Compilare: user.c: In function ‘read’: user.c:99: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result user.c:102: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result user.c: In function ‘buildTree’: user.c:53: warning: ‘choose[1]’ may be used uninitialized in this function user.c:53: warning: ‘pos[1]’ may be used uninitialized in this function user.c:53: warning: ‘pos[0]’ may be used uninitialized in this function