Compilare: user.c: In function ‘main’: user.c:27:18: warning: unused variable ‘sb’ [-Wunused-variable] int a,b,i,sa,sb; ^ user.c:27:15: warning: unused variable ‘sa’ [-Wunused-variable] int a,b,i,sa,sb; ^ user.c:27:13: warning: unused variable ‘i’ [-Wunused-variable] int a,b,i,sa,sb; ^ user.c:29:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d",&a,&b); ^