Compilare: user.cpp: In function ‘int main()’: user.cpp:13:20: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(p,2000001,f1); ^ user.cpp:14:20: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(t,2000001,f1); ^