Compilare: user.cpp: In function ‘int main()’: user.cpp:18:26: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(n, 2000005, fi); ^ user.cpp:19:26: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(m, 2000005, fi); ^