Common random number generator of iOS and Android

Question

I need a Random Number Generator that produces same sequence of numbers both in iOS and Android if we give the same Seed in both.

I tried the rand() function with the srand(1000). But it gave different outputs. Then I tried mersenne twister. But that too gave difference sequence for same seed.

Could any one please help me on this.

I am using cocos2d-x for my development.

Answer 1

You can just write your own random number generator like this. The quality is low but will suit for most of the purpose.

// RAND_MAX assumed to be 32767.
static unsigned long int next = 1;
void srand(unsigned int seed) { next = seed; }
int rand(void) {
    next = next * 1103515245 + 12345;
    return (unsigned int)(next/65536) % 32768;
}