Borderou de evaluare (job #543242)

Eroare de compilare: user.c: In function ‘put4’: user.c:7:5: error: ‘for’ loop initial declarations are only allowed in C99 mode user.c:7:5: note: use option -std=c99 or -std=gnu99 to compile your code user.c:8:9: error: ‘for’ loop initial declarations are only allowed in C99 mode user.c: In function ‘main’: user.c:19:5: error: ‘for’ loop initial declarations are only allowed in C99 mode user.c:24:13: error: redefinition of ‘i’ user.c:19:13: note: previous definition of ‘i’ was here user.c:24:5: error: ‘for’ loop initial declarations are only allowed in C99 mode user.c:26:9: error: ‘for’ loop initial declarations are only allowed in C99 mode user.c:17:10: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] user.c:18:10: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] user.c:20:14: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result]