#include <iostream>
#include <cstring>
#include <sstream>
#include <openssl/sha.h>

class Entity{
    float x,y;
public:
    void move(float ax,float ay){
        x +=ax;
        y += ay;
    }
    Entity(){
        y = x = 0;
    }
};

int main(){
    SHA256_CTX  sha;
    SHA256_Init(&sha);
    unsigned char md[SHA256_DIGEST_LENGTH];
    Entity e;
    SHA256_Update(&sha,&e, sizeof(Entity));
    SHA256_Final(md,&sha);
    std::stringstream ss;
    for(int i = 0; i < SHA256_DIGEST_LENGTH; i++)
        ss << std::hex << (int)md[i];
    std::cout << ss.str() << std::endl;
    return 0;
}