[Problem] Pythagorean triplet

[ademclk]

Pythagorean triplet

Pythagorean triplet is a set of three natural numbers where a < b < c.

$a^2 + b^2 = c^2$

There is exactly one Pythagorean triplet for which $a + b + c = 1000$.

Find a, b and c and print these numbers out.

[onurbbr]

@Legoeggolas Your code doesn't work on g++ and clang. Update the project with your working code.

[Legoeggolas]

@Legoeggolas Your code doesn't work on g++ and clang. Update the project with your working code.

Double checked, works just fine for me.

What problems are you facing with the code?
I have intentionally commented out an include directive in the header file, maybe that is the cause of your issue?

[onurbbr]

@Legoeggolas Your code doesn't work on g++ and clang. Update the project with your working code.

Double checked, works just fine for me. What problems are you facing with the code? I have intentionally commented out an include directive in the header file, maybe that is the cause of your issue?

It's not my issue. I tried my linux machines. It's not working.

[onur@archlinux pythagorean_triplet]$ clang solution.cpp
/usr/bin/ld: /usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/12.2.0/../../../../lib64/Scrt1.o: in function _start': /build/glibc/src/glibc/csu/../sysdeps/x86_64/start.S:103: undefined reference to main' clang-14: error: linker command failed with exit code 1 (use -v to see invocation)

More detailed info:
[onur@archlinux pythagorean_triplet]$ clang solution.cpp -v
clang version 14.0.6
Target: x86_64-pc-linux-gnu
Thread model: posix
InstalledDir: /usr/bin
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-pc-linux-gnu/11.3.0
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-pc-linux-gnu/12.2.0
Found candidate GCC installation: /usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/11.3.0
Found candidate GCC installation: /usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/12.2.0
Selected GCC installation: /usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/12.2.0
Candidate multilib: .;@m64
Candidate multilib: 32;@m32
Selected multilib: .;@m64
Found CUDA installation: /opt/cuda, version
"/usr/bin/clang-14" -cc1 -triple x86_64-pc-linux-gnu -emit-obj -mrelax-all --mrelax-relocations -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name solution.cpp -mrelocation-model pic -pic-level 2 -pic-is-pie -mframe-pointer=all -fmath-errno -ffp-contract=on -fno-rounding-math -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -tune-cpu generic -mllvm -treat-scalable-fixed-error-as-warning -debugger-tuning=gdb -v -fcoverage-compilation-dir=/mnt/SSD/Projects/GitHub/callofcode/challenges/C++/pythagorean_triplet -resource-dir /usr/lib/clang/14.0.6 -internal-isystem /usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/12.2.0/../../../../include/c++/12.2.0 -internal-isystem /usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/12.2.0/../../../../include/c++/12.2.0/x86_64-pc-linux-gnu -internal-isystem /usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/12.2.0/../../../../include/c++/12.2.0/backward -internal-isystem /usr/lib/clang/14.0.6/include -internal-isystem /usr/local/include -internal-isystem /usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/12.2.0/../../../../x86_64-pc-linux-gnu/include -internal-externc-isystem /include -internal-externc-isystem /usr/include -fdeprecated-macro -fdebug-compilation-dir=/mnt/SSD/Projects/GitHub/callofcode/challenges/C++/pythagorean_triplet -ferror-limit 19 -stack-protector 2 -fgnuc-version=4.2.1 -fcxx-exceptions -fexceptions -fcolor-diagnostics -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /tmp/solution-f8d086.o -x c++ solution.cpp
clang -cc1 version 14.0.6 based upon LLVM 14.0.6 default target x86_64-pc-linux-gnu
ignoring nonexistent directory "/usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/12.2.0/../../../../x86_64-pc-linux-gnu/include"
ignoring nonexistent directory "/include"
#include "..." search starts here:
#include <...> search starts here:
/usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/12.2.0/../../../../include/c++/12.2.0
/usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/12.2.0/../../../../include/c++/12.2.0/x86_64-pc-linux-gnu
/usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/12.2.0/../../../../include/c++/12.2.0/backward
/usr/lib/clang/14.0.6/include
/usr/local/include
/usr/include
End of search list.
"/usr/bin/ld" -pie --eh-frame-hdr -m elf_x86_64 -dynamic-linker /lib64/ld-linux-x86-64.so.2 -o a.out /usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/12.2.0/../../../../lib64/Scrt1.o /usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/12.2.0/../../../../lib64/crti.o /usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/12.2.0/crtbeginS.o -L/usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/12.2.0 -L/usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/12.2.0/../../../../lib64 -L/lib/../lib64 -L/usr/lib/../lib64 -L/lib -L/usr/lib /tmp/solution-f8d086.o -lgcc --as-needed -lgcc_s --no-as-needed -lc -lgcc --as-needed -lgcc_s --no-as-needed /usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/12.2.0/crtendS.o /usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/12.2.0/../../../../lib64/crtn.o /usr/bin/ld: /usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/12.2.0/../../../../lib64/Scrt1.o: in function _start': /build/glibc/src/glibc/csu/../sysdeps/x86_64/start.S:103: undefined reference to main'
clang-14: error: linker command failed with exit code 1 (use -v to see invocation)

