Compilare: user.cpp: In function ‘int main()’: user.cpp:18:30: warning: use of ‘ll’ length modifier with ‘f’ type character [-Wformat=] fprintf(g, "%.7llf", result); ^ user.cpp:21:27: warning: use of ‘ll’ length modifier with ‘f’ type character [-Wformat=] fprintf(g, "%.7llf", 0.0); ^ user.cpp:12:21: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &X); ^ user.cpp:13:21: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &M); ^