Compilare: user.cpp: In function ‘int main()’: user.cpp:12:11: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] in>>s1+1; ^ user.cpp:13:11: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] in>>s2+1; ^ user.cpp:14:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=2;i<=strlen(s1+1);++i) ^ user.cpp:23:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1;i<=strlen(s2+1);++i) ^ user.cpp:29:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(len==strlen(s1+1)){ ^