CODEWITHSUNDEEP
ccommentsc89
Qosmo
Qosmo

Reputation: 1202

-Ansi and comments giving errors?

I'm getting errors while compiling with -ansi -pedantic on lines that have // Comment here. Why does this happen?

expected expression before '/' token

stray '\347' in program

Example code int someVariable = 0; // Some comment

I have many many errors of these, what is it?

Upvotes: 1

Views: 1298

Answers (2)

SLaks
SLaks

Reputation: 887453

C89 does not support C++-style comments.

Upvotes: 10

R.. GitHub STOP HELPING ICE
R.. GitHub STOP HELPING ICE

Reputation: 215259

Because the gcc developers are mistaken about what ANSI C means, or kept the option aligned to an old standard for "compatibility". ANSI C is ISO C is C99, which allows // comments, but when many people say ANSI C they mean "the first standardization of the C language by ANSI", i.e. C89. The gcc -ansi option is equivalent to -std=c89.

If you're trying to enforce conformance to modern standards, you should use -std=c99 instead of -ansi.

Upvotes: 4

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