Using Srand

[Dexterr]

Hello guys, i need some help using srand, the reference page is not very clear how to work it out specifically as how i want to, specifically, i just want to generate a random number between 6 and 10, any help or to guide me to another topic where i can get some help on this, thanks in advance.

[keskiverto]

1. The srand merely initializes the generator to specific state. It is called only once in the program.

2. The rand() returns a random number. Its documentation has IMHO good explanation: http://www.cplusplus.com/reference/cstdlib/rand/

3. The rand & srand are deprecated. You should learn http://www.cplusplus.com/reference/random/

[MiiNiPaa]

int random(int low, int high)
{
    return std::rand() % (high - low + 1) + low;
}

int main()
{
    /* setting up RND */
    std::srand(std::time(nullptr));
    
    /* using out function */
   int x = random(6, 10);
}

However you should consider getting rid of bad C library randomizer and use C++ ones:

#include <random>
int main()
{
    std::mt19937 rng(std::time(nullptr));
    std::uniform_int_distribution<> dis(1, 6);

    int i = dis(rng);
}

[Dexterr]

Thank you very much for your input, however, i did try using the C++ one immediately, but, every time im including , #include <random> im getting an error

" /** @file bits/c++0x_warning.h
* This is an internal header file, included by other library headers.
* Do not attempt to use it directly. @headername{iosfwd}
*/

#ifndef _CXX0X_WARNING_H
#define _CXX0X_WARNING_H 1

#ifndef __GXX_EXPERIMENTAL_CXX0X__
#error This file requires compiler and library support for the \
ISO C++ 2011 standard. This support is currently experimental, and must be \
enabled with the -std=c++11 or -std=gnu++11 compiler options.
#endif

#endif "

and im using CodeBlocks latest version, with MinGW compiler, so thats a different problem i assume .. :(

[MiiNiPaa]

You have not enabled C++11 mode.
Settings → Compiler... → check Have g++ follow the C++11 ISO C++ language standard

[Dexterr]

oh man ... Thanks very much for your time :)