Viết chương trình ở ngôn ngữ lập trình nào vậy bạn ?

#include <bits/stdc++.h>

using namespace std;

long long a,b,c;

int main()

{

cin>>a>>b>>c;

if ((a==b) and (b==c)) cout<<"YES";

else cout<<"NO";

return 0;

}

uses crt;

var a,b,c:real;

begin

clrscr;

readln(a,b,c);

if (a>0) and (b>0) and (c>0) and (a+b>c) and (a+c>b) and (b+c>a) then 

begin

if (a=b) and (b=c) then write('Day la tam giac deu')

else writeln('Day khong la tam giac deu');

end

else writeln('Day khong la ba canh trong mot tam giac');

readln;

end.

program tamgiac;

var a,b,c: longint;

begin

write('Nhap canh b= ');readln(b);

write('Nhap canh c= ');readln(c);

if (a>b+c) or (b>a+c) or (c>a+b) then writeln('Day khong phai la ba canh tam giac')

else if (a=b) or(b=c) or (a=c) then writeln('Day la tam giac can')

else if (a=b) and (b=c) then writeln('Day la tam giac dau')

else if (sqr(a)=sqr(b)+sqr(c)) or (sqr(b)=sqr(c)+sqr(a)) or (sqr(c)=sqr(a)+sqr(b)) then writeln('Day la tam giac vuong')

else writeln('Day la tam giac thuong');

readln

end.

#include <iostream>
using namespace std;
int main()
{
    int a,b,c,kt;
    cout<<"Nhap a=";
    cin>>a;
    cout<<"Nhap b=";
    cin>>b;
    cout<<"Nhap c=";
    cin>>c;
    if ((a>0) and (b>0) and (c>0) and (a+b>c) and (a+c>b) and (b+c>a))
    {
        kt=0;
        if (a*a==b*b+c*c) kt=1;
        if (b*b==a*a+c*c) kt=1;
        if (c*c==a*a+b*b) kt=1;
        if ((a==b) and ((a<c) or (a>c)) and ((b<c) or (b>c))) kt=2;
        if ((b==c) and ((b<a) or (b>a)) and ((c<a) or (c>a))) kt=2;
        if ((c==a) and ((c<b) or (c>b)) and ((a<b) or (a>b))) kt=2;
        if ((a==c) and (b==c)) kt=3;
        if (kt==2) cout<<"Day la tam giac can";

else cout<<"Day khong la tam giac can";
    }
    else cout<<"Day khong la ba canh trong mot tam giac";
    return 0;
}

uses crt;

var a,b,c:real;

kt:integer;

begin

clrscr;

repeat

write('Nhap a='); readln(a);

write('Nhap b='); readln(b);

write('Nhap c='); readln(c);

until (a>0) and (b>0) and (c>0);

if (a+b>c) and (a+c>b) and (b+c>a) then 

begin

kt:=0;

if (a=b) and (a<>c) and (b<>c) then kt:=1;

if (b=c) and (b<>a) and (c<>a) then kt:=1;

if (c=a) and (c<>b) and (a<>b) then kt:=1;

if kt=0 then writeln('Day khong la tam giac can')

else writeln('Day la tam giac can');

end

else writeln('Day khong la ba canh trong mot tam giac');

readln;

end.

a = float(input("Nhap a : "))
b = float(input("Nhap b : "))
c = float(input("Nhap c : "))
if a+b>c and a+c>b and b+c>a:
    if a==b or a==c or b==c:
        if a==c==b:
            print("Day la ba canh cua tam giac deu")
        else:
            print("Day la ba canh cua tam giac can")
    elif (a**2)+(b**2)==c**2 or (a**2)+(c**2)==b**2 or (c**2)+(b**2)==a**2:
        print("Day la ba canh cua tam giac vuong")
    else:
        pass
else:
    print("Day khong phai ba canh cua tam giac")