Eroare de compilare: user.c:11: error: expected specifier-qualifier-list before ‘nod’ user.c: In function ‘add’: user.c:22: error: ‘struct nod’ has no member named ‘next’ user.c: In function ‘df’: user.c:29: error: ‘for’ loop initial declarations are only allowed in C99 mode user.c:29: note: use option -std=c99 or -std=gnu99 to compile your code user.c:29: error: ‘struct nod’ has no member named ‘next’ user.c: In function ‘afi’: user.c:37: error: ‘for’ loop initial declarations are only allowed in C99 mode user.c:37: error: ‘struct nod’ has no member named ‘next’ user.c:36: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result user.c: In function ‘main’: user.c:56: error: ‘struct nod’ has no member named ‘next’ user.c:61: error: ‘for’ loop initial declarations are only allowed in C99 mode user.c:49: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result user.c:50: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result user.c:53: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result