Compilare: main.c: In function 'main': main.c:27:16: warning: unused variable 'n' [-Wunused-variable] long long S, n; ^ main.c:27:13: warning: unused variable 'S' [-Wunused-variable] long long S, n; ^ main.c:26:46: warning: unused variable 'invmod' [-Wunused-variable] int q, i, exp, k, d, nrd, expc, maxk, pow, invmod; ^~~~~~ main.c:26:41: warning: unused variable 'pow' [-Wunused-variable] int q, i, exp, k, d, nrd, expc, maxk, pow, invmod; ^~~ main.c:26:35: warning: variable 'maxk' set but not used [-Wunused-but-set-variable] int q, i, exp, k, d, nrd, expc, maxk, pow, invmod; ^~~~ main.c:26:29: warning: unused variable 'expc' [-Wunused-variable] int q, i, exp, k, d, nrd, expc, maxk, pow, invmod; ^~~~ main.c:26:24: warning: unused variable 'nrd' [-Wunused-variable] int q, i, exp, k, d, nrd, expc, maxk, pow, invmod; ^~~ main.c:26:13: warning: unused variable 'exp' [-Wunused-variable] int q, i, exp, k, d, nrd, expc, maxk, pow, invmod; ^~~ main.c:44:3: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d", &q ); ^~~~~~~~~~~~~~~~~~~~~~~