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2年10月17天

MFC中Arc与ArcTo的区别

Arc与ArcTo函数皆为MFC下的绘弧函数,实际就是从一个椭圆中截取一部分下来而形成的。BOOL ArcTo( LPCRECT lpRect, POINT ptStart, POINT ptEnd);其中lpRect为弧形所属的矩形区域,椭圆就是根据这个矩形而生成的。ptStart,ptEnd作用是用来指定弧形的开始点/结束点,真实的弧形开始点/结束点就是ptStart/pt

451. Sort Characters By Frequency。

Given a string, sort it in decreasing order based on the frequency of characters.Example 1: Input: “tree” Output: “eert” Explanation: ‘e’ appears twice while ‘r’ and ‘t’ both appea

PT环境下postgresql.conf配置参考

# -----------------------------# PostgreSQL configuration file# -----------------------------## This file consists of lines of the form:## name = value## (The "=" is optional.) Whitespace may be used. Comments are introduced with# "#&