Compilare: user.c: In function ‘citire’: user.c:6: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result user.c:7: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result user.c:8: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result user.c:11: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result user.c: In function ‘citire2’: user.c:14: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result user.c:15: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result user.c:16: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result user.c:19: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result