Answer Posted / gg

Error::invalid lvalue in assignment
for both the statements followed by IF & ELSE .

coz zap is a function name.And trying to assign a value.

if the Code is :
int zap(int n)
{
int zap1;
if(n<=1)
(zap1 = 1);
else
(zap1 = zap(n-3)+zap(n-1));
}
Ans Is :: 1


If the Code is :
int zap(int n)
{
int zap1;
if(n<=1)
return (zap1 = 1);
else
return (zap1 = zap(n-3)+zap(n-1));
}
Ans Is ::9

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