Recent questions tagged C

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c - How do I check if an integer is even or odd using bitwise operators

How do I check if an integer is even or odd using bitwise operators See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - What is the role of libc(glibc) in our linux app?

When we debug a program using gdb, we usually see functions with strange names defined in libc(glibc?). ... difference between libc and glibc? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - unix domain socket VS named pipes?

After looking at a unix named socket and i thought they were named pipes. I looked at name pipes and didnt see ... else if i have needs)? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - Warning/error "function declaration isn't a prototype"

I have a library I created, File mylib.c: #include <mylib.h> int testlib() { printf("Hello, World! ") ... way to declare a function prototype? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - Zombie process vs Orphan process

A Zombie is created when a parent process does not use the wait system call after a child dies to read ... the greater application or system? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - When should I use perror("...") and fprintf(stderr, "...")?

Reading the man pages and some code did not really help me in understanding the difference between - or better, when ... (stderr, "..."). See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - strcpy vs. memcpy

What is the difference between memcpy() and strcpy()? I tried to find it with the help of a program but both are giving ... is [sa], t is [sa] See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - How to build x86 and/or x64 on Windows from command line with CMAKE?

One way to get cmake to build x86 on Windows with Visual Studio is like so: Start Visual Studio Command prompt for ... does it from in the IDE) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - Difference between int32, int, int32_t, int8 and int8_t

I came across the data type int32_t in a C program recently. I know that it stores 32 bits, but don't int ... int32_t, int8 and int8_t in C? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - Why can a string be assigned to a char* pointer, but not to a char[] array?

Can someone explain why this works with the pointer: char * str1; str1 = "Hello1"; str1 = "new string"; // but ... = "hello"; str3 = "hello"; See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - How exactly does tail recursion work?

I almost understand how tail recursion works and the difference between it and a normal recursion. I only don't ... 't make sense for me. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - GDB corrupted stack frame - How to debug?

I have the following stack trace. Is it possible to make out anything useful from this for debugging? Program ... the code here. Apologies. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - How is i==(20||10) evaluated?

#include <stdio.h> int main(void) { int i=10; if(i==(20||10)) printf("True"); else printf("False") ... explain to me how does this program work? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - cs50 pset4 Recover - why does writing entire file to memory fail check50?

I'm working on Recover and am wondering if there's something fundamentally flawed with my approach. The walkthrough ... it did the same thing. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - Printing a "triangle" of asterisks

The program I am supposed to write is supposed to print the triangle in the following manner: If the number of rows is 2 ... } printf(" "); } } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - converting an array of characters to a const gchar*

I've got an array of characters which contains a string: char buf[MAXBUFLEN]; buf[0] = 'f'; buf[1] = ... argument. Can anybody help me out? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - Is it possible to import/run object files in eclipse?

Our professor made available object files of a previous assignment that I wasn't able to complete. This previous ... with those object files? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - Unexpected Result in Macro

I have a simple program to calculate the volume of a cube. It runs fine, but the result I get is wrong. It comes out ... ("Y is %d ", y); } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - How to convert an unsigned int to a float?

I need to build a function that returns the bit-level equivalent of (float)x without using any floating data ... code? Thank you all again! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - segmentation fault for 2D arrays

I want to define a 2D array of very big size. But it is giving me segmentation fault? #include < ... memory initialization? Thanks in advance See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - How to avoid "multiple definition" error for global constants?

I'm writing a C program using the Windows API. Each major function has its own file, and there is one ... there any solution to this problem? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - I m trying to sort the node by score. I do not know what error i am having

#include<stdio.h> #include<stdlib.h> #include<conio.h> struct student{ char firstname[20]; char lastname[20]; double ... all my code is wrong? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - Call menu function in another function

I'm trying to call menu function in the main function and let it prompt until the user decides to quit, ... Incorrect Part Thanks in advance!!! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - Is this flowchart right?

I've developed a C program that can calculate the value of a sin function using Taylor series expansion. ... knowledge in drawing flowcharts. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - Segfault on movq instruction?

Consider the following short program. int main(){ asm("movq 0x5F5E100, %rcx;" "startofloop: ; " "sub 0x1, %rcx ... startofloop; # 0 "" 2 #NO_APP See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - How to change wchar.h to make wchar_t the same type as wint_t?

wchar_t is defined in wchar.h Currently, if the developers want to use only wchar_t, they can not do ... namespace. */ __USING_NAMESPACE_STD(tm) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - Dealing with data serialization without violating the strict aliasing rule

Often in embedded programming (but not limited to) there is a need to serialize some arbitrary struct in order ... be some other approaches? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - Linking against a static library

gcc Version: 4:4.4.4-1ubuntu2 GNU Make 3.81 I have the following library called net_api.a and some header ... ' What is going wrong here? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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