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;
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;
#include<iostream> #include<conio.h> using namespace std; int main(void){ clrscr();
[Code] ....
I am trying to print ascii characters but problem is If i put a limit in for loop to 255 or more than 126 the output don't stop it keeps on going
I know there is another way to this program but what i want to know this why this happen in this logic....it doesn't happen if a<=125 or less then 125.
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?
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(){
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) {
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: ";
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.
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:
int[] stock = new int[] { 10, 10, 10, 10 };
How to set a limit on the elements that they will never go below to the negative integers and over 10?
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;
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
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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());
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, the awards is $10,000.
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?
In my program, i have a function, example: bool open(string szString); this function i have known it's fix address, example: 0x12345678 Because of my computer which has low capability, if this function is called 1000 times per second it will be hanged, slow. So i want limit the number of function call down to 500 times per second. how will i do with C/C++?
In my platform, Windows 7 Ultimate 64 bits with Service Pack 1 over a x86-64 AMD microprocessor, AMD Phenom II 1090T X6, with a total of 4 GBytes of RAM memory), one C++ program can only allocate up to 2 GBytes of dynamic memory (using operator new, so Heap memory).
In am using the IDE Microsoft Visual C++ 2010 Express Edition to compile my C++ program and generate the executable file (for Win32).
In my system, there are much more available memory than 2 GBytes (yet remain 1 GByte of RAM memory and the virtual memory), so, Why can't my C++ program allocate more than 2 GBytes of memory? Do I need to configure something in the IDE to allow more memory to the program?
I was wondering how to limit error message to one only.
For example
cin.getline(stringname,7); for(int i=0;i<size;i++){ if(strcmp(stringname, "hello")=0) cout<<"Found!"<<endl; else cout<<"not found"<<endl; } not found not found .......
I wrote this code, but now need to apply a limit to the recursive depth. This is the format that I have to use. How would I pass a limit so that it stops after a given number? I'm just confused about where to apply it.
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; if (string1[i] == string2[j]) return compute_edit_distance(string1, string2, i + 1, j + 1, limit);
So I am have made this 2D ball game. But I want to set a time limit for each level. I want player to play that level for maximum 3 minutes. After 3 minutes the game level should end. I have used allegro 5.0.10 with c++ . How to achieve it?
I am trying to make a double array, but I keep getting an error Segmentation fault (core dumped) when I make more than 105 elements in the array. I need to make 114 elements.
I am building my array with myarray[999] and increasing the number doesn't seem to do anything.
Suppose I make a class, something like having the constructor being invoked first makes sense, I don't have a problem with that. But, how could I limit access to functions until certain functions are called? Perhaps this isn't built into the language so you can't. And maybe this problem never comes up. For example if you have a set() and get() functions, if they are both public functions, there doesn't seem to be a way for the compiler at least now if set() never gets called you shouldn't call get(). I just see this as error prone if you need to use libraries, you have to know not to do it from documentation instead of something the compiler can check.