Compilare: user.cpp: In function ‘int main()’: user.cpp:29:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (s[i].str.length() == maxi) {cout << s[i].str;return 0;} ^ user.cpp:43:44: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int k = 0; k < s[j].str.length()&& p < s[i].str.length();k++) ^ user.cpp:43:68: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int k = 0; k < s[j].str.length()&& p < s[i].str.length();k++) ^ user.cpp:47:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (p == s[i].str.length()){s[i].b=0;break;} ^