Compilare: user.cpp: In function ‘int main()’: user.cpp:52:20: warning: format ‘%d’ expects argument of type ‘int*’, but argument 3 has type ‘long long int*’ [-Wformat=] fscanf(f, "%d", &n); ^ user.cpp:61:22: warning: format ‘%d’ expects argument of type ‘int’, but argument 3 has type ‘long long int’ [-Wformat=] fprintf(g, "%d", z.d); ^ user.cpp:57:6: warning: variable ‘m’ set but not used [-Wunused-but-set-variable] mat m; ^ user.cpp:52:21: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &n); ^