foo.cpp: In function 'int main()':
foo.cpp:7:14: error: 'k' was not declared in this scope
  scanf("%d",&k);
              ^
foo.cpp:8:2: error: 'cube' was not declared in this scope
  cube[1][1]='+';cube[1][2]='-';cube[1][3]='-';cube[1][4]='-';cube[1][5]='+';
  ^
foo.cpp:14:2: error: 'n' was not declared in this scope
  n= 
  ^
foo.cpp:15:2: error: expected primary-expression before 'return'
  return 0;
  ^
foo.cpp:15:2: error: expected ';' before 'return'