error: expected ';', ',' or ') before numeric constant

Question

I am making a stack class, and trying to make an object of it and using it in another class. However, it mentions that there is an error. here's my code of intializing the stack object in the class:

class functions{
public:
int m[5];
int c=0;
stack_x mem(5);

What's `stack_x`? What's `mem`? What's `mem(5);` doing outside of a function? Where is the rest of your class and your program? — Blaze, Apr 15 '19 at 13:30
Where is curly bracket `};` that closes the class declaration? — vahancho, Apr 15 '19 at 13:30
already written but in the very end of the class, i just posted the part which making the error — Mee, Apr 15 '19 at 13:33
Duplicate of https://stackoverflow.com/q/54590838/560648. See my answer there. — Lightness Races in Orbit, Apr 15 '19 at 13:38

score 7 · Answer 1 · answered Apr 15 '19 at 13:32

7

You can't initialise members using parentheses in the class definition.
Use curly braces — stack_x mem{5};.

answered Apr 15 '19 at 13:32

molbdnilo

64,751
3
43
82

Some more detail: https://stackoverflow.com/a/54591052/560648 – Lightness Races in Orbit Apr 15 '19 at 13:39
"Use curly braces" - or `=`. `stack_x mem = 5;` – Jesper Juhl Apr 15 '19 at 13:48
stack_x is a stack class with a maximum size of 5, the stack class is implemnted using array, so i do it with []. when I put {}, the error is gone, however, am not sure that it will work properly as intended to? – Mee Apr 15 '19 at 13:54

score 0 · Answer 2 · answered Apr 15 '19 at 13:31

0

If the previous class (stack_x) looks like an custom class its correctly closed

class stack_x
{
 // Class definition
}; // MUST BE

class functions
{
// Class definition
};

answered Apr 15 '19 at 13:31

Pablo

82
6

I did so, but still not works, i only copied the part of intialzing the object of stack_x class in functions class – Mee Apr 15 '19 at 13:33

error: expected ';', ',' or ') before numeric constant

2 Answers2