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Bài 2:
#include <bits/stdc++.h>;
using namespace std;
int main();
{
long m,n;
cout<<"Nhap m="; cin>>m;
cout<<"Nhap n="; cin>>n;
cout<<m*n-2;
return 0;
}
1:
uses crt;
const fi='ketqua.txt';
var f1:text;
st:string;
i,d:integer;
begin
clrscr;
assign(f1,fi); rewrite(f1);
write('Nhap xau:'); readln(st);
d:=length(st);
for i:=1 to d do
if st[i]=#32 then delete(st,i,1);
writeln(f1,st);
close(f1);
end.
2:
uses crt;
var a,b,c,d:integer;
{----------chuong-trinh-con-----------------------}
function min(x,y:integer):integer;
begin
if x<y then min:=x
else min:=y;
end;
{---------------chuong-trinh-chinh--------------------}
begin
clrscr;
write('a='); readln(a);
write('b='); readln(b);
write('c='); readln(c);
write('d='); readln(d);
writeln(min(a,min(b,min(c,d))));
readln;
end.
cau 1:
uses crt;
var a:array[1..100] of integer;
n,i,min: integer;
begin
readln(n);
for i:=1 to n do
readln(a[i]);
min:=a[1];
for i:=2 to n do
if min>a[i] then min=a[i];
writeln(a[i]);
readln;
end.
cau 2:
uses crt;
g:text;
s:string;
const fo='CHUSO.TXT';
begin
assign(g,fo);
rewrite(g);
readln(s);
for i:=1 to length(s) do
if not((s[i] in ['a'..'z'])and(s[i] in ['A'..'Z])) then delete(s,i,1);
writeln(g,s);
end.
uses crt;
var a:array[1..200]of integer;
n,i,k,t,t1:integer;
begin
clrscr;
write('Nhap n='); readln(n);
for i:=1 to n do
begin
write('A[',i,']='); readln(a[i]);
end;
write('Nhap k='); readln(k);
t:=0;
for i:=1 to n do
if a[i] mod 2<>0 then t:=t+a[i];
t1:=0;
for i:=1 to n do
if a[i] mod k=0 then t1:=t1+a[i];
writeln('Tong cac phan tu le la: ',t);
writeln('Tong cac phan tu la boi cua ',k,' la: ',t1);
readln;
end.
uses crt;
var a:array[1..100]of integer;
i,n,t:integer;
begin
clrscr;
write('Nhap n='); readln(n);
for i:=1 to n do
begin
write('A[',i,']='); readln(a[i]);
end;
for i:=1 to n do
write(a[i]:4);
writeln;
t:=0;
for i:=1 to n do
if a[i] mod 7=0 then t:=t+a[i];
writeln('Tong cac so chia het cho 7 la: ',t);
readln;
end.
uses crt;
var a:array[1..10]of longint;
n,i,t,dem,dem1,dem2,t1:integer;
begin
clrscr;
readln(n);
for i:=1 to n do readln(a[i]);
for i:=1 to n do write(a[i]:4);
writeln;
t:=0;
for i:=1 to n do t:=t+a[i];
writeln(t);
t1:=0;
dem1:=0;
dem2:=0;
for i:=1 to n do
begin
if a[i]>0 then dem1:=dem+1;
if a[i] mod 2=0 then
begin
dem2:=dem2+1;
t1:=t1+a[i];
end;
end;
writeln(dem1);
writeln(t1/dem2:4:2);
readln;
end.
uses crt;
var a:array[1..10]of longint;
n,i,t,dem,dem1,dem2,t1:integer;
begin
clrscr;
readln(n);
for i:=1 to n do readln(a[i]);
for i:=1 to n do write(a[i]:4);
writeln;
t:=0;
for i:=1 to n do t:=t+a[i];
writeln(t);
t1:=0;
dem1:=0;
dem2:=0;
for i:=1 to n do
begin
if a[i]>0 then dem1:=dem+1;
if a[i] mod 2=0 then
begin
dem2:=dem2+1;
t1:=t1+a[i];
end;
end;
writeln(dem1);
writeln(t1/dem2:4:2);
readln;
end.
Bài 5:
#include <bits/stdc++.h>
using namespace std;
long long a,b;
int main()
{
cin>>a>>b;
cout<<(a+b)*2;
return 0;
}
#include <bits/stdc++.h>
using namespace std;
long long a[100],n,i,t,t1,dem,dem1;
//chuongtrinhcon
bool ktnt(long long x)
{
if (x<=1) return(false);
for (int i=2; i*i<=x; i++)
if (x%i==0) return(false);
return true;
}
//chuongtrinhchinh
int main()
{
cin>>n;
for (i=1; i<=n; i++)
{
cin>>a[i];
}
for (i=1; i<=n; i++) cout<<a[i]<<" ";
cout<<endl;
t=0;
for (i=1; i<=n; i++) if (a[i]%2==0) t=t+a[i];
cout<<t<<endl;
dem=0;
for (i=1; i<=n; i++) if (a[i]%3==0) dem++;
cout<<dem<<" ";
t1=0;
dem1=0;
for (i=1; i<=n; i++)
if (a[i]%2!=0)
{
t1+=a[i];
dem1++;
}
cout<<fixed<<setprecision(2)<<(t1*1.0)/(dem1*1.0)<<endl;
for (i=1; i<=n; i++)
if (ktnt(a[i])==true) cout<<a[i]<<" ";
return 0;
}
#include <bits/stdc++.h>
using namespace std;
double a,b;
int main()
{
cin>>a>>b;
cout<<fixed<<setprecision(2)<<pow((2*a+5*b),2);
return 0;
}