Compilare: user.c: In function ‘readHeader’: user.c:17:10: warning: ignoring return value of ‘fgets’, declared with attribute warn_unused_result [-Wunused-result] fgets(buf, sizeof(buf), in); ^ user.c: In function ‘readNumbers’: user.c:25:10: warning: ignoring return value of ‘fgets’, declared with attribute warn_unused_result [-Wunused-result] fgets(buf, sizeof(buf), in); ^ user.c: In function ‘printResult’: user.c:82:1: warning: control reaches end of non-void function [-Wreturn-type] } ^