Re: loop printing value more than once.. Programming Software Development by jephthah … desired. before we start testing each number, we set [icode]isPrime = 1;[/icode] which is to say that we will assume…not will be reflected by the value of "isPrime".... if "isPrime" is 1, then the number is prime…index the outer loop to the next number, set "isPrime" back to 1, and repeat the process. and continue… Re: isPrime() Programming Software Development by Narue … it hard to believe that you can write IsPrime but not the main driver to print the… [0..100). I'm guessing you were given IsPrime and told to write main, which means [B… is loop from 0 to 100 and call IsPrime on the current number. If it returns true…( int i = 0; i < 100; i++ ) { if ( IsPrime ( i ) ) cout<< i <<" is prime… Re: isPrime() Programming Software Development by JRM … I find it hard to believe that you can write IsPrime but not the main driver to print the primes in… the range [0..100). I'm guessing you were given IsPrime and told to write main, which means ***you've*** come… Re: isPrime() Programming Software Development by hvengel An even more efficient and generalized isPrime() function. [CODE]bool isPrime (unsigned int number) { if (number > 3) { if (number % 2 == … Re: isPrime() Programming Software Development by hvengel …} sieveValue++; } sieve.push_back(wheelFactor + 1); sieveFull = true; } bool isPrime (unsigned int candidatePrime) { if (!sieveFull) fillSieve(); int fp = 0; while…; } [/CODE] Here is a wheel factorization version of isPrime. This uses a small wheel factoring sieve based on the… isPrime() Programming Software Development by forumposters I need to write a main() function, that loops over a bunch of numbers from 0 to 100, calls another function called isPrime() for each of them, and print out the numbers that are prime. I'm new to C++ and any help would be appreciated. Re: isPrime() Programming Software Development by sillyboy What narue said applies. But I'll help you a little: isPrime(int x) Re: isPrime() Programming Software Development by forumposters Here's what I've come up with so far: [code] #include <iostream> bool IsPrime(int num) { if(num == 0) return true; num = abs(num); for(int i = 2; i <= sqrt(num); i++) if(num % i == 0) return false; return true; }[/code] Re: isPrime() Programming Software Development by soeja This is more efficient. #include <iostream> bool IsPrime(int num) { if(num == 0) return true; num = abs(num); if(num % 2 == 0) return true; for(int i = 3; i <= sqrt(num); i+=2) if(num % i == 0) return false; return true; } Re: isPrime() Programming Software Development by soeja [CODE]#include <iostream> bool IsPrime(int num) { if(num == 0) return true; num = abs(num); if(num % 2 == 0) return true; for(int i = 3; i <= sqrt(num); i+=2) if(num % i == 0) return false; return true; }[/CODE] Re: isPrime() Programming Software Development by parameshyss Hi Soeja, This is more efficient.. and for 4 , 6 , 8(i.e., even no) .. ur code snippet will give wrong ans.. [code=c] #include <iostream> bool IsPrime (int num) { if ( 2 == num ) return true ; int l = sqrt(num) ; for(int i = 3; i <= l; i+=2) if ( 0 == ( num % i ) ) return false; return true; } [/code] Re: IsPrime.cpp Programming Software Development by csurfer … Hiroshe): [B]1>[/B] [QUOTE]if (IsPrime(num)==(true))[B][COLOR="Red"];[/COLOR][/B]… don't do redundant work as in [B]IsPrime(num)==(true)[/B] the following is enough: […code=c] if (IsPrime(num)) //No semicolon and a return of 1… [/code] [B]2>[/B] And in your IsPrime function with this line : [code=c]for (i=3… IsPrime.cpp Programming Software Development by ndfi54 …quot;random.h" #include <math.h> bool IsPrime(int num); int main() { int num; num=2; printf(&…num); for (num=3;num<=100;num+=2) { if (IsPrime(num)==(true)); { printf("%d\n", num); } } } …bool IsPrime(int num) { int i; double limit; if (num<=1… Re: isprime function (Python) Programming Software Development by TrustyTony Interesting HiHe, but I do not know if it is too biased to use only one number as case. Both isprime2 and isprime 3 seem to run more than my own isprime adapted as optimized from Project Euler (found in other prime tread recently posted to) Tony Re: isprime function (Python) Programming Software Development by HiHe … little timing experiment: ''' timeit_isprime.py check the speed