[Legoeggolas]

@onurbbr
It is because my code is not supposed to run as-is.

You're supposed to either include the header (where a function is provided) and compile with that, or uncomment the main function (and necessary includes) in the header and source files.

[onurbbr]

@onurbbr It is because my code is not supposed to run as-is.

You're supposed to either include the header (where a function is provided) and compile with that, or uncomment the main function (and necessary includes) in the header and source files.

Activating main does not change the result. This time I'm getting a namespace error. When I enable Namespace, the linker cannot link the code you wrote.

[onurbbr]

[onur@archlinux pythagorean_triplet]$ clang solution.cpp
solution.cpp:37:10: error: no member named 'cout' in namespace 'std' std::cout << "The values are: "; ~~~~~^ solution.cpp:39:14: error: no member named 'cout' in namespace 'std' std::cout << val << " "; ~~~~~^ solution.cpp:42:10: error: no member named 'cout' in namespace 'std' std::cout << std::endl; ~~~~~^ solution.cpp:42:23: error: no member named 'endl' in namespace 'std' std::cout << std::endl; ~~~~~^ 4 errors generated.

When I enable std and iostream it gives another linker error.

[onur@archlinux pythagorean_triplet]$ clang solution.cpp
/usr/bin/ld: /tmp/solution-aaf7f3.o: in function main': solution.cpp:(.text+0x1bf): undefined reference to std::cout' /usr/bin/ld: solution.cpp:(.text+0x1cb): undefined reference to std::basic_ostream<char, std::char_traits<char> >& std::operator<< <std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&, char const*)' /usr/bin/ld: solution.cpp:(.text+0x22a): undefined reference to std::cout' /usr/bin/ld: solution.cpp:(.text+0x22f): undefined reference to std::ostream::operator<<(int)' /usr/bin/ld: solution.cpp:(.text+0x23e): undefined reference to std::basic_ostream<char, std::char_traits<char> >& std::operator<< <std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&, char const*)' /usr/bin/ld: solution.cpp:(.text+0x256): undefined reference to std::cout' /usr/bin/ld: solution.cpp:(.text+0x25d): undefined reference to std::basic_ostream<char, std::char_traits<char> >& std::endl<char, std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&)' /usr/bin/ld: solution.cpp:(.text+0x262): undefined reference to std::ostream::operator<<(std::ostream& (*)(std::ostream&))' /usr/bin/ld: /tmp/solution-aaf7f3.o: in function __cxx_global_var_init': solution.cpp:(.text.startup+0xc): undefined reference to std::ios_base::Init::Init()' /usr/bin/ld: solution.cpp:(.text.startup+0x13): undefined reference to std::ios_base::Init::~Init()' clang-14: error: linker command failed with exit code 1 (use -v to see invocation)

