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Questions - c

CMake GCC can't find curl struct in included header file

I'm trying to create a library with CMake that uses libcurl but GCC is consistently failing to find certain structs and defines even though they were included. I have curl, libssl-dev, and libcurl4-op...
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ImTheSquid

c

gcc

cmake

libcurl

Votes: 0

Answers: 1

Latest Answer

I fixed the problem by installing the latest version of libcurl from source. Ubuntu 20.04 seems to have a broken version of libcurl.
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ImTheSquid

Concentric square matrix

I have coding problem to write concentric square matrix (biggest number is in the middle) For example user needs to write an matrix For example: 5 5 5 5 5 5 6 6 6 5 ...
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mr fahrenheit

c

Votes: 0

Answers: 2

Latest Answer

Would you please try the following: #include <stdio.h> int main() { int mat[100][100]; int ii[] = {0, 1, 0, -1}; // incremental numbers of i int jj[] = {1, 0, -1, 0}; ...
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tshiono

What is the official Rust guidance for interoperability with C++, in particular passing and returning structs as arguments?

I'm trying to adapt some layers of existing C++ code to be used by Rust and apparently the way is through a C API. For example, one function might return a struct as an object #pragma pack(push,4) str...
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user8143588

c++

c

rust

Votes: 0

Answers: 2

Latest Answer

extern "C" on both sides + #[repr(C)] on the Rust side + only using C-compatible types for interfacing between C++ and Rust, should work. Alternatively, see cxx and autocxx.
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Solomon Ucko

c - what is the most efficient way to copying a string?

what is the most efficient way for the cpu (benchmark way) to copy a string? I am new to c and i am currently copying a string like this char a[]="copy me"; char b[sizeof(a)]; fo...
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dn70a

c

string

loops

for-loop

benchmarking

Votes: 0

Answers: 3

Latest Answer

Don't write your own copy loops when you can use a standard function like memcpy (when the length is known) or strcpy (when it isn't). Modern compilers treat these as "builtin" functions, so...
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Peter Cordes

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