Compilare: user.c: In function ‘main’: user.c:12:28: warning: unused variable ‘imax2’ [-Wunused-variable] int i=0,lasti=0,imax=0,imax2=1; for(;i<n;i++)fscanf(f,"%c",&note[i]); ^ user.c:6:29: warning: variable ‘max2’ set but not used [-Wunused-but-set-variable] char *note,*concert,max,max2; int n,m,len=0;; ^ user.c:8:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d",&n,&m); ^ user.c:11:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%c",&note[0]); ^ user.c:12:56: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] int i=0,lasti=0,imax=0,imax2=1; for(;i<n;i++)fscanf(f,"%c",&note[i]); ^