Error details (--verbose)
[onur@archlinux pythagorean_triplet]$ clang solution.cpp -v
clang version 14.0.6 Target: x86_64-pc-linux-gnu Thread model: posix InstalledDir: /usr/bin Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-pc-linux-gnu/11.3.0 Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-pc-linux-gnu/12.2.0 Found candidate GCC installation: /usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/11.3.0 Found candidate GCC installation: /usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/12.2.0 Selected GCC installation: /usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/12.2.0 Candidate multilib: .;@m64 Candidate multilib: 32;@m32 Selected multilib: .;@m64 Found CUDA installation: /opt/cuda, version "/usr/bin/clang-14" -cc1 -triple x86_64-pc-linux-gnu -emit-obj -mrelax-all --mrelax-relocations -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name solution.cpp -mrelocation-model pic -pic-level 2 -pic-is-pie -mframe-pointer=all -fmath-errno -ffp-contract=on -fno-rounding-math -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -tune-cpu generic -mllvm -treat-scalable-fixed-error-as-warning -debugger-tuning=gdb -v -fcoverage-compilation-dir=/mnt/SSD/Projects/GitHub/callofcode/challenges/C++/pythagorean_triplet -resource-dir /usr/lib/clang/14.0.6 -internal-isystem /usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/12.2.0/../../../../include/c++/12.2.0 -internal-isystem /usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/12.2.0/../../../../include/c++/12.2.0/x86_64-pc-linux-gnu -internal-isystem /usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/12.2.0/../../../../include/c++/12.2.0/backward -internal-isystem /usr/lib/clang/14.0.6/include -internal-isystem /usr/local/include -internal-isystem /usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/12.2.0/../../../../x86_64-pc-linux-gnu/include -internal-externc-isystem /include -internal-externc-isystem /usr/include -fdeprecated-macro -fdebug-compilation-dir=/mnt/SSD/Projects/GitHub/callofcode/challenges/C++/pythagorean_triplet -ferror-limit 19 -stack-protector 2 -fgnuc-version=4.2.1 -fcxx-exceptions -fexceptions -fcolor-diagnostics -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /tmp/solution-ed3d52.o -x c++ solution.cpp clang -cc1 version 14.0.6 based upon LLVM 14.0.6 default target x86_64-pc-linux-gnu ignoring nonexistent directory "/usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/12.2.0/../../../../x86_64-pc-linux-gnu/include" ignoring nonexistent directory "/include" #include "..." search starts here: #include <...> search starts here: /usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/12.2.0/../../../../include/c++/12.2.0 /usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/12.2.0/../../../../include/c++/12.2.0/x86_64-pc-linux-gnu /usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/12.2.0/../../../../include/c++/12.2.0/backward /usr/lib/clang/14.0.6/include /usr/local/include /usr/include End of search list. "/usr/bin/ld" -pie --eh-frame-hdr -m elf_x86_64 -dynamic-linker /lib64/ld-linux-x86-64.so.2 -o a.out /usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/12.2.0/../../../../lib64/Scrt1.o /usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/12.2.0/../../../../lib64/crti.o /usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/12.2.0/crtbeginS.o -L/usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/12.2.0 -L/usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/12.2.0/../../../../lib64 -L/lib/../lib64 -L/usr/lib/../lib64 -L/lib -L/usr/lib /tmp/solution-ed3d52.o -lgcc --as-needed -lgcc_s --no-as-needed -lc -lgcc --as-needed -lgcc_s --no-as-needed /usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/12.2.0/crtendS.o /usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/12.2.0/../../../../lib64/crtn.o /usr/bin/ld: /tmp/solution-ed3d52.o: in function main': solution.cpp:(.text+0x1bf): undefined reference to std::cout' /usr/bin/ld: solution.cpp:(.text+0x1cb): undefined reference to std::basic_ostream<char, std::char_traits<char> >& std::operator<< <std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&, char const*)' /usr/bin/ld: solution.cpp:(.text+0x22a): undefined reference to std::cout' /usr/bin/ld: solution.cpp:(.text+0x22f): undefined reference to std::ostream::operator<<(int)' /usr/bin/ld: solution.cpp:(.text+0x23e): undefined reference to std::basic_ostream<char, std::char_traits<char> >& std::operator<< <std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&, char const*)' /usr/bin/ld: solution.cpp:(.text+0x256): undefined reference to std::cout' /usr/bin/ld: solution.cpp:(.text+0x25d): undefined reference to std::basic_ostream<char, std::char_traits<char> >& std::endl<char, std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&)' /usr/bin/ld: solution.cpp:(.text+0x262): undefined reference to std::ostream::operator<<(std::ostream& (*)(std::ostream&))' /usr/bin/ld: /tmp/solution-ed3d52.o: in function __cxx_global_var_init': solution.cpp:(.text.startup+0xc): undefined reference to std::ios_base::Init::Init()' /usr/bin/ld: solution.cpp:(.text.startup+0x13): undefined reference to std::ios_base::Init::~Init()'

