Compilare: main.cpp: In function 'int main()': main.cpp:52:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 52 | for(int i=patternlengh-1;i<text.size();i++) | ~^~~~~~~~~~~~ main.cpp: In function 'int hashing(std::string, int)': main.cpp:28:12: warning: 'hash1' may be used uninitialized in this function [-Wmaybe-uninitialized] 28 | return hash1; | ^~~~~ main.cpp: In function 'int main()': main.cpp:33:18: warning: 'hash1' may be used uninitialized in this function [-Wmaybe-uninitialized] 33 | return (hash1*base+c)%mod; | ~~~~~^~~~~ main.cpp:21:9: note: 'hash1' was declared here 21 | int hash1,i; | ^~~~~ main.cpp:55:9: warning: 'hash1' may be used uninitialized in this function [-Wmaybe-uninitialized] 55 | if(texthash==patternhash) | ^~