/in/foo.cc: In function 'int main()':
/in/foo.cc:24:19: error: 'i' was not declared in this scope
    for (a = 1;a<l;i++)
                   ^
/in/foo.cc:36:13: error: 'i' was not declared in this scope
    if (d == i && c == 1) { cout << "(";cout << in[i]; }
             ^