/in/foo.cc: In function 'int main()':
/in/foo.cc:22:7: error: expected ';' before 'g1'
  time g1(a[0],a[1],a[2]);
       ^~
/in/foo.cc:22:25: warning: statement is a reference, not call, to function 'time' [-Waddress]
  time g1(a[0],a[1],a[2]);
                         ^
/in/foo.cc:22:25: warning: statement has no effect [-Wunused-value]
/in/foo.cc:24:7: error: expected ';' before 'g2'
  time g2(a[0],a[1],a[2]);
       ^~
/in/foo.cc:24:25: warning: statement is a reference, not call, to function 'time' [-Waddress]
  time g2(a[0],a[1],a[2]);
                         ^
/in/foo.cc:24:25: warning: statement has no effect [-Wunused-value]
/in/foo.cc:25:6: error: 'g1' was not declared in this scope
  ans=g1.minus(g2);
      ^~
/in/foo.cc:25:15: error: 'g2' was not declared in this scope
  ans=g1.minus(g2);
               ^~