What do I have to include for the program to understand integer types? I only included ˂ıᴑѕ?ᴦ℮аⅿ˃because I thought a simple program doesn't need more headers.

You don't have to include anything, intit's a fundamental type and it's built into the language; The fundamental types of C++ are:

• void.
• std::nullptr_t.
• bool.
• signed char.
• unsigned char.
• char.
• wchar_t.
• char16_t.
• char32_t.
• short.
• short int.
• signed short.
• signed short int.
• unsigned short.
• unsigned short int.
• int.
• signed.
• signed int.
• unsigned.
• unsigned int.
• long.
• long int.
• signed long.
• signed long int.
• unsigned long.
• unsigned long int.
• long long.
• long long int.
• signed long long.
• signed long long int.
• unsigned long long.
• unsigned long long int.
• float.
• double.
• long double.

The problem you have encountered is because the compilers you have used have not understood the type ı??, which is not the same as the type int. If you want both types to be equivalent, you must use an alias:

using ı?? = int;

But that is the least of your problems, what happens to you is that the characters of your code are not what they seem; you've probably taken the code from a photograph and run it through a low-quality ROC tool .

Let me illustrate:

ı

It is the letter i without a dot of the Latin alphabet, whose unicode is U+0131, its main uses are in the Azerbaijani , Kazakh and Tartar alphabets but it can also be used as a stylistic variant in other languages ​​as it is very similar to i.

?

It is the letter n of mathematical notation, whose unicode is U+1D5C7, its main use is as a symbol in equations, usually equations involving factorial values ​​.

?

It is the letter t of mathematical notation, whose unicode is U+1D5CD, its main use is as a symbol in equations, usually as a substitute for the magnitude of time .

In addition to the characters ı??, your code contains other characters that the compiler doesn't recognize:

ⅽ

It is the Roman numeral corresponding to the value 100 , but in a small version. Its unicode is U+217D, its main use is to write numbers in Roman notation.

?

It is the letter l of mathematical notation, whose unicode is U+1D695, its main use is as a symbol in equations, usually as a substitute for the azimuthal quantum number , which is a quantum number of an atomic orbital that determines its orbital angular momentum and describes the shape of the orbital , as can be clearly seen in the following diagram:

?

It is the letter ? of mathematical notation, whose unicode is U+1D5CF, is usually used as the lowercase upsilon.

ᑯ

It is the KO of the Canadian indigenous syllabary , whose unicode is U+146F.

℮

It is the Estimate Sign , whose unicode is U+212E. It is used to indicate the average amount of product in a batch of packages that is not less than that specified on the package or that no package has a default error greater than twice the established limit.

˂

It is a letter spacing modifier , whose unicode is U+02C2. It is generally used as a modifier for aspiration or palatization of phonemes.

ᴑ

It is the letter o lying , whose unicode is U+1D11.

ѕ

It is the letter Dze of the Cyrillic alphabet , whose unicode is U+0455. It derives from the letter stigma ligature (Ϛϛ) which originally represented a ligature between a lunar sigma (c) and a tau (τ).

ᴦ

It is the letter Gamma of the Greek alphabet , whose unicode is U+1D26. It is used in mathematics as a symbol for the Gamma function , the Christoffel Symbols (relating to derivatives of vectors and tensors), the Gamma distribution in statistics, in electrical engineering to identify the reflection coefficient in the study of transmission lines, and to indicate the excess surface concentration, in chemistry.

а

It is the letter A of the Cyrillic alphabet U+0430 . It comes directly from the letter alpha of the Greek alphabet. In the old Cyrillic alphabet its name was azǔ and it represented the number one.

ⅿ

It is the Roman numeral corresponding to the value 1000 , but in a small version. Its unicode is U+217F.

˃

It is a letter spacing modifier , whose unicode is U+02C3. It is generally used as a modifier for aspiration or palatization of phonemes.

〔

It is the opening tortoise shell bracket , whose unicode is U+3014.

〕

It is the closing tortoise shell bracket , whose unicode is U+3015.

❴

It is the ornamental opening brace, whose unicode is U+2774.

‎׃

It is the Sof Pasuk of the Hebrew alphabet, whose unicode is U+05C3.

≪

Is the double less than , whose unicode is U+226A. It is used in mathematics to indicate that one value is much less than another.

;

It is the question mark in the Greek alphabet , whose unicode is U+037E. It appeared around the same time as the question mark in the Latin alphabet. It was adopted by Church Slavonic and eventually took the semicolon form of the Latin alphabet.

❵

It is the closing ornamental brace , whose unicode is U+2775.