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*Hình vuông:
#include <bits/stdc++.h>
using namespace std;
double n;
int main()
{
cin>>n;
cout<<fixed<<setprecision(2)<<n*4<<endl;
cout<<fixed<<setprecision(2)<<n*n;
return 0;
}
uses crt;
var a,b:real;
begin
clrscr;
readln(a,b);
writeln(2*(a+b):4:2);
writeln(a*b:4:2);
readln;
end.
Program Chu_nhat; uses crt;
Var a, b, S, CV: real;
Begin
Write('Nhap chieu dai:'); readln(a);
Write('Nhap chieu rong:'); readln(b);
S := a*b;
CV := (a+b)*2;
Writeln('Dien tich hinh chu nhat la:',S:3:2);
Writeln('Chu vi hinh chu nhat la:',CV:3:2);
readln;
end.
Tham khảo
program hcn;
uses crt;
var d,r,dt:longint;
cv:real;
begin
write('nhap chieu dai va chieu rong cua hcn:');
readln(d,r);
cv:=(d+r)*2;
dt:=d*r;
writeln(' chu vi hcn do la:',cv);
writeln(' dien tich hcn do la:',dt);
readln
end.
Program Hinh_Tamgiac_Program;
Uses crt;
Var a,b,c,s,p : real;
Begin
Clrscr;
Writeln(‘HINH TAM GIAC:’);
Write(‘nhap a =’);readln(a);
Write (‘nhap b =’);readln(b); Write(‘nhap c =’);readln(c);
If ((a+b)>c)and((b+c)>a)and((a+c)>b) then
Begin
p:=(a+b+c)/2;
s:=sqrt(p*(p-a)*(p-b)*(p-c)); Writeln(‘Chu vi tam giac:’,2*p:4:2) ; Writeln(‘Dien tich tam giac:’,s:4:2);
End
Else
Writeln(a,’, ‘, b,’, ‘, c, ‘ khong phai la ba canh cua tam giac’) ;
Readln;
End.
program hinhvuong;
var a,cv,dt:real;
begin
realn(a);
cv:=a*4;
dt:=a*a;
writeln(chu vi la:', cv:2:2);
writeln(dien tich la:', dt:2:2);
readln;
end.
program Hinh_Chu_Nhat;
uses crt;
var a,b,dt: integer;
begin
readln(a);
readln(b);
dt:=(a*b);
writeln(‘Dien tich la:’,dt);
readln
end.