Compilare: user.c: In function ‘main’: user.c:7:6: warning: unused variable ‘ch’ [-Wunused-variable] char ch; ^ user.c:6:36: warning: unused variable ‘base’ [-Wunused-variable] int B, K, i, result=0, len, digit, base=1; ^ user.c:6:29: warning: unused variable ‘digit’ [-Wunused-variable] int B, K, i, result=0, len, digit, base=1; ^ user.c:6:24: warning: unused variable ‘len’ [-Wunused-variable] int B, K, i, result=0, len, digit, base=1; ^ user.c:6:11: warning: unused variable ‘i’ [-Wunused-variable] int B, K, i, result=0, len, digit, base=1; ^ user.c:12:7: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(file1, "%d %d", &B, &K); ^