ref: 66ece20b08a2c9fc5ee1ae0bd8c3f2dc2042d168 dir: /tests/0037-assignop.c/
int main() { int x; x = 0; x += 2; x += 2; if (x != 4) return 1; x -= 3; if (x != 1) return 2; return 0; }