Compilare: main.cpp: In function 'int rest_mod_3()': main.cpp:62:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 62 | for (i = 0; i < suma.length(); i++) | ~~^~~~~~~~~~~~~~~ main.cpp: In function 'void rest0()': main.cpp:78:10: warning: statement has no effect [-Wunused-value] 78 | for (i; i < suma.length(); i++) | ^ main.cpp:78:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 78 | for (i; i < suma.length(); i++) | ~~^~~~~~~~~~~~~~~ main.cpp: In function 'void rest1()': main.cpp:94:23: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 94 | if (suma.length() <= nr_cifa) | ~~~~~~~~~~~~~~^~~~~~~~~~ main.cpp:90:9: warning: unused variable 'cif' [-Wunused-variable] 90 | int cif, rest, sum; | ^~~ main.cpp: In function 'void rest2()': main.cpp:134:23: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 134 | if (suma.length() <= nr_cifb) | ~~~~~~~~~~~~~~^~~~~~~~~~ main.cpp:130:9: warning: unused variable 'cif' [-Wunused-variable] 130 | int cif, rest, sum; | ^~~