Borderou de evaluare (job #278469)

Eroare de compilare: user.c: In function ‘main’: user.c:42:2: error: ‘for’ loop initial declarations are only allowed in C99 mode user.c:42:2: note: use option -std=c99 or -std=gnu99 to compile your code user.c:46:3: error: ‘for’ loop initial declarations are only allowed in C99 mode user.c:60:5: error: ‘for’ loop initial declarations are only allowed in C99 mode user.c:72:5: error: ‘for’ loop initial declarations are only allowed in C99 mode user.c:105:10: error: redefinition of ‘i’ user.c:42:10: note: previous definition of ‘i’ was here user.c:105:2: error: ‘for’ loop initial declarations are only allowed in C99 mode user.c:32:9: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] user.c:33:9: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] user.c:40:7: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result]