Compilare: user.c: In function ‘main’: user.c:23:19: warning: unused variable ‘nr’ [-Wunused-variable] int i,j,n,m,s,nr,x,p=1; ^ user.c:23:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j,n,m,s,nr,x,p=1; ^ user.c:26:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d%d%d" ,&n,&m,&s); ^ user.c:28:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d%d" ,&x,&y[p]); ^