) return strlen(string2) - j;
if (strlen(string2) == j) return strlen(string1) - i;
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[Code] .....
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Jul 18, 2014
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Random r = new Random();
int IDrandom = r.Next(0, 9);
Emp_ID.Text += IDrandom.ToString();
//Emp_ID.MaxLength = 10; does not work
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Feb 26, 2014
I calculate two numbers "R1",R2"
when i make
cout<<R1;
cout<<R2
i get
R1=51,9151
R2=51,915
when i make
Code: if (R1>R2) cout<<"i am here" he print the message
but they are equal. how i made limit the number of flottant to get equal numbers?
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Jan 2, 2014
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Jun 1, 2014
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Feb 28, 2014
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Apr 30, 2013
In my attempt to capture multiple files using CFileDialog I discovered that there is a limit on the number of characters in the file name buffer. [URL]
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Code:
// get a list of the files to process
wchar_t szFilters[]= _T("All Files (*.*)|*.*||");
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CFileDialog fileDlg(TRUE, _T(""), _T("*.*"),
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[code]....
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