What is the output of the following code fragment?
int f1(int base, int limit)
{
if(base > limit)
return -1;
else
if(base == limit)
return 1;
else
return base * f1(base+1, limit);
}
int main()
{
cout << f1(12,4)<
}
a. 2
b. 3
c. -1
d. 6
c. -1
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