uses crt;

var a,b,c:real;

begin

clrscr;

write('Nhap diem Toan:'); readln(a);

write('Nhap diem Van:'); readln(b);

write('Nhap diem Anh:'); readln(c);

writeln('Diem trung binh la: ',(a+b+c)/3:4:2);

readln;

end.

#include <bits/stdc++.h>

using namespace std;

double a[100],b[100],c[100],tb[100];

int n,i;

int main()

{

cin>>n;

for (i=1; i<=n; i++) cin>>a[i]>>b[i]>>c[i];

for (i=1; i<=n; i++)

tb[i]=(a[i]+b[i]+c[i])/3;

for (i=1; i<=n; i++)

cout<<"Diem cua ban thu "<<i<<" la: "<<fixed<<setprecision(2)<<tb[i]<<endl;

return 0;

}

var i,n,s:integer;

t,v,a,tb:real;

begin

write('Nhap so luong hoc sinh ');readln(n);

for i:=1 to n do

begin

write('Nhap diem toan ');readln(t);

write('Nhap diem van ');readln(v);

write('Nhap diem anh ');readln(a);

s:=t+v+a;

tb:=s/3;

write('DTB cua ban thu ',i,' = ',tb:10:2);

s:=0;

end;

readln

end.

program DiemTB;

var

      diemToan, diemVan, diemTB: real;

begin

      write('Nhap diem mon Toan: ');

      readln(diemToan);

      write('Nhap diem mon Van: ');

      readln(diemVan);

      diemTB := (diemToan + diemVan) / 2;

      writeln('Diem trung binh: ', diemTB:0:2);

      if diemTB >= 5 then

            writeln('Chuc mung! Ban da dau ky thi.')

      else

            writeln('Rat tiec! Ban da truot ky thi.');

      readln;

end.

Nếu chưa học câu lệnh này thì rep lại cho mình để mình dùng mấy câu lệnh đã học từ b8 trở về trước nhá! Good luck for you :D 

uses crt;

var a:array[1..50]of real;

max:real;

i,n:integer;

begin

clrscr;

write('Nhap n='); readln(n);

for i:=1 to n do 

  begin

write('Nhap diem cua ban thu ',i,'='); readln(a[i]);

end;

max:=a[1];

for i:=1 to n do 

  if max<a[i] then max:=a[i];

writeln(max);

readln;

end.

uses crt;

var a,b,c,tb:array[1..10]of real;

ln,nn:real;

n:integer;

i:integer;

begin

clrscr;

readln(n);

for i:=1 to n do readln(a[i],b[i],c[i]);

for i:=1 to n do 

  tb[i]:=(a[i]+b[i]+c[i])/3;

for i:=1 to n do

writeln(tb[i]:4:2);

readln;

end.