Compiled successfully but prints nothing

#1

playing with bits, Bitmasking

#2 
for(j=a[i];j<=b[i];j++)
		{
			while(j>0)
			{
				sum = sum+(j&1);
				j=j>>1;
			}
		}

In thids part, running for and while loops with same j???
This would never terminate.

#3

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