[RESOLVED] rand_s

[juanpast]

From MSDN: http://msdn.microsoft.com/en-us/libr...(v=vs.80).aspx

int main( void )
{
    int             i;
    unsigned int    number;
    double          max = 100.0;
    errno_t         err;

    // Display 10 random integers in the range [ 1,10 ].
    for( i = 0; i < 10;i++ )
    {
        err = rand_s( &number );
        if (err != 0)
        {
            printf_s("The rand_s function failed!\n");
        }
        printf_s( "  %u\n", (unsigned int) ((double)number /
                          (double) UINT_MAX * 10.0) + 1);
    }

    printf_s("\n");

    // Display 10 random doubles between 0 and max.
    for (i = 0; i < 10;i++ )
    {
        err = rand_s( &number );
        if (err != 0)
        {
            printf_s("The rand_s function failed!\n");
        }
        printf_s( "  %g\n", (double) number / 
                          (double) UINT_MAX * max );
    }
}

But: what about if I want generate aleatory numbers between 123 and 256?? (for example).

Thanks in advance.

[GCDEF]

Use the modulus operator to give you the range, then add the starting value to the generated number.

[juanpast]

Thanks.

This is the code:

inline int Aleatorio(int nMin, int nMax) {	
	UINT nNumero = 0;
	rand_s(&nNumero);	
	UINT n_s = nMin + nNumero % (nMax + 1 - nMin);
	return n_s;
}

Best regards, Toño