Compilare: user.c: In function ‘search_next’: user.c:21: warning: unused variable ‘var’ user.c: In function ‘main’: user.c:54: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result user.c:64: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result user.c: In function ‘search_next’: user.c:21: warning: ‘i’ may be used uninitialized in this function