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uses crt;
const fi='input.txt';
fo='output.txt';
var f1,f2:text;
a,b:integer;
begin
assign(f1,fi); reset(f1);
assign(f2,fo); rewrite(f2);
readln(f1,a,b);
if (a=0) and (b=0) then writeln(f2,'Phuong trinh co vo so nghiem');
if (a<>0) then writeln(f2,-b/a:4:2);
if (a=0) and (b<>0) then writeln(f2,'Phuong trinh vo nghiem');
close(f1);
close(f2);
end.
a)
PROGRAM BAI1a;
VAR N, Tle, Tchan: integer;
BEGIN
Write ('Nhap N =');
Readln (N);
If (N mod 2) = 0 Then
Tle := N*((N - 2)/2 + 1)/2;
Tchan := (N + 2)*((N - 2)/2 + 1)/2;
If (N mod 2) = 1 Then
Tle := (N + 1)*((N-1)/2 +1)/2;
Tchan := (N + 1)*((N - 3)/2 + 1)/2;
WRITELN ('Sle =', Sle, 'Schan =', Schan);
READLN;
END.
const fi='data.txt';
fo='ketqua.txt';
var f1,f2:text;
a,b,h:integer;
begin
assign(f1,fi); reset(f1);
assign(f2,fo); rewrite(f2);
readln(f1,a,b,h);
writeln(f2,0.5*h*(a+b):4:2);
close(f1);
close(f2);
end.
uses crt;
const fi='hcn.dat';
fo='chuvi.out';
var f1,f2:text;
a,b:array[1..100]of integer;
n,i,j:integer;
begin
clrscr;
assign(f1,fi); reset(f1);
assign(f2,fo); rewrite(f2);
n:=0;
while not eof(f1) do
begin
n:=n+1;
readln(f1,a[n],b[n]);
end;
for i:=1 to n do
writeln(a[i]*b[i]);
for i:=1 to n do
writeln(f2,2*(a[i]+b[i]));
close(f1);
close(f2);
readln;
end.
Uses crt;
Const fi='input.txt';
Fo='output.txt';
Var f1,f2:text;
A,b:array[1..100] of integer;
I,n:integer;
Begin
Clrscr;
Assign(f1,fi); reset(f1);
Assign(f2,fo); rewrite(f2);
N:=0;
While not eof(f1) do
Begin
Inc(n);
Readln(f1,a[n],b[n]);
End;
For i:=1 to n do
Begin
Writeln('Chu vi hinh chu nhat thu ',i,' la: ',(a[i]+b[i])*2);
Writeln(f2,Chu vi hinh chu nhat thu ',i,' la: ',(a[i]+b[i])*2);
End;
Close(f1);
Close(f2);
Readln;
End.
const fi='dulieu.txt';
fo='ketqua.txt';
var f1,f2:text;
m,n,i,t:integer;
begin
assign(f1,fi); reset(f1);
assign(f2,fo); rewrite(f2);
readln(f1,m,n);
t:=0;
for i:=m to n do
if i mod 2=0 then t:=t+i;
writeln(f2,t);
close(f1);
close(f2);
end.
Var f1, f2: text;
Tong, m, n, i: integer;
Begin
assign(f1, ‘DULIEU.TXT’);
reset(f1);
assign(f2, ‘KETQUA’);
rewrite(f2);
Tong;= 0;
read(f1, m, n);
for i:= m to n do
if i mod 2 = 0 then Tong:= Tong+i;
write(f2, Tong);
close(f1);
close(f2);
End.
Var f1, f2: text;
Tong, m, n, i: integer;
Begin
assign(f1, ‘DULIEU.TXT’);
reset(f1);
assign(f2, ‘KETQUA’);
rewrite(f2);
Tong;= 0;
read(f1, m, n);
for i:= m to n do
if i mod 2 = 1 then Tong:= Tong+i;
write(f2, Tong);
close(f1);
close(f2);
End.
Bài 1:
const fi='input.txt';
fo='ketqua.txt';
var f1,f2:text;
a,b:array[1..100]of integer;
i,n,t:integer;
begin
assign(f1,fi); reset(f1);
assign(f2,fo); rewrite(f2);
n:=0;
while not eof(f1) do
begin
n:=n+1;
readln(f1,a[n],b[n]);
end;
for i:=1 to n do
begin
t:=a[i]+b[i];
write(f2,t:4);
end;
close(f1);
close(f2);
end.
Bài 2:
const fi='input.txt';
fo='ketqua.txt';
var f1,f2:text;
d,r:array[1..100]of integer;
i,n:integer;
s:longint;
begin
assign(f1,fi); reset(f1);
assign(f2,fo); rewrite(f2);
n:=0;
while not eof(f1) do
begin
n:=n+1;
readln(f1,d[n],r[n]);
end;
for i:=1 to n do
begin
s:=d[i]*r[i];
write(f2,s:4);
end;
close(f1);
close(f2);
end.