Compilare: user.cpp: In function ‘int main()’: user.cpp:26:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (s[i].str.length() == maxi) {cout << s[i].str;return 0;} ^ user.cpp:33:50: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int k = 0; k < s[i].str.length()&& p < s[j].str.length();k++){ ^ user.cpp:33:74: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int k = 0; k < s[i].str.length()&& p < s[j].str.length();k++){ ^ user.cpp:36:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (p == s[j].str.length())s[j].b=0; ^