i m want to learn c++
i have a problem
i dont know how to use rand()
can u help me ?
randomize how to use?
i m want to learn c++
i have a problem
i dont know how to use rand()
can u help me ?
randomize() is one of the functions that will seed a random number generator, like rand(). You should use randomize() just once in your program, but you may use rand() as often as you wish. To generate a random integer you would do this:
int main()
randomize();
long x
x = rand();
cout << x;
return 0;
Of course you will need to include all appropriate headers.
There are 2 approaches to this.....
1) read the damn frequently asked questions....
2) the functions you need are srand() to seed the random number generator and rand() to give you a random number between 0 and RAND_MAX.You will find these functions in <cstdlib> or <stdlib.h>
so...
Code:#include<iostream> #include<cstdlib> #include<ctime> using namespace std; int main() { // seed the random num gen. with system time for unique randomness srand((unsigned)time(NULL)); // now a loop for(int i=0;i<10;i++) { //get a random number between 1 and 100. //we use modulus to get a number in the desired range. //+1 because %100 returns 0-99 int randomnum=rand() %100 +1; cout<<randomnum<<endl; } return 0; }
Free the weed!! Class B to class C is not good enough!!
And the FAQ is here :- http://faq.cprogramming.com/cgi-bin/smartfaq.cgi
