摘要:
显示图像失败,但是注销掉namedWindow("disp")就可以正常显示 waitKey有两个作用: 1. It waits for x milliseconds for a key press. If a key was pressed during that time, it returns 阅读全文
摘要:
using System; namespace StringApplication { class StringProg { static void Main(string[] args) { string str = "2018-08-07 09:50"; Console.WriteLine(str); string substr = str.Substring(10); ... 阅读全文