Problem	exam
User	qiutian
Submission Time	2026-01-07 10:50:47
Score	0
Max Time	N/A
Max Memory	N/A

Compile Error

exam.cpp: In function ‘int main()’:
exam.cpp:14:20: error: no match for ‘operator*’ (operand types are ‘__gnu_cxx::__alloc_traits<std::allocator<std::__cxx11::basic_string<char> >, std::__cxx11::basic_string<char> >::value_type’ {aka ‘std::__cxx11::basic_string<char>’} and ‘__gnu_cxx::__alloc_traits<std::allocator<std::__cxx11::basic_string<char> >, std::__cxx11::basic_string<char> >::value_type’ {aka ‘std::__cxx11::basic_string<char>’})
14 | printf(lines[1]*lines[3]);