Chương trình 1:
program ct;
uses crt;
var i,n,S:integer;
A:array[1..100] of integer;
begin
clrscr;
write('nhap n:=');readln(n);
for i:=1 to n do
begin
write('nhap mang A[',i,']:=');readln(A[i]);
end;
S:=0;
for i:=1 to n do S:=S+A[i];
writeln('tong cua day so la:',S);
readln
end.
chương trình 2:
program ct;
uses crt;
var i,n,T:integer;
A:array[1..100] of integer;
begin
clrscr;
write('nhap n:=');readln(n);
for i:=1 to n do
begin
write('nhap mang A[',i,']:=');readln(A[i]);
end;
T:=1;
for i:=1 to n do T:=T*A[i];
writeln('tich cua day so la:',T);
readln
end.
chương trình 3:
program ct;
uses crt;
var n:integer;
x:real;
const sai_so=0.005;
begin
clrscr;
x:=1; n:=1;
while x>=sai_so do
begin
x:=1/n;
n:=n+1;
end;
writeln('so n be nhat de 1/n<', sai_so:5:4 ,' la ',n-1);
readln
end.
