Câu 29. Trong Free Pascal, dòng lệnh if a<0 then Write(a,'la so am'); else write(a,'la so duong'); có công dụng gì? A. Báo lỗi B. Xuất dòng chữ a la so am C. Xuất dòng chữ a la so duong D. Xuất dòng chữ a la so am hoặc Xuất dòng chữ a la so duong

2 câu trả lời

Câu lệnh bị dư dấu ";", mình xin phép sửa lại đề:

   if a<0 then Write(a,'la so am') else write(a,'la so duong');

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`->`Câu lệnh trên có công dụng: nếu a<0 thì in ra màn hình 'a la so am'; ngược lại in ra 'a la so duong'

`=>` Chọn D.Xuất dòng chữ a la so am hoặc Xuất dòng chữ a la so duong

KQ:=A. Báo lỗi;

vì trước else có dấu ; nên câu lệnh bị lỗi;

Câu hỏi trong lớp Xem thêm

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