Compilare: user.c: In function ‘convert’: user.c:23:6: warning: unused variable ‘i’ [-Wunused-variable] int i; ^ user.c: In function ‘start’: user.c:82:2: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(rf, "%d", &n); ^~~~~~~~~~~~~~~~~~~~ user.c:84:3: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(rf, "%d", &number); ^~~~~~~~~~~~~~~~~~~~~~~~~