The flag reasoning focuses on conio.h/clrscr()/getch() being Turbo-C-specific, which is true but not the actual defect — those would compile fine under Turbo C/Borland. The real bug is that int i; is declared AFTER the statement clrscr(); inside main()'s block. C89/C90 (the standard Turbo C and other legacy compilers strictly enforce) requires ALL variable declarations in a block to appear before any executable statements — mixing declarations and code was only permitted starting with C99. Because clrscr() executes before int i is declared, this is a 'declaration after statement' violation and will fail to compile under Turbo C/Borland with an error like 'Declaration syntax error' or 'Declaration terminated incorrectly', regardless of environment concerns. So 'Will not compile' is correct, just for a different reason than the flag suspected.