modified: makefile

[0sama-Mirza]

Hi there,

I encountered an issue while trying to compile the project using the provided makefile on linux. The original makefile specifies the -cstd flag, which is causing an error on Linux systems. I've made a simple fix to update the makefile to specify the -std=c++14 flag instead, and use clang++ which resolves the issue.

• Error Message:
  When running the original makefile on Linux, I encountered the following error:

$ make
clang -o blackjack -cstd
clang-16: error: unknown argument: '-cstd'
clang-16: error: no input files
make: *** [makefile:2: blackjack] Error 1

• Updated makefile:

blackjack: blackjack.cpp
    clang++ -o blackjack blackjack.cpp -std=c++14