C++ Programming Code Examples
C++ > Recursion Code Examples
Direct recursion vs indirect recursion
/* Direct recursion vs indirect recursion
Direct recursion: When function calls itself, it is called direct recursion, the example we have seen above is a direct recursion example.
Indirect recursion: When function calls another function and that function calls the calling function, then this is called indirect recursion. For example: function A calls function B and Function B calls function A.
Indirect Recursion Example in C++ */
#include <iostream>
using namespace std;
int fa(int);
int fb(int);
int fa(int n){
if(n<=1)
return 1;
else
return n*fb(n-1);
}
int fb(int n){
if(n<=1)
return 1;
else
return n*fa(n-1);
}
int main(){
int num=5;
cout<<fa(num);
return 0;
}
Consider a situation, when we have two persons with the same name, jhon, in the same class. Whenever we need to differentiate them definitely we would have to use some additional information along with their name, like either the area, if they live in different area or their mother's or father's name, etc. Same situation can arise in your C++ applications. For example, you might be writing some code that has a function called xyz() and there is another library available which is also having same function xyz(). Now the compiler has no way of knowing which version of xyz() function you are referring to within your code.
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