Compilare: user.c: In function ‘headers’: user.c:21:8: warning: ignoring return value of ‘fgets’, declared with attribute warn_unused_result [-Wunused-result] fgets(buffer, 50, f); ^ user.c: In function ‘corp’: user.c:58:7: warning: ignoring return value of ‘fread’, declared with attribute warn_unused_result [-Wunused-result] fread(buffer, 1, 9999999, f); ^ user.c: In function ‘main’: user.c:108:9: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("convertor.out", "w", stdout); ^