Language: C++

#include <iostream>
using namespace std;

int main()
{
?????????int a,b,c;
      cin >> a >> b >> c;

      if(a<b && b<c)
         cout << "Yes" << endl;
      else
         cout << "No" << endl;


     return 0;
}
    

Compiler output:
a.cc: In function 'int main()':
a.cc:6:1: error: expected primary-expression before '?' token
    6 | ?????????int a,b,c;
      | ^
a.cc:6:2: error: expected primary-expression before '?' token
    6 | ?????????int a,b,c;
      |  ^
a.cc:6:3: error: expected primary-expression before '?' token
    6 | ?????????int a,b,c;
      |   ^
a.cc:6:4: error: expected primary-expression before '?' token
    6 | ?????????int a,b,c;
      |    ^
a.cc:6:5: error: expected primary-expression before '?' token
    6 | ?????????int a,b,c;
      |     ^
a.cc:6:6: error: expected primary-expression before '?' token
    6 | ?????????int a,b,c;
      |      ^
a.cc:6:7: error: expected primary-expression before '?' token
    6 | ?????????int a,b,c;
      |       ^
a.cc:6:8: error: expected primary-expression before '?' token
    6 | ?????????int a,b,c;
      |        ^
a.cc:6:9: error: expected primary-expression before '?' token
    6 | ?????????int a,b,c;
      |         ^
a.cc:6:10: error: expected primary-expression before 'int'
    6 | ?????????int a,b,c;
      |          ^~~
a.cc:6:10: error: expected ':' before 'int'
    6 | ?????????int a,b,c;
      |          ^~~
      |          :
a.cc:6:10: error: expected primary-expression before 'int'
    6 | ?????????int a,b,c;
      |          ^~~
a.cc:6:10: error: expected ':' before 'int'
    6 | ?????????int a,b,c;
      |          ^~~
      |          :
a.cc:6:10: error: expected primary-expression before 'int'
    6 | ?????????int a,b,c;
      |          ^~~
a.cc:6:10: error: expected ':' before 'int'
    6 | ?????????int a,b,c;
      |          ^~~
      |          :
a.cc:6:10: error: expected primary-expression before 'int'
    6 | ?????????int a,b,c;
      |          ^~~
a.cc:6:10: error: expected ':' before 'int'
    6 | ?????????int a,b,c;
      |          ^~~
      |          :
a.cc:6:10: error: expected primary-expression before 'int'
    6 | ?????????int a,b,c;
      |          ^~~
a.cc:6:10: error: expected ':' before 'int'
    6 | ?????????int a,b,c;
      |          ^~~
      |          :
a.cc:6:10: error: expected primary-expression before 'int'
    6 | ?????????int a,b,c;
      |          ^~~
a.cc:6:10: error: expected ':' before 'int'
    6 | ?????????int a,b,c;
      |          ^~~
      |          :
a.cc:6:10: error: expected primary-expression before 'int'
    6 | ?????????int a,b,c;
      |          ^~~
a.cc:6:10: error: expected ':' before 'int'
    6 | ?????????int a,b,c;
      |          ^~~
      |          :
a.cc:6:10: error: expected primary-expression before 'int'
    6 | ?????????int a,b,c;
      |          ^~~
a.cc:6:10: error: expected ':' before 'int'
    6 | ?????????int a,b,c;
      |          ^~~
      |          :
a.cc:6:10: error: expected primary-expression before 'int'
    6 | ?????????int a,b,c;
      |          ^~~
a.cc:6:10: error: expected ':' before 'int'
    6 | ?????????int a,b,c;
      |          ^~~
      |          :
a.cc:6:10: error: expected primary-expression before 'int'
    6 | ?????????int a,b,c;
      |          ^~~
a.cc:7:14: error: 'a' was not declared in this scope
    7 |       cin >> a >> b >> c;
      |              ^
a.cc:7:19: error: 'b' was not declared in this scope
    7 |       cin >> a >> b >> c;
      |                   ^
a.cc:7:24: error: 'c' was not declared in this scope
    7 |       cin >> a >> b >> c;
      |                        ^