Search DaniWeb - srand()

Re: Trying to animate sprite using DirectX9 4 Weeks Ago by Pavel_11 Hello, it is unneccessarily to use right movex or leftmovex , because it is to much variables. You should to use one variable movex to make it with minus or plus sign in your update function; by pressing left or right keys; because the one thing which is changable is a picture; I mean in global sense; variables like leftx, right x should be one… Re: srand function 16 Years Ago by Narue …url] will give you an idea of how rand and srand work together, but the simple answer is that you …should call srand once: [code=c] #include <stdio.h> #include … + rand() % 10; } int main ( void ) { int i; /* Call srand only once */ srand ( (unsigned)time ( NULL ) ); for ( i = 0; i < 10… Re: what is srand? 13 Years Ago by Ancient Dragon …numbers, which is the default if the program never calls srand(). To get rand() to generate a different set of …to call time() function from time.h, like this: [icode]srand( time(0) );[/icode] you might have to typecast the … to unsigned int if your compiler complains about it. What srand() does not do: that function does NOT set the lower… Re: Using srand() and generating characters 12 Years Ago by Ancient Dragon srand() is used to seed the random number generator [icode]srand( time(0));[/icode] calling time() will make srand() seed with a different number each time the program is run. There is no such thing as an infinite character. Re: rand vs srand 14 Years Ago by NathanOliver srand() seeds the rand() function. a good way to get a … should be used as follows for general uses [code=c++] //... srand(time(NULL)); value = rand() % 365 + 1; //... [/code] you will need… Random Numbers Help 17 Years Ago by s.j.macleod { srand((unsigned)time(0)); int random_integer; int lowest=-10, highest=10; … Re: shuffling and dealing cards program 13 Years Ago by MattyRobot srand sets the seed for the random number generator (it takes the number you put in and passes it through a logarithm which generates a pseudo(fake, not totaly random) set of numbers). setting it by time(), you almost never get the same seed twice and so GREATLY improves randomness. Re: Call for Help 14 Years Ago by Ancient Dragon srand() doesn't return a value. All that function does is … the random number generator. What you want is rand(), not srand(). srand() should be called only once at the beginning of the… random number. [code] #include <time.h> int main() { srand( time(0) ); int n = rand(); } [/code] Note that rand() returns… Re: can not pass a random number to cout 14 Years Ago by jonsca srand [B]is[/B] the seeding function. You do not need … Re: random 11 Years Ago by ravenous `srand` doesn't generate a random number, it sets the seed … Re: C++ Random Library 17 Years Ago by Ancient Dragon >> srand((unsigned) time(&t)); you don't need the argument to time() [code] srand((unsigned) time(NULL)); [/code] >>#if defined(_MSC_VER) delete the above line and the corresponding #endif. time functions and rand functions are both standard c/c++ library functions that are supported by most c or c++ compilers. Re: Correction 15 Years Ago by h3xc0de srand((unsigned int)time(NULL)); Re: conditional statement issue 14 Years Ago by Salem > srand((unsigned)time(0)); Run at full speed, how much time … of constants, therefore your code always does the same thing. srand() should be called [B]ONCE ONLY[/B] at the beginning… Re: Call for Help 14 Years Ago by Aia srand() returns void. You are trying to assign that void return to a float. No, no! [CODE]srand( (unsigned)time(NULL) );[/CODE] That's all you need before you call rand() Re: ERROR time_t to unsighned int 11 Years Ago by Sky Diploma srand( static_cast<unsigned int>( time( NULL ) ) ); Just to add up on the above point. Maybe its time for the static_cast to kick in and try a safe conversion :) Re: problem with g++ compiler 16 Years Ago by WolfPack srand is a standard C++ function. So g++ also supports it. What is the problem you are getting? Re: Rand function not working very well. 14 Years Ago by mrnutty >>srand(unsigned(time(NULL))); You only need to do this once. Put that statement inside main, and just call it once. It only needs to be called once. Re: Hi I really needed help for this number guessing game 13 Years Ago by +_+man srand(time(NULL)); it can also be used Re: Simple C program help please? 10 Years Ago by Ancient Dragon srand() should only be called once during the lifetime of the … Re: Random Number 17 Years Ago by Ancient Dragon srand() seeds the random number generator, you should call srand() one time only and near the top of main(). Most of us use the time() function as the paramter to srand() [code] int main() { srand(time(0)); } [/code] Re: C++ Random Code Generator 11 Years Ago by vijayan121 > `srand(time(NULL));` Not a good idea to reseed the linear … function is called. Perhaps something like: `static int seed_once = ( std::srand( std::time(0) ), 0 ) ;` instead. Or better still, just document… std::rand() is used; and expect `main()` to call `std::srand()`. C++11: #include <string> #include <random>… Re: Math Tutoring Program 17 Years Ago by sugantha srand() takes a seed as an argument and in this case...the system's time is the seed which naturally keeps varying ....so you get a true random number simulation....there are so many other algos to generate random numbers....you can refer a good algorithm text....place srand(time(NULL)) anywhere before the rand() function Re: Random number generation 16 Years Ago by Narue >srand(time()); 1) You forgot to include time.h, which hides #… seed ); unsigned time_seed ( void ); int is_done ( void ); int main ( void ) { srand ( time_seed() ); do { double r = uniform_deviate ( rand() ) * RANGE; printf ( "My… Re: need advices for good programming practise 13 Years Ago by mrnutty srand and rand are in [i]cstdlib[/i]. That is what … library for the time function to generate different seed for srand every run. And the difference between "3" and… Re: Generating Latin Squares 14 Years Ago by jonsca srand(time(0)) goes before rand() and then you don't … Re: Rand() error 14 Years Ago by Dave Sinkula srand. once. at the beginning. Re: Console Pong! 13 Years Ago by helpingdeed srand( static_cast<unsigned (time(NULL)) );// its also work fine plz if u can help me a little and tell me how can i cout<<"asdfjkl"<<endl;// if space key is press not enter thank you Re: Random number 10 Years Ago by chubbyy.putto srand( (unsigned int) time(0)); for (int index = 0; index < … Re: Randomization in PHP 3 Years Ago by Reverend Jim srand ([ int $seed ] ) : void Seeds the random number generator with seed or with a random value if no seed is given. sRand() 13 Years Ago by crapgarden … what the < > operators are doing? [CODE]srand(static_cast<unsigned int>(time(0))); [/CODE] I realize… an unsigned int, but why not do this: [CODE]srand(unsigned int = time(0));[/CODE] I realize my questions…;ctime> using namespace std; int main() { //Roll 1 srand(static_cast<unsigned int>(time(0))); //seed random number…