Compilare: user.c: In function ‘main’: user.c:13:9: warning: left-hand operand of comma expression has no effect [-Wunused-value] if(a,b>50000000 || a,b<0) ^ user.c:13:25: warning: left-hand operand of comma expression has no effect [-Wunused-value] if(a,b>50000000 || a,b<0) ^ user.c:10:5: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&a); ^ user.c:12:5: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&b); ^