Compilare: user.cpp: In function ‘void eliminare()’: user.cpp:16:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<strlen(s);i++) ^ user.cpp: In function ‘int main()’: user.cpp:33:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<strlen(s);i++) ^ user.cpp:41:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<strlen(s);i++) ^ user.cpp:31:11: warning: unused variable ‘q’ [-Wunused-variable] int i,q=0,l=0,j,k; ^