Compilare: main.c: In function 'main': main.c:8:11: warning: unused variable 'out' [-Wunused-variable] FILE *out = freopen("royfloyd.out", "w", stdout); ^~~ main.c:7:11: warning: unused variable 'in' [-Wunused-variable] FILE *in = freopen("royfloyd.in", "r", stdin); ^~ main.c:10:5: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^~~~~~~~~~~~~~~ main.c:14:13: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &a[i][j]); ^~~~~~~~~~~~~~~~~~~~~