trong pascal khai báo nào sau đây là đúng? A. var tb :real B. var 4hs; integer. C. const x; real; D. var R-30 và giải thích đối với câu sai

2 câu trả lời

Đáp án là

A. var tb :real; 

Mà thật ra ko có cái nào đúng hết ấy do thiếu ; ở cuối mà 

Câu B sai do ở chỗ khai báo đúng ra : chứ ko ; và thiếu ; ở cuối

Câu C: const thì gán giá trị chứ ko phải kiểu dữ liệu

Câu DL thiếu khai báo kiểu dữ liệu là gì

câu A đúng(cũng có thể sai vì không có dấu ; )

cau B sai vì phải là dấu : chứ không phải là ;

C sai vì const phải gán giá trị ngay lúc khai báo

D sai vì var phải khai báo biến theo dạng var <name>:<kiểu>;

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