Is `struct` keyword needed in declaring a variable of structure?

Question

I have come to know from book that for declaring a structure variable it is necessary a preceding struct keyword, but without that preceding struct in my Bloodshed\DevC++ compiler variable can be declared without any error like following,

struct stype
{
       int ival;
       float fval;
       double dval;
};

and in main,

stype s;
s.ival=10;s.dval=23.23;s.fval=233.23;
printf("%d %f %lf\n",s.ival,s.fval,s.dval);

This correctly prints what should be printed. Is there any modification behind using this struct keyword in variable declaration or what? why this code working??

Your compiler is compiling the file as a C++ file instead of a C file. Fix this setting and the code above will not compile. — Praetorian
– Praetorian, Commented Jul 6, 2012 at 15:01

Mihai Maruseac · Accepted Answer · 2012-07-06 14:58:26Z

8

In C it is obligatory (or you can use a typedef). In C++ not.

answered Jul 6, 2012 at 14:58

Mihai Maruseac

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2 Comments

amin__ Over a year ago

So what u are saying I am using C++ compiler thats why it is working here??

Mihai Maruseac Over a year ago

Yes, this is exactly what I'm saying.

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