1) Cho X nhận các giá trị: 5, 10, 20, 30, 200. Y nhận các giá trị: 3.5 ,6.2, 7.0, 23.3. Z nhân giá trị: 'A', 'B', 'a', '0'. Viết câu lệnh khai báo X, Y, Z sao cho ít tốn bộ nhớ nhất 2) Sửa lỗi cú pháp cho chương trình trên nếu có. Program KTHKT1; Const PI := 3.14; Var r, S: real; Begin Writeln('Nhap r = ') Readln(N); S := PI * sqr(r); Writeln('S = ' S:8:1);

2 câu trả lời

1) - Câu lệnh khai báo x, y sao cho ít tốn bộ nhớ nhất là:
var   x : byte;
        y : real;

2)

Dòng 2: Const PI := 3.14; => Const PI = 3.14;

Dòng 5: Writeln('Nhap r = ') => Writeln('Nhap r = ');

Dòng 8: Writeln('S = ' S:8:1); => Writeln('S = ' 'S:8:1);

Thiếu câu lệnh "End."
Hoàn chỉnh bài làm như sau: 

Program KTHKT1;

Const Pi=3.14;
Var r, S: real;
Begin
     Writeln('Nhap r = '); 
     Readln(r);
     s:=Pi*sqr(r);
     Writeln('S = ',s:8:1);
Readln;
End.

Xin 5* và ctlhn ạ!

 Câu lệnh khai báo x, y sao cho ít tốn bộ nhớ nhất là:
var   x : byte;
        y : real;
- Với khai báo trên, máy tính sẽ cấp phát bộ nhớ 7 byte (kiểu byte là 1 byte, kiểu real là 6 byte)

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giup e voi I/ Supply the correct form of the verbs in brackets 1. You (think) ……………………… collecting stamps costs much money? 2. Every year, my mother (give) ……………………… me a nice doll on my birthday. 3. Jenny says she loves collecting pens but she (not/continue) ……………………… this hobby from next year. 4. If you wash your hands more, you (have)……………………. less chance of catching flu. 5. Getting plenty of rest is very good. It (help)…………………. you to avoid depression. 6. Mr. John (be) ……………………… principal of our school since last year. 7. I (see) ……………………… a car accident on this corner yesterday. 8. We like (come)……………………to school by bus, but we hate (stand)………………………. and (wait) …………………… in the rain. 9. ……………………… (you/ ever/ meet) anyone famous? 10. My mother (come) ……………………… to stay with us next weekend. 11. When he lived in Manchester, he (work) ……………………… in a bank. 12. We (be) ……………………… students for four years. 13. We are planting trees around our school now. Our school (be) ……………………… surrounded by a lot of green trees. 14. What ……………………… your father usually ……………………… (do) in the evenings? 15. My sister likes (cook) ……………………… very much. She can cook many good foods. 16. My father says when he's retired, he (go) …………………… back to his village to do the gardening. 17. They want (buy) ……………………… some meat for dinner. 18. Linh is my best friend. We (know) ……………………… each other for 5 years. 19. I enjoy (fish) ……………………… because it is relaxing. 20. How about (go) ……………………… to the movie theatre?

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