Compilare: user.c: In function ‘citire’: user.c:25: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result user.c:28: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result user.c: In function ‘main’: user.c:52: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result user.c:53: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result user.c:67: warning: control reaches end of non-void function user.c:54: warning: ‘k’ may be used uninitialized in this function