text: /*
  gcc -std=c17 -lc -lm -pthread -o ../_build/c/program_system.exe ./c/program_system.c && (cd ../_build/c/;./program_system.exe)
  https://en.cppreference.com/w/c/program/system
  */
  #include <stdlib.h>
  int main(void) {
      system("date +%A");
  }
  
  