Borderou de evaluare (job #148671)

Compilare: user.c: In function ‘main’: user.c:12:13: warning: operation on ‘c4’ may be undefined [-Wsequence-point] user.c:11:15: warning: unused variable ‘c3’ [-Wunused-variable] user.c:11:9: warning: variable ‘c1’ set but not used [-Wunused-but-set-variable] user.c:9:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] user.c:26:13: warning: ‘k’ may be used uninitialized in this function [-Wuninitialized]