Compilare: user.c: In function ‘search1’: user.c:44: warning: unused variable ‘n’ user.c: In function ‘main’: user.c:79: warning: unused variable ‘j’ user.c:77: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result user.c:78: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result user.c:80: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result user.c:82: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result user.c:83: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result user.c:85: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result