of three isprime functions ''' import timeit import sys print(sys.version) def isprime2… C4715: 'isPrime' : not all control paths return a value Programming Software Development by Yaka …running how ever it gives this warning....C4715: 'isPrime' : not all control paths return a value....i…; "is a prime number\n"; } if (isPrime(number)==false) { cout << "\n"…Invalid number entered\n"); exit(1); } } int isPrime(int number) { int count=0,count1; for(count1=2;… Re: C4715: 'isPrime' : not all control paths return a value Programming Software Development by Yaka … the warning off. and yea i made the int isprime ,,, a bool isprime. thanks. but still i dont know how to fix… Re: Help creating an isPrime function Programming Software Development by mrnutty …[code] #include <iostream> using namespace std; bool isPrime(int number){ bool isPrimeNumber = false; //do logic here return …lt;< "Is 97 prime: " << isPrime(97) << endl; //should be true cout <<… << "Is 27 prime: " << isPrime(27) << endl; //should be false return 0; } … Re: Help creating an isPrime function Programming Software Development by mrnutty …[code] #include <iostream> using namespace std; bool isPrime(int number){ bool isPrimeNumber = false; //do logic here return …lt;< "Is 97 prime: " << isPrime(97) << endl; //should be true cout <<… << "Is 27 prime: " << isPrime(27) << endl; //should be false return 0; } … Recursive isPrime function in python Programming Software Development by birinci2012 def isPrime(num,div=2): if(num==div): return True elif(num % div == 0): return False else: return isPrime(num,div+1) Re: Help creating an isPrime function Programming Software Development by rigoalhn …;iostream> #include <iomanip> using namespace std; bool isPrime(int number){ int remainder; bool isPrimeNumber = false; cout<<…; boolalpha << "Is 5 prime : " << isPrime(number) << endl; system("pause"); return 0… Re: Recursive isPrime function in python Programming Software Development by Gribouillis Probably the worst `isPrime()` function I've ever seen. If num is above 1000000, … Help creating an isPrime function Programming Software Development by rigoalhn … helped me. I need a write a boolean function named IsPrime that takes and integer as argument and returns true if… Timing five isprime functions (Python) Programming Software Development by vegaseat Just trying to find out which of these five isprime functions is the fastest. Re: Timing five isprime functions (Python) Programming Software Development by vegaseat I guess, we all need to just google and stop posting. For some odd reason I could never get nzmath to go, all I got is a fistful of error messages. The standard Miller Rabin isprime function is plenty fast for me. It is included in the "math/big" package in Google's Go language that I use use for high speed code. Re: An isprime(n) function Programming Software Development by vegaseat … and themselves # (1 is not considered a prime number) def isprime(n): '''check if integer n is a prime''' # range starts…): if n % x == 0: return False return True # test ... print isprime(29) # True print isprime(345) # False print isprime(8951) # True [/code] Re: An isprime(n) function Programming Software Development by mawe sneekula, I don't want to sound rude, but your one-sentence-question-posts are annoying. Why don't you try to find the answer alone first? If you're stuck, post what you have tried and we will try to help you. BTW: The internet is full of isprime functions in any language you can dream of. 2 minutes of googling, that's all you need to do ;) Re: An isprime(n) function Programming Software Development by wallars 1 is not prime: [code=python] def isPrime(n): if n == 1: return 0 else: for x in … show xml "details" Programming Web Development by Simon_4 …isBuyable> <c:isPrime>false</c:isPrime> <c:isQualified…isBuyable> <c:isPrime>false</c:isPrime> <c:isQualified…isBuyable> <c:isPrime>false</c:isPrime> <c:… Syscall for printing strings won't work - MIPS assembly Programming Software Development by Jaymz … Here is my code: [CODE] .data #Data Segment isprime: .space 400 #Array size 100*sizeof(int) nl: …28 #Set up frame pointer la $a0, isprime #Load pointer to isprime and prepare argument of initialize function sw $…a0, 12($sp) #Save pointer to isprime to the stack jal initialize #Call initialize function lw…