Compilare: user.c: In function ‘main’: user.c:10:39: warning: unused variable ‘j’ [-Wunused-variable] int n,l,u,i,k,inc=0,fin=0,max,q,r,j; ^ user.c:10:37: warning: unused variable ‘r’ [-Wunused-variable] int n,l,u,i,k,inc=0,fin=0,max,q,r,j; ^ user.c:10:35: warning: unused variable ‘q’ [-Wunused-variable] int n,l,u,i,k,inc=0,fin=0,max,q,r,j; ^ user.c:14:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d%d%d",&n,&l,&u); ^ user.c:16:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d",&k); ^