Compilare: user.c: In function ‘main’: user.c:6:31: warning: unused variable ‘j’ [-Wunused-variable] int i,n,st,dr,mij,k,x,m,s,j,nr; ^ user.c:6:25: warning: unused variable ‘x’ [-Wunused-variable] int i,n,st,dr,mij,k,x,m,s,j,nr; ^ user.c:10:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d%d" ,&n,&k); ^ user.c:13:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d" ,&nr); ^