[onurbbr]

I tried ubuntu server and ubuntu docker image. The result is the same.

root@ubuntu:~# clang solution.cpp
/usr/bin/ld: /tmp/solution-6d7d40.o: in function main': solution.cpp:(.text+0x182): undefined reference to std::cout' /usr/bin/ld: solution.cpp:(.text+0x18e): undefined reference to std::basic_ostream<char, std::char_traits<char> >& std::operator<< <std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&, char const*)' /usr/bin/ld: solution.cpp:(.text+0x1ed): undefined reference to std::cout' /usr/bin/ld: solution.cpp:(.text+0x1f2): undefined reference to std::ostream::operator<<(int)' /usr/bin/ld: solution.cpp:(.text+0x201): undefined reference to std::basic_ostream<char, std::char_traits<char> >& std::operator<< <std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&, char const*)' /usr/bin/ld: solution.cpp:(.text+0x219): undefined reference to std::cout' /usr/bin/ld: solution.cpp:(.text+0x220): undefined reference to std::basic_ostream<char, std::char_traits<char> >& std::endl<char, std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&)' /usr/bin/ld: solution.cpp:(.text+0x225): undefined reference to std::ostream::operator<<(std::ostream& (*)(std::ostream&))' /usr/bin/ld: /tmp/solution-6d7d40.o: in function __cxx_global_var_init': solution.cpp:(.text.startup+0xc): undefined reference to std::ios_base::Init::Init()' /usr/bin/ld: solution.cpp:(.text.startup+0x13): undefined reference to std::ios_base::Init::~Init()' clang: error: linker command failed with exit code 1 (use -v to see invocation)

[Legoeggolas]

@onurbbr
You are using clang instead of clang++
The former cannot compile C++ code unless you explicitly set some flags and linkers (even then I am unsure about that, given standards and all) and clang++ is the recommended way to compile C++ code. I'm sorry but I did not notice this earlier, since I am the most familiar with GCC and MSVC.

After you have added the appropriate include in the header file and uncommented the main function, it should compile properly.
Or, you can write your own main(), include the header, and compile that file with the given source file (the way I intended the program to be used). In hindsight, I should have used flags instead of commenting out deprecated code, which I will be sure to do in any other solutions I submit.

[onurbbr]

@onurbbr You are using clang instead of clang++ The former cannot compile C++ code unless you explicitly set some flags and linkers (even then I am unsure about that, given standards and all) and clang++ is the recommended way to compile C++ code. I'm sorry but I did not notice this earlier, since I am the most familiar with GCC and MSVC.

After you have added the appropriate include in the header file and uncommented the main function, it should compile properly. Or, you can write your own main(), include the header, and compile that file with the given source file (the way I intended the program to be used). In hindsight, I should have used flags instead of commenting out deprecated code, which I will be sure to do in any other solutions I submit.

Hmm. I tried with ubuntu vm and it worked. That's weird because my main machine is not compiling this code. Anyway problem is my main machine. It works on Raspberry Pi 4 too. Sorry for misunderstanding.

EDIT: My machine linked clang++ as clang. I don't know how this happened. A strange situation has arisen. I am sorry for this. Thanks for your time. Have a nice day, keep coding!

[Legoeggolas]

@onurbbr
You're very welcome, and I'm glad that we could come to a resolution. Have a nice day too, and happy coding!