Hello, Can someone help me fix the error please

#include

#include

#include

#include

int main()

{

const int SIZE = 4096;

const char *name = "OS";

const char *message_0 = "Hello";

const char *message_1 = "world!";

int fd;

char *ptr;

fd = shm_open(name, O_CREAT | O_RDWR, 0666);

ftruncate(fd, SIZE);

ptr = (char * )

mmap(0, SIZE, PROT_READ, MAP_SHARED, fd, 0);

sprintf(ptr, "%s", message_0);

ptr += strlen(message_0);

sprintf(ptr, "%s", message_1);

ptr += strlen(message_1);

return 0;

}