Compilare: user.cpp: In function ‘int main()’: user.cpp:24:30: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(sircmp,2000001,fin); ^ user.cpp:25:28: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(sirm,2000001,fin); ^