Thread: reandom numbers

Code:

#include<iostream>
using namespace std;
int main()
{
int a;
a=random;
cout<<a<<endl;
return 0;
}

i want to learn how to do random numbers i know that is completly wrong but how would i make a=a random number?

try searching the board (http://cboard.cprogramming.com/showt...threadid=47035), but i'll write some random int generating code...

Code:

#include <iostream>
#include <conio.h>
#include <cstdlib>
#include <ctime>

int main()
{
     srand(clock());   //to make the random number random
     int randInt=rand();   //a large random int

     std::cout<<randInt<<std::endl
           <<"Press any key to continue . . . ";
     getch();

     return 0;
}

that helps how about some errors?

edit: the 'c' is lowercase in clock()

check my last post

Originally posted by makveli
u dont have a compiler in front of u wat about behind you?

Don't be such a douche-bag when someone is trying to help you.

Note: If you don't feel like including <ctime> and you have <windows.h> included, i.e. you're writing a non-console Windows app, GetTickCount() should suffice instead of clock().

Here's what I use to do random numbers:

---***---

include <iostream.h>
include <stdlib.h>
include <time.h>

Code:

int main ()
{
    int num;
    double flt;

    // seed the random number generator
    srand (unsigned (time (NULL) ) );

    // a random integer from 0 to 10
    int = rand() % 11;
    cout << "integer, 0 to 10 --> " << int << endl;

    // a random float from 0 to 10
    flt = rand() / double (RAND_MAX) * 10;
    cout << "float, 0 to 10 --> " << flt << endl;


    return 0;
}

---***---

The function rand() simply returns an integer from 0 to a constant RAND_MAX.


---[Red Haze]---

the program i gave you is pretty much as simple as you can get, but here's something even easier (but much less random):

Code:

#include <iostream>
#include <cstdlib>

using std::cin;
using std::cout;
using std::endl;

int main()
{
     srand(rand());   //to make the random number random... with a random number
     int randInt=rand();   //a large random int

     cout<<randInt<<endl
           <<"Press any key to continue . . . ";
     cin.get;

     return 0;
}