Recent questions tagged C

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c - Not checking close()'s return value: how serious, really?

Linux's "man close" warns (SVr4, 4.3BSD, POSIX.1-2001): Not checking the return value of close() is a common but ... , you lost some data. "); ? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - Intel x86 to ARM assembly conversion

I am currently learning ARM assembly language; To do so, I am trying to convert some x86 code (AT&T Syntax) to ... ARMv7 Processor rev 4 (v7l) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - How to display an image in full screen borderless window in openCV

I want to display an image in OpenCV in a full screen borderless window. In other words, only the image ... | WS_EX_TOPMOST | WS_POPUP); See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - How do find the longest path in a cyclic Graph between two nodes?

I already solved most the questions posted here, all but the longest path one. I've read the Wikipedia article ... checking all these paths... See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - Best way to do RAW socket programming involving Java

I have some existing C code that uses ICMP raw sockets to do Ping and I need to use this code in Java as ... () could be used as well. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - Which components use the locale variables?

I have read that every process has a set of locale variables associated with it. For example, these are the ... of the LANG locale variable. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - Calling convention for function returning struct

For the following C code: struct _AStruct { int a; int b; float c; float d; int e; }; typedef struct _AStruct AStruct; ... this ;;;;;;;;;;;;;; See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - realpath() without resolving symlinks?

I already read about realpath(), but is there a function that I can pass a base directory and a filename that ... /passwd" => "/etc/passwd" See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - Python extension module with variable number of arguments

I am trying to figure out how in C extension modules to have a variable (and maybe) quite large number of arguments to a ... 5, 6, 7, 8, 9] See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - How to execute finish and then another command from inside commands?

This is a reduced example of the structure of my code: void increment(int j); int main() { int i = 0 ... print i right after any increment call? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - Win32 API command line arguments parsing

I'm writing Win32 console application, which can be started with optional arguments like this: app.exe / ... contain some arguments parser? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - Code before the first 'case' in a switch-statement

In C it's possible to write code before the first case label. Are there any cases for which it is useful to do this or ... a); } case 0: ... } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - How to get Ctrl, Shift or Alt with getch() ncurses?

How to get Ctrl, Shift or Alt with getch() ncurses ? I cannot get it work to get Ctrl, Shift or Alt with ... Do I miss something in the man ? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - Is there a standard way to do an fopen with a Unicode string file path?

Is there a standard way to do an fopen with a Unicode string file path? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - Why doesn't lldb forward my environment variable anymore?

I'm working on a patch for FFmpeg and need to debug my code. I'm loading an external library, and in order to test ... This is on OS X 10.11.1. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - Why does time(time_t *) function both return and set the by-ref?

I've always been curious, why does the time(time_t *) function both return a time_t, and set the time to the ... 't that just make it slower? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - Is it valid to have multiple signal handlers for same signal?

I have two shared libraries linked to my test application. Both of the libraries have signal handlers for SIGINT. ... generate a SIGINT signal? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - GCC: accuracy of strict aliasing warnings

I'm trying to check some of my code for strict aliasing violations, but it looks like I've missed something ... the rule when generating code? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - gdb can't access memory address error

here is my disas code: 0x0804844d <+0>: push %ebp 0x0804844e <+1>: mov %esp,%ebp 0x08048450 <+3>: and ... Hope you can help. Thank you. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - prevent gcc from removing an unused variable

In our source files we usually have a version string like that: static const char srcvers[] = "VERSION/foo ... touch thousands of source files. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - scanf() skip variable

In C, using scanf() with the parameters, scanf("%d %*d", &a, &b) acts differently. It enters value for just one variable ... ("%d %*d", &a, &b); See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - Why must int pointer be tied to variable but not char pointer?

I am not sure if I worded the question correctly, but here it is spelled out: char * cp = "this ... insight would be appreciated! Thanks! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - How to write system calls on debian/ubuntu

I am trying to write a system call of my own. It would just return the current time. I know the concept of what ... i compile it with gcc. Why? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - Winapi: Get the process which has specific handle of a file

Currently I have a software which has a file filter driver, during installation of software the driver is started ... >) and with cygwin? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - Why break cannot be used with ternary operator?

while(*p!='' && *q!='') { if(*p==*q) { p++; q++; c++; } else break; } I ... gcc compiler gives this error: expected expression before break' See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - How to find the universal sink of a directed graph with an adjacency-matrix representation

I'm working on an excercise (self-study): "Show how to determine whether a directed graph G contains a universal ... .g. using too many breaks) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - Modifying head pointer in a linked list

I am having trouble understanding this code. All I really need is to modify the head pointer to point to the ... updates head return true; } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - start time of a process on linux

How to find a process start time on ubuntu linux machine using c language. In linux there is /proc/[pid]/stat ... because it is in jiffies unit. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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