Compilare: user.c: In function ‘main’: user.c:18:5: warning: implicit declaration of function ‘pow’ [-Wimplicit-function-declaration] s = pow(a,b); ^ user.c:18:9: warning: incompatible implicit declaration of built-in function ‘pow’ [enabled by default] s = pow(a,b); ^ user.c:19:5: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘long long unsigned int’ [-Wformat=] printf("%d",s); ^ user.c:9:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen(in, "r", stdin); ^ user.c:10:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen(out, "w", stdout); ^ user.c:11:10: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%llu%llu%d",&a,&b,&p); ^