Compilare: user.cpp: In function ‘int main()’: user.cpp:23:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<s.size();i++) ^ user.cpp:71:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<s.size();i++) ^ user.cpp:20:40: warning: unused variable ‘p2’ [-Wunused-variable] int i,nc=0,p=0,t=0,nsc,ct=0,ad=0,j,p2=0,add=0; ^ user.cpp:20:45: warning: unused variable ‘add’ [-Wunused-variable] int i,nc=0,p=0,t=0,nsc,ct=0,ad=0,j,p2=0,add=0; ^ user.cpp:64:23: warning: ‘nsc’ may be used uninitialized in this function [-Wmaybe-uninitialized] x[1].n=nsc; ^