Compilare: user.c: In function ‘read’: user.c:29: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result user.c:37: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result user.c: In function ‘main’: user.c:87: warning: unused variable ‘j’ user.c:90: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result