Language: C++

#include <iostream>
using namespace std;

int main()
{
??????int x;
    cin >> x;
    cout << x*x*x << endl;
??????return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:1: error: expected primary-expression before '?' token
    6 | ??????int x;
      | ^
a.cc:6:2: error: expected primary-expression before '?' token
    6 | ??????int x;
      |  ^
a.cc:6:3: error: expected primary-expression before '?' token
    6 | ??????int x;
      |   ^
a.cc:6:4: error: expected primary-expression before '?' token
    6 | ??????int x;
      |    ^
a.cc:6:5: error: expected primary-expression before '?' token
    6 | ??????int x;
      |     ^
a.cc:6:6: error: expected primary-expression before '?' token
    6 | ??????int x;
      |      ^
a.cc:6:7: error: expected primary-expression before 'int'
    6 | ??????int x;
      |       ^~~
a.cc:6:7: error: expected ':' before 'int'
    6 | ??????int x;
      |       ^~~
      |       :
a.cc:6:7: error: expected primary-expression before 'int'
    6 | ??????int x;
      |       ^~~
a.cc:6:7: error: expected ':' before 'int'
    6 | ??????int x;
      |       ^~~
      |       :
a.cc:6:7: error: expected primary-expression before 'int'
    6 | ??????int x;
      |       ^~~
a.cc:6:7: error: expected ':' before 'int'
    6 | ??????int x;
      |       ^~~
      |       :
a.cc:6:7: error: expected primary-expression before 'int'
    6 | ??????int x;
      |       ^~~
a.cc:6:7: error: expected ':' before 'int'
    6 | ??????int x;
      |       ^~~
      |       :
a.cc:6:7: error: expected primary-expression before 'int'
    6 | ??????int x;
      |       ^~~
a.cc:6:7: error: expected ':' before 'int'
    6 | ??????int x;
      |       ^~~
      |       :
a.cc:6:7: error: expected primary-expression before 'int'
    6 | ??????int x;
      |       ^~~
a.cc:6:7: error: expected ':' before 'int'
    6 | ??????int x;
      |       ^~~
      |       :
a.cc:6:7: error: expected primary-expression before 'int'
    6 | ??????int x;
      |       ^~~
a.cc:7:12: error: 'x' was not declared in this scope
    7 |     cin >> x;
      |            ^
a.cc:9:1: error: expected primary-expression before '?' token
    9 | ??????return 0;
      | ^
a.cc:9:2: error: expected primary-expression before '?' token
    9 | ??????return 0;
      |  ^
a.cc:9:3: error: expected primary-expression before '?' token
    9 | ??????return 0;
      |   ^
a.cc:9:4: error: expected primary-expression before '?' token
    9 | ??????return 0;
      |    ^
a.cc:9:5: error: expected primary-expression before '?' token
    9 | ??????return 0;
      |     ^
a.cc:9:6: error: expected primary-expression before '?' token
    9 | ??????return 0;
      |      ^
a.cc:9:7: error: expected primary-expression before 'return'
    9 | ??????return 0;
      |       ^~~~~~
a.cc:9:7: error: expected ':' before 'return'
    9 | ??????return 0;
      |       ^~~~~~
      |       :
a.cc:9:7: error: expected primary-expression before 'return'
    9 | ??????return 0;
      |       ^~~~~~
a.cc:9:7: error: expected ':' before 'return'
    9 | ??????return 0;
      |       ^~~~~~
      |       :
a.cc:9:7: error: expected primary-expression before 'return'
    9 | ??????return 0;
      |       ^~~~~~
a.cc:9:7: error: expected ':' before 'return'
    9 | ??????return 0;
      |       ^~~~~~
      |       :
a.cc:9:7: error: expected primary-expression before 'return'
    9 | ??????return 0;
      |       ^~~~~~
a.cc:9:7: error: expected ':' before 'return'
    9 | ??????return 0;
      |       ^~~~~~
      |       :
a.cc:9:7: error: expected primary-expression before 'return'
    9 | ??????return 0;
      |       ^~~~~~
a.cc:9:7: error: expected ':' before 'return'
    9 | ??????return 0;
      |       ^~~~~~
      |       :
a.cc:9:7: error: expected primary-expression before 'return'
    9 | ??????return 0;
      |       ^~~~~~
a.cc:9:7: error: expected ':' before 'return'
    9 | ??????return 0;
      |       ^~~~~~
      |       :
a.cc:9:7: error: expected primary-expression before 'return'
    9 | ??????return 0;
      |       ^~~~~~