Eroare de compilare: main.c: In function 'main': main.c:4:5: warning: implicit declaration of function 'freopen' [-Wimplicit-function-declaration] freopen("fact.in", "r", stdin); ^~~~~~~ main.c:4:29: error: 'stdin' undeclared (first use in this function) freopen("fact.in", "r", stdin); ^~~~~ main.c:4:29: note: each undeclared identifier is reported only once for each function it appears in main.c:5:30: error: 'stdout' undeclared (first use in this function) freopen("fact.out", "w", stdout); ^~~~~~ main.c:8:5: warning: implicit declaration of function 'scanf' [-Wimplicit-function-declaration] scanf("%d", &n); ^~~~~ main.c:8:5: warning: incompatible implicit declaration of built-in function 'scanf' main.c:8:5: note: include '<stdio.h>' or provide a declaration of 'scanf' main.c:17:5: warning: implicit declaration of function 'printf' [-Wimplicit-function-declaration] printf("%d\n", num); ^~~~~~ main.c:17:5: warning: incompatible implicit declaration of built-in function 'printf' main.c:17:5: note: include '<stdio.h>' or provide a declaration of 'printf' Non zero exit status: 1