Compilare: main.cpp: In function 'int main()': main.cpp:95:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < pos[maxSupport].size(); ++i) ~~^~~~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'void read()': main.cpp:48:33: warning: ignoring return value of 'char* fgets(char*, int, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fgets(fileText, 5000000, file); ^ main.cpp:59:33: warning: ignoring return value of 'char* fgets(char*, int, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fgets(fileText, 5000000, file); ^ main.cpp: In function 'int main()': main.cpp:89:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("secventa.out", "w", stdout); ^