Borderou de evaluare (job #575013)

Eroare de compilare: user.c: In function ‘readInt’: user.c:17:5: warning: implicit declaration of function ‘isdigit’ [-Wimplicit-function-declaration] user.c: In function ‘main’: user.c:31:5: error: ‘for’ loop initial declarations are only allowed in C99 mode user.c:31:5: note: use option -std=c99 or -std=gnu99 to compile your code user.c:60:13: error: redefinition of ‘i’ user.c:31:13: note: previous definition of ‘i’ was here user.c:60:5: error: ‘for’ loop initial declarations are only allowed in C99 mode