how to write a enum value to a file

[aeaswara]

Hi all,

I need to know how will you write a enum value to an output file.
The Program Is As Follows:
typedef enum {
ID,INTLITERAL, BEGIN, END, READ, WRITE
}token;

when i read a "begin" in an input file say, in.txt i return BEGIN. and after returing i want to write "BEGIN" to a output file, say out.txt.
how do i do it.
thanks for helping.
aeaswara.

 

[ArkM]

enum is an integral (integer) type, but its sizeof is not specified by the language standard. It seems safe enum i/o approach is to force (int) cast when writing the enum value (and vice versa on reading)...

 

[Salem]

If you're looking for enum constant to string conversion, then you have to do something like this

char *tokenstr[] = {
   "ID", "INTLITERAL", "BEGIN", "END", "READ", "WRITE"
};

...

printf("%s\n", tokenstr[token] );

But this only works best if you don't have any explicit assignments in your original enumeration. For example, this would break the above.

typedef enum {
    ID, INTLITERAL, BEGIN=10, END, READ=20, WRITE
}token;

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