Compilare: main.c: In function 'main': main.c:13:18: warning: unused variable 'indc' [-Wunused-variable] int inda, indb, indc; ^~~~ main.c:13:12: warning: unused variable 'indb' [-Wunused-variable] int inda, indb, indc; ^~~~ main.c:7:2: warning: ignoring return value of 'fgets', declared with attribute warn_unused_result [-Wunused-result] fgets(string,50001, file); ^~~~~~~~~~~~~~~~~~~~~~~~~