Compilare: user.c: In function ‘main’: user.c:32:16: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] else if(v[i] == 0 & ok == 0) ^ user.c:11:8: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(d,"%d",&N); ^ user.c:16:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(d,"%d",&v[i]); ^