Viết chương trình tính tổng các số chia hết cho 3 trong file input.txt kết quả ghi vào tệp output.txt
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![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
#include <bits/stdc++.h>
using namespace std;
long long a,b,c,d;
int main()
{
freopen("input.txt","r",stdin);
freopen("output.txt","w",stdout);
cin>>a>>b>>c>>d;
cout<<a+b+c+d;
return 0;
}
![](https://rs.olm.vn/images/avt/0.png?1311)
const fi='input.txt';
fo='output.txt';
var f1,f2:text;
a,b,c,max:real;
begin
assign(f1,fi); reset(f1);
assign(f2,fo); rewrite(f2);
readln(f1,a,b,c);
min:=a;
if min>b then min:=b;
if min>c then min:=c;
writeln(f2,min);
close(f1);
close(f2);
end.
![](https://rs.olm.vn/images/avt/0.png?1311)
const fi='input.txt';
fo='output.txt';
var f1,f2:text;
a: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
inc(n);
read(f1,a[n]);
end;
t:=0;
for i:=1 to n do t:=t+a[i];
write(f2,t);
close(f1);
close(f2);
end.
![](https://rs.olm.vn/images/avt/0.png?1311)
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);
writeln(f2,a+b);
close(f1);
close(f2);
end.
![](https://rs.olm.vn/images/avt/0.png?1311)
const fi='input.txt';
fo='output.txt';
var f1,f2:text;
st:string[125];
a:array[1..125]of string;
i,d,dem,kt,j:integer;
begin
assign(f1,fi); reset(f1);
assign(f2,fo); rewrite(f2);
readln(f1,st);
d:=length(st);
dem:=1;
a[1]:=st[1];
for i:=1 to d do
begin
kt:=0;
for j:=1 to dem do
if a[j]=st[i] then kt:=1;
if kt=0 then
begin
inc(dem);
a[dem]:=st[i];
end;
end;
for i:=1 to dem do
begin
dem1:=0;
for j:=1 to d do
if a[i]=st[j] then inc(dem1);
writeln(f2,a[i],' xuat hien ',dem1,' lan');
end;
close(f1);
close(f2);
end.
![](https://rs.olm.vn/images/avt/0.png?1311)
const fi='input.txt';
fo='output.txt';
var f1,f2:text;
a:array[1..100,1..100]of integer;
i,n,m,j,max:integer;
begin
assign(f1,fi); reset(f1);
assign(f2,fo); rewrite(f2);
readln(f1,n,m);
for i:=1 to n do
begin
for j:=1 to m do
read(f1,a[i,j]);
readln(f1);
end;
for i:=1 to n do
begin
max:=a[i,1];
for j:=1 to n do
if max<a[i,j] then max:=a[i,j];
writeln(f2,max);
end;
close(f1);
close(f2);
end.
![](https://rs.olm.vn/images/avt/0.png?1311)
const fi='input.txt';
fo='output.txt';
var st:string;
f1,f2:text;
i,d:integer;
begin
assign(f1,fi); reset(f1);
assign(f2,fo); rewrite(f2);
readln(f1,st);
d:=length(st);
for i:=1 to d do
if st[i]<>#32 then write(f2,st[i]);
close(f1);
close(f2);
end.