Compilare: user.c: In function ‘main’: user.c:22:10: warning: unused variable ‘l’ [-Wunused-variable] int k,kk,l; ^ user.c:22:7: warning: unused variable ‘kk’ [-Wunused-variable] int k,kk,l; ^ user.c:27:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&n); ^ user.c:33:19: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&nr); ^