Compilare: user.cpp: In function ‘int main()’: user.cpp:55:29: warning: format ‘%s’ expects argument of type ‘char*’, but argument 3 has type ‘char (*)[305]’ [-Wformat=] fscanf(f, "%s\n", &s); ^ user.cpp:63:29: warning: format ‘%s’ expects argument of type ‘char*’, but argument 3 has type ‘char (*)[305]’ [-Wformat=] fscanf(f, "%s\n", &s); ^ user.cpp:51:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d\n", &x); int n =3; ^ user.cpp:55:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%s\n", &s); ^ user.cpp:61:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d\n", &n); ^ user.cpp:63:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%s\n", &s); ^