Compilare: main.c: In function 'main': main.c:102:12: warning: unused variable 'a' [-Wunused-variable] int n, a=1; ^ main.c:103:5: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(pf, "%d", &n); ^~~~~~~~~~~~~~~~~~~~ main.c:109:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(pf, "%d", &nou->key); ^~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:119:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(pf, "%d", &nou->key); ^~~~~~~~~~~~~~~~~~~~~~~~~~~