Compilare: user.cpp: In function ‘int main()’: user.cpp:16:11: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] fin>>s+1; ^ user.cpp:17:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1;i<=strlen(s);i++) ^ user.cpp:20:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=2;i<=strlen(s);i++) ^