"Declaration Not allowed here" and "Constant Expression" Error in C

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user2828488

I used Microsoft Visual Studio to write a C code in C++ project and It's working fine there when I convert the file extension from my.cpp to my.c and tried to run in via TurboC++ 3.0 then it gives me number of errors like "Constant Expression Required" and "Declaration is not allowed here". I tried to run my code online compiler but its not giving me these error there.

Can anyone help me with this ?

I hope it's due to C99 mode but not confirmed. TurboC++ 3.0 Supports C99 or not ?

Note: I can't share my code directly here due to project research work , If anyone want to have a look at my code I can send you via private message , Sorty for that

haccks

The error: Declaration Not allowed here is due to the mixed type declaration of variables and the error: Constant Expression required is because of the variable length arrays.
Mixed type variables and variable length arrays are are allowed in C99 and latter. Neither MSVC nor Turbo C++ supports C99.

I tried to run my code online compiler but its not giving me these error there.

This is because almost all new (and online) C compilers support C99.

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edited at2021-06-24

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