Borderou de evaluare (job #56898)

Eroare de compilare: user.c: In function ‘back’: user.c:10:5: error: ‘for’ loop initial declarations are only allowed in C99 mode user.c:10:5: note: use option -std=c99 or -std=gnu99 to compile your code user.c: In function ‘main’: user.c:25:2: error: ‘for’ loop initial declarations are only allowed in C99 mode user.c:24:8: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] user.c:26:12: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] user.c:29:1: warning: control reaches end of non-void function [-Wreturn-type]