Compiler Warning (level 1) C4218

nonstandard extension used : must specify at least a storage class or a type

With the default Microsoft extensions (/Ze), you can declare a variable without specifying a type or storage class. The default type is int.


// C4218.c
// compile with: /W4
i;  // C4218

int main()

Such declarations are invalid under ANSI compatibility (/Za).