command-line-arguments

How to read from files in argv or stdin if none are given?

一世执手 提交于 2020-08-17 11:06:30
问题 I have a program that calculates a lottery tickets (this tickets are in a file.txt), and writes the winners tickets in another file. I have a subfunction called evaluate_tickets(file, lottery_numers, winner....) In shell I write: ./program arg1 arg2... (arg1, arg2 are text files i.e. file.txt) But now, I want to do ./program < file.txt . The problem is that I don't know how to send the parameter "file" of evaluate_tickets because I receive information by stdin. 回答1: Define a stream pointer

commandline argument parameter limitation

不打扰是莪最后的温柔 提交于 2020-08-01 06:35:30
问题 Language: C# I have to pass a huge string array (built dynamically) as an argument to run an exe. I am thinking of acheiving it by the below 2 ways. But I am not feeling confident. I can create it as one string delimited by spaces. I can invoke the exe through Process.Start. Hence the running child process considers the space and holds as a string array. However I am unsure about the string array limitation. Suppose if my string array count exceeds more than 10,000 I can create it as one

commandline argument parameter limitation

别等时光非礼了梦想. 提交于 2020-08-01 06:35:21
问题 Language: C# I have to pass a huge string array (built dynamically) as an argument to run an exe. I am thinking of acheiving it by the below 2 ways. But I am not feeling confident. I can create it as one string delimited by spaces. I can invoke the exe through Process.Start. Hence the running child process considers the space and holds as a string array. However I am unsure about the string array limitation. Suppose if my string array count exceeds more than 10,000 I can create it as one

Pass command-line arguments to WiX custom action

爱⌒轻易说出口 提交于 2020-07-21 03:25:25
问题 We have a desktop application installed through a windows installer (msi), and we want to add a custom action that relaunches the .exe when we have pass LAUNCH_APP=1 to the cmd . So I have a vbs script that launch a bat file that launch install the msi (major upgrade): vbs script: Set WshShell = CreateObject("WScript.Shell") Const TemporaryFolder = 2 Dim fso: Set fso = CreateObject("Scripting.FileSystemObject") Dim tempFolder: tempFolder = fso.GetSpecialFolder(TemporaryFolder) WshShell.Run