Output of program

Question

void PrintNumber(unsigned int N)
{
printf("%u\t", N);
}
void PrintValue (unsigned int N) 
{
if (N>=10)
{
PrintValue(N/10);
}
PrintNumber(N%10);
}

int main()
{
PrintValue(1234);
return 0;
}

The output of the above program is:

1.   2 & 4
2.   2 & 3
3.   1 & 3
    
4.   1 & 4

How to choose between Option 3 and 4? 

Comments

i think base condition means termination condition:

this program working on unsigned integers and its getting terminated when values in between {0 to 9}

option 3 only satisfy

option 4 : says it get terminated in range of {1 to 9 } which is wrong because on "0" it also getting termintaed.

Answer 1

If you observe carefully. Value of N passed changes like

N --->N/10 --->N/10² ---> N/10³ --- and so on.

you can build a recursive function  

 

for the above function There is no meaning in deciding 0 < N < 10 as base condition because if N = 0 if condition fails T(N/10) = 0/10 = 0 which again calls T(N/10) = 0/10 = 0 and so on. Therefore we want to stop further execution once zero has occurred therefore we put zero in base condition.

Happy learning :)  

Answer 2

1 and 3 is correct because the recursion should stop when n is zero.