[RESOLVED] rand_s

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

Code:

---

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 );
    }
}

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

Thanks in advance.

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

Thanks.

This is the code:

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

:wave: