Compilare: main.c: In function 'main': main.c:13:5: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf ( fin, "%d", &n ); ^~~~~~~~~~~~~~~~~~~~~~~~ main.c:15:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf ( fin, "%d", &a ); ^~~~~~~~~~~~~~~~~~~~~~~~ main.c:19:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf ( fin, "%d", &a ); ^~~~~~~~~~~~~~~~~~~~~~~~