Compilare: user.c: In function ‘fft’: user.c:23:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j = 0; ^ user.c: In function ‘getch’: user.c:76:14: warning: ignoring return value of ‘fread’, declared with attribute warn_unused_result [-Wunused-result] fread(buff, size, 1, stdin); ^ user.c: In function ‘main’: user.c:95:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("bacterii2.in", "r", stdin); ^ user.c:96:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("bacterii2.out", "w", stdout); ^