Compilare: user.cpp: In function ‘std::string calculstring(char*)’: user.cpp:15:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < strlen(s); i ++) ^ user.cpp: In function ‘int main()’: user.cpp:43:44: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < z.size() - 1; i ++) ^ user.cpp:56:53: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < m[calculstring(s)].size(); i ++) ^ user.cpp:55:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%s", s); ^