Compilare: user.cpp: In function ‘char nextChar()’: user.cpp:16:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(loc == sx.size()){ ^ user.cpp: In function ‘long long int getNum(int, int)’: user.cpp:69:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(ends + lung < s.size()){ ^ user.cpp:87:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=ends+1;i<s.size();++i){ ^ user.cpp:93:13: warning: unused variable ‘del’ [-Wunused-variable] int del = (l1+l2) - lung; ^ user.cpp:100:13: warning: unused variable ‘del’ [-Wunused-variable] int del = (l1+l2) - lung; ^ user.cpp: In function ‘int main()’: user.cpp:131:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int lung = 1; lung <= s.size();++lung){ ^ user.cpp:134:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(ends+1<s.size() && s[ends+1] != '1') continue; ^ user.cpp:124:48: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("infinitepatternmatching.in","r",stdin); ^ user.cpp:125:50: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("infinitepatternmatching.out","w",stdout); ^