Compilare: user.c:27: warning: return type of ‘main’ is not ‘int’ user.c: In function ‘main’: user.c:35: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result user.c:36: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result user.c:39: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result user.c:40: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result