Random number generator, C++

Question

I know there is a bit of limitations for a random number generation in C++ (can be non-uniform). How can I generate a number from 1 to 14620?

Thank you.

Answer 1

The rand() function is not really the best Random generator, a better way would be by using CryptGenRandom().

This example should do do the trick:

#include 

// Random-Generator
HCRYPTPROV hProv;
INT Random() {
    if (hProv == NULL) {
        if (!CryptAcquireContext(&hProv, NULL, NULL, PROV_RSA_FULL, CRYPT_SILENT | CRYPT_VERIFYCONTEXT))
            ExitProcess(EXIT_FAILURE);
    }

    int out;
    CryptGenRandom(hProv, sizeof(out), (BYTE *)(&out));
    return out & 0x7fffffff;
}

int main() {
    int ri = Random() % 14620 + 1;
}