Reading from pipe goes wrong

I want to read the integer from the pipe and then print it, but everytime it prints garbage value. Someone that can help me out?

int main()
{
    int pid1 = fork();

    int fd1[2];
    pipe(fd1);

    if (pid1 == 0) // Child process
    {
        int x;
        close(fd1[1]);
        read(fd1[0], &x, sizeof(int));
        printf("I'm the First Child and I received: %d\n", x);   // <--- Here it prints garbage value
        close(fd1[0]);
    }

    else // Parent process
    {
        int x = 5;
        close(fd1[0]);
        write(fd1[1], &x, sizeof(int));
        close(fd1[1]);
    }
}

I had to fork() after creating the pipes. So the code looks like this:

int main()
{
    int fd1[2];
    pipe(fd1);

    int pid1 = fork();

    if (pid1 == 0) // Child process
    {
        int x;
        close(fd1[1]);
        read(fd1[0], &x, sizeof(int));
        printf("I'm the First Child and I received: %d\n", x); 
        close(fd1[0]);
    }

    else // Parent process
    {
        int x = 5;
        close(fd1[0]);
        write(fd1[1], &x, sizeof(int));
        close(fd1[1]);
    }
}