Compilare: main.c: In function 'main': main.c:66:10: warning: unused variable 'p' [-Wunused-variable] *p; ^ main.c: In function 'inc': main.c:15:10: warning: ignoring return value of 'fread', declared with attribute warn_unused_result [-Wunused-result] fread(buffer, 1, 32000, stdin); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c: In function 'main': main.c:70:5: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen(FIN, "r", stdin); ^~~~~~~~~~~~~~~~~~~~~~~~ main.c:72:5: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen(FOUT, "w", stdout); ^~~~~~~~~~~~~~~~~~~~~~~~~~ main.c: In function '_comb_s': main.c:40:20: warning: 'swapped' may be used uninitialized in this function [-Wmaybe-uninitialized] while(gap > 1 || swapped) { ^~