Compilare: user.c: In function ‘main’: user.c:8:17: warning: unused variable ‘j’ [-Wunused-variable] int n,a,b,i,j,max,max1,con,prod; ^ user.c:11:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d" ,&n); ^ user.c:14:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d%d" ,&a,&b); ^