What will be the sum of the digits in the output of the C program given below.

(A) 654321135
(B) 65432112345
(C) 30
(D) 31


Answer: (C)

Explanation:
#include
#include
void A(int n)
{
if(n==0)
return;
printf(\”%d\”,n);
B(–n);
printf(\”%d\”,n);
}

void B(int n)
{
if(n==0)
return;
printf(\”%d\”,n);
A(–n);
}

int main(){
A(6);
return 0;
}

Output of above program is 654321135.

Therefore, sum of digits of given output is,

6+5+4+3+2+1+1+3+5 = 30 

So, option (C) is correct.


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