Compilare: user.c:51:5: warning: conflicting types for built-in function ‘pow’ [enabled by default] int pow(int *A, int *B, int *C, int n) { ^ user.c: In function ‘pow’: user.c:54:9: warning: ‘return’ with no value, in function returning non-void [enabled by default] return; ^ user.c: In function ‘put’: user.c:32:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.c: In function ‘prod’: user.c:48:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.c: In function ‘main’: user.c:81:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("blas.in", "r", stdin); ^ user.c:82:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("blas.out", "w", stdout); ^ user.c:85:10: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%i", &t); ^ user.c:88:14: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%i", &n); ^