Compilare: user.c: In function ‘corp’: user.c:50:14: warning: type defaults to ‘int’ in declaration of ‘i’ [enabled by default] register i, a = 0, p = 0; ^ user.c:50:17: warning: type defaults to ‘int’ in declaration of ‘a’ [enabled by default] register i, a = 0, p = 0; ^ user.c:50:24: warning: type defaults to ‘int’ in declaration of ‘p’ [enabled by default] register i, a = 0, p = 0; ^ user.c: In function ‘headers’: user.c:17:14: warning: ignoring return value of ‘fgets’, declared with attribute warn_unused_result [-Wunused-result] fgets(buffer, 1024, f); ^ user.c: In function ‘main’: user.c:102:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("convertor.out", "w", stdout); ^