Compilare: user.c: In function ‘cmmdc’: user.c:4:5: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if ((!a) || (!b)) ^ user.c:14:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.c: In function ‘main’: user.c:21:2: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf (f,"%ld", &a); ^ user.c:22:2: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf (f, "%ld", &b); ^