Borderou de evaluare (job #30602)

Compilare: user.c: In function ‘putere’: user.c:10:5: warning: statement with no effect [-Wunused-value] user.c: In function ‘main’: user.c:20:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] user.c:24:19: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] user.c:14:5: warning: ‘r’ may be used uninitialized in this function [-Wuninitialized]