At certain specified points in the execution sequence called sequence points, all side effects of previous evaluations shall be complete and no side effects of subsequent evaluations shall have taken place.
At certain specified points in the execution sequence called sequence points, all side effects of previous evaluations shall be complete and no side effects of subsequent evaluations shall have taken place.
很明显标准只保证，程序执行时的全部副作用，只由上一顺序点起，并在到达下一个顺序点之前发生完毕。