小编Kun*_*dan的帖子

在32位系统上.

1. std::vector<char>::max_size()返回2 ³² -1,大小为char-1字节
2. std::vector<int>::max_size()返回2 ³⁰ -1,大小为int-4字节
3. std::vector<double>::max_size()返回2 ²⁹ -1,大小为double- 8字节

任何人都可以告诉我max_size()取决于什么？

max_size()如果它在64位系统上运行,它的返回值是多少？

例如我的代码如下。

void main()

{

       SYSTEMTIME LocalTime_Start = { 0 };

        GetLocalTime( &LocalTime_Start );

        SYSTEMTIME LocalTime_End = { 0 };
        // Some program Statements

         GetLocalTime( &LocalTime_End );

         // Now i want difference of two i.e.
         // can i do as following
         SYSTEMTIME localTime_diff = LocalTime_End - LocalTime_Start;
         // guys please let me know how to achieve that asap...thanks a lot in advance
}