Compilare: user.c: In function ‘main’: user.c:40:5: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf ( fin, "%d%d", &n, &m ); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ user.c:45:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf ( fin, "%d%d", &x, &y ); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~