Compilare: user.c: In function ‘main’: user.c:38:9: warning: ignoring return value of ‘fgets’, declared with attribute warn_unused_result [-Wunused-result] fgets ( v1, MAXLEN, fin ); /// string to be searched ^ user.c:40:9: warning: ignoring return value of ‘fgets’, declared with attribute warn_unused_result [-Wunused-result] fgets ( v2, MAXLEN, fin ); /// string to search inside ^