Compilare: main.c: In function 'main': main.c:131:16: warning: variable 'out' set but not used [-Wunused-but-set-variable] FILE *in, *out; ^~~ main.c:130:20: warning: unused variable 'instr' [-Wunused-variable] int N, val, i, instr; ^~~~~ main.c:130:17: warning: unused variable 'i' [-Wunused-variable] int N, val, i, instr; ^ main.c:130:12: warning: unused variable 'val' [-Wunused-variable] int N, val, i, instr; ^~~ main.c:129:11: warning: unused variable 'my_heap' [-Wunused-variable] HEAP *my_heap; ^~~~~~~ main.c:134:5: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &N); ^~~~~~~~~~~~~~~~~~~~