Compilare: user.cpp: In function ‘int my_find(int)’: user.cpp:104:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 2; i <= s.size() && el < val; i++) ^ user.cpp: In function ‘void afis(int)’: user.cpp:170:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 1; i <= s.size() && el < val; i++) ^ user.cpp: In function ‘int main()’: user.cpp:211:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = 1; j <= s.size() && k < n; j++) ^ user.cpp: In member function ‘char InParser::read_ch()’: user.cpp:15:32: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff, 1, 4096, fin); ^