combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:12:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
12 | if(coins == s.size()){
| ~~~~~~^~~~~~~~~~~
combo.cpp:18:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
18 | if(coins == s.size()){
| ~~~~~~^~~~~~~~~~~
combo.cpp:24:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
24 | if(coins == s.size()){
| ~~~~~~^~~~~~~~~~~
combo.cpp:29:9: warning: value computed is not used [-Wunused-value]
29 | coins == press(s);
| ~~~~~~^~~~~~~~~~~
combo.cpp:30:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
30 | if(coins == s.size()){
| ~~~~~~^~~~~~~~~~~