Compilare: main.c: In function 'main': main.c:91:12: warning: unused variable 'a' [-Wunused-variable] int n, a=1; ^ main.c:92:5: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(pf, "%d", &n); ^~~~~~~~~~~~~~~~~~~~ main.c:96:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(pf, "%d", &nou->key); ^~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:103:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(pf, "%d", &nou->key); ^~~~~~~~~~~~~~~~~~~~~~~~~~~