Borderou de evaluare (job #393145)

Compilare: user.c: In function ‘main’: user.c:11:7: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] user.c:8:17: warning: unused variable ‘c’ [-Wunused-variable] user.c:9:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] user.c:10:10: warning: ‘a’ is used uninitialized in this function [-Wuninitialized] user.c:16:17: warning: ‘b’ may be used uninitialized in this function [-Wuninitialized]