Language: C++

#include <iostream>
using namespace std;
int main()
{
	int n, b, f, r, v;
	int B[4][3][10] = {0};
????????????cin >> n;
	for(int i=0; i<n; ++i)
	{
		cin >> b >> f >> r >> v;
		B[b-1][f-1][r-1] = v;
	}
	for( b=0; b<4; ++b)
	{
		for(f=0; f<3;++f)
		{
			for(r=0;r<10;++r)
				cout << " " << B[b-1][f-1][r-1];
			cout << endl;
		}
		if(b!=3)
			for(int i=0;i<20;++i)
				cout << "#";
		cout << endl;
	}
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:1: error: expected primary-expression before '?' token
    7 | ????????????cin >> n;
      | ^
a.cc:7:2: error: expected primary-expression before '?' token
    7 | ????????????cin >> n;
      |  ^
a.cc:7:3: error: expected primary-expression before '?' token
    7 | ????????????cin >> n;
      |   ^
a.cc:7:4: error: expected primary-expression before '?' token
    7 | ????????????cin >> n;
      |    ^
a.cc:7:5: error: expected primary-expression before '?' token
    7 | ????????????cin >> n;
      |     ^
a.cc:7:6: error: expected primary-expression before '?' token
    7 | ????????????cin >> n;
      |      ^
a.cc:7:7: error: expected primary-expression before '?' token
    7 | ????????????cin >> n;
      |       ^
a.cc:7:8: error: expected primary-expression before '?' token
    7 | ????????????cin >> n;
      |        ^
a.cc:7:9: error: expected primary-expression before '?' token
    7 | ????????????cin >> n;
      |         ^
a.cc:7:10: error: expected primary-expression before '?' token
    7 | ????????????cin >> n;
      |          ^
a.cc:7:11: error: expected primary-expression before '?' token
    7 | ????????????cin >> n;
      |           ^
a.cc:7:12: error: expected primary-expression before '?' token
    7 | ????????????cin >> n;
      |            ^
a.cc:7:21: error: expected ':' before ';' token
    7 | ????????????cin >> n;
      |                     ^
      |                     :
a.cc:7:21: error: expected primary-expression before ';' token
a.cc:7:21: error: expected ':' before ';' token
    7 | ????????????cin >> n;
      |                     ^
      |                     :
a.cc:7:21: error: expected primary-expression before ';' token
a.cc:7:21: error: expected ':' before ';' token
    7 | ????????????cin >> n;
      |                     ^
      |                     :
a.cc:7:21: error: expected primary-expression before ';' token
a.cc:7:21: error: expected ':' before ';' token
    7 | ????????????cin >> n;
      |                     ^
      |                     :
a.cc:7:21: error: expected primary-expression before ';' token
a.cc:7:21: error: expected ':' before ';' token
    7 | ????????????cin >> n;
      |                     ^
      |                     :
a.cc:7:21: error: expected primary-expression before ';' token
a.cc:7:21: error: expected ':' before ';' token
    7 | ????????????cin >> n;
      |                     ^
      |                     :
a.cc:7:21: error: expected primary-expression before ';' token
a.cc:7:21: error: expected ':' before ';' token
    7 | ????????????cin >> n;
      |                     ^
      |                     :
a.cc:7:21: error: expected primary-expression before ';' token
a.cc:7:21: error: expected ':' before ';' token
    7 | ????????????cin >> n;
      |                     ^
      |                     :
a.cc:7:21: error: expected primary-expression before ';' token
a.cc:7:21: error: expected ':' before ';' token
    7 | ????????????cin >> n;
      |                     ^
      |                     :
a.cc:7:21: error: expected primary-expression before ';' token
a.cc:7:21: error: expected ':' before ';' token
    7 | ????????????cin >> n;
      |                     ^
      |                     :
a.cc:7:21: error: expected primary-expression before ';' token
a.cc:7:21: error: expected ':' before ';' token
    7 | ????????????cin >> n;
      |                     ^
      |                     :
a.cc:7:21: error: expected primary-expression before ';' token
a.cc:7:21: error: expected ':' before ';' token
    7 | ????????????cin >> n;
      |                     ^
      |                     :
a.cc:7:21: error: expected primary-expression before ';' token