How to start from beginning of the program

Question

I am a very beginner in c++. i am just learning abc of this language.. i created this small program that would add:

#include 
   using namesp         


        

Answer 1

If we were to take "start from the beginning" literally, we can call main() again when we get to the end!

#include 
   using namespace std;

float add(float a, float b){
              return a+b;  
      }

int main(){

    float num1;
    float num2;    

    cout<<"add...enter digits \n";
    cout<<"first digit: ";
    cin>>num1;
    cout<<"\n Second number: ";
    cin>>num2;

    cout<< "your sum is: "<

(This will eventually crash when the program runs out of stack space, but the user will almost certainly get tired of adding numbers long before then. Of course, a clever compiler would realize this is tail recursion, and use a goto instead of a function call.)