Compilare: user.cpp: In function ‘bool compara(std::string&, std::string&)’: user.cpp:17:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<q.size();i++){ ^ user.cpp:18:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=poz;j<p.size();j++){ ^ user.cpp: In function ‘bool cmp(std::string, std::string)’: user.cpp:33:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < a.size(); i++) { ^ user.cpp: In function ‘int main()’: user.cpp:46:13: warning: unused variable ‘x’ [-Wunused-variable] int n,p,x,y,poz=-1,poz2=-1,ct=0,ok; ^ user.cpp:46:15: warning: unused variable ‘y’ [-Wunused-variable] int n,p,x,y,poz=-1,poz2=-1,ct=0,ok; ^ user.cpp:46:17: warning: unused variable ‘poz’ [-Wunused-variable] int n,p,x,y,poz=-1,poz2=-1,ct=0,ok; ^ user.cpp:46:24: warning: unused variable ‘poz2’ [-Wunused-variable] int n,p,x,y,poz=-1,poz2=-1,ct=0,ok; ^