Eroare de compilare: user.c: In function ‘po’: user.c:10:25: error: ‘mod’ undeclared (first use in this function) sol = sol*x%mod; ^ user.c:10:25: note: each undeclared identifier is reported only once for each function it appears in user.c: In function ‘main’: user.c:29:16: error: ‘mod’ undeclared (first use in this function) SOL %= mod; ^ user.c:38:5: error: expected ‘;’ before ‘return’ return 0; ^ user.c:19:5: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d%d", &n, &k ); ^