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const fi='mang.txt';
fo='tong.txt';
var f1,f2:text;
a:array[1..100]of integer;
n,i,t:integer;
begin
assign(f1,fi); reset(f1);
assign(f2,fo); rewriteln(f2);
n:=0;
while not eof(f1) do
begin
inc(n);
read(f1,a[n]);
end;
t:=0;
for i:=1 to n do
t:=t+a[i];
writeln(f2,t);
close(f1);
close(f2);
end.
#include <bits/stdc++.h>
using namespace std;
long long a,b;
double tb;
int main()
{
freopen("dulieu.inp","r",stdin);
freopen("ketqua.out","w",stdout);
cin>>a>>b;
cout<<a<<" "<<b;
cout<<fixed<<setprecision(2)<<(a*1.0+b*1.0)/(2*1.0);
return 0;
}
uses crt;
const fi='dulieu.dat';
var f1:text;
a,b,p,s:array[1..100]of real;
i,n:integer;
begin
clrscr;
assign(f1,fi); reset(f1);
n:=0;
while not eof(f1) do
begin
n:=n+1;
readln(a[n],b[n]);
end;
for i:=1 to n do
begin
p[i]:=(a[i]+b[i])/2;
s[i]:=a[i]*b[i];
end;
for i:=1 to n do
writeln(p[i]:4:2,' ',s[i]:4:2);
close(f1);
readln;
end.
Bạn đọc kĩ đề câu 5 nhé. dulieu.dat gồm 2 dòng.
Câu 3:
Program hotrotinhoc_hoc24;
const fi='dulieu.dat';
fo='dtb.dat';
var a,b,c,d: integer;
procedure ip;
begin
assign(f,fi);
reset(f);
readln(f,a,b);
read(f,c,d);
close(f);
end;
procedure out;
begin
assign(f,fo);
rewrite(f);
write(f,(a+b+c+d)/4:1:2);
close(f);
end;
begin
ip;
out;
end.
Câu 2:
Program hotrotinhoc_hoc24;
const fi='ptb2.txt';
fo='ketqua.txt';
var f: text ;
a,b,c,denta: real;
procedure ip;
begin
assign(f,fi);
reset(f);
read(f,a,b,c);
close(f);
end;
procedure out;
begin
assign(f,fo);
rewrite(f);
denta:=sqr(b)-4*(a)*(c);
if denta<0 then write(f,'Phuong trinh vo nghiem');
if denta=0 then write(f,'Phuong trinh co nghiem kep ,gia tri x=',-(b/2*a));
if denta>0 then write(f,'Phuong trinh co hai nghiem phan biet,gia tri x1=',(-(b)+sqr(denta))/(2*a):1:2,' gia tri x2=',(-(b)-sqr(denta))/(2*a):1:2);
close(f);
end;
begin
ip;
out;
end.
Câu 1:
const fi='mang.txt';
fo='tong.txt';
var f1,f2:text;
dem,i,t:integer;
a:array[1..4]of integer;
begin
assign(f1,fi); reset(f1);
assign(f2,fo); rewrite(f2);
dem:=0;
while not eoln(f1) do
begin
inc(dem);
read(f1,a[dem]);
end;
t:=0;
for i:=1 to dem do
t:=t+a[i];
writeln(f2,t);
close(f1);
close(f2);
end.
Câu 2:
const fi='ptb2.txt';
fo='ketqua.txt';
var f1,f2:text;
a,b,c,delta,x1,x2:real;
begin
assign(f1,fi); reset(f1);
assign(f2,fo); rewrite(f2);
readln(f1,a,b,c);
delta:=sqr(b)-4*a*c;
if delta>0 then
begin
x1:=(-b-sqrt(delta))/2*a;
writeln(f2,'x1=',x1:4:2);
x2:=(-b+sqrt(delta))/2*a;
writeln(f2,'x2=',x2:4:2);
end
else if delta=0 then writeln(f2,'x1=x2=',-b/(2*a):4:2)
else writeln(f2,'phuong trinh vo nghiem');
close(f1);
close(f2);
end.
Câu 5:
const fi='dulieu.dat';
fo='tb.dat';
var f1,f2:text;
a:array[1..4]of integer;
dem,i:integer;
tb:real;
begin
assign(f1,fi); reset(f1);
assign(f2,fo); rewrite(f2);
dem:=0;
while not eof(f1) do
begin
inc(dem);
read(f1,a[dem]);
end;
tb:=0;
for i:=1 to dem do
tb:=tb+a[i];
writeln(f2,tb/dem:4:2);
close(f1);
close(f2);
end.
Câu 1:
Program hotrotinhoc_hoc24;
const fi='mang.txt';
fo='tong.txt';
var f: text;
a,b,c,d: integer;
procedure ip;
begin
assign(f,fi);
reset(f);
read(f,a,b,c,d);
close(f);
end;
procedure out;
begin
assign(f,fo);
rewrite(f);
write(f,a+b+c+d);
close(f);
end;
begin
ip;
out;
end.