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

Since you are starting, I am going to suggest changing your code a little bit:

#include 
using namespace std;

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

// Function that does the core work.
void read_input_print_sum()
{
   float num1;
   float num2;    

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

   cout<< "your sum is: "<

Now, you can add various methods to call the core function repeatedly. One has been suggested in the answer by Rakibul Hassan.

That can be implemented with:

int main()
{
   while (true)
   {
     read_input_print_sum();
   }
   system("pause");    
}

Another way: Ask the use whether they want do the work again.

bool getRepeat()
{
  cout << "Do you want to repeat? (Y/N): ";
  int yesno = cin.getc();
  return ( yesno == 'Y' || yesno == 'y' );
}

int main()
{
   bool repeat = true;
   while (repeat)
   {
     read_input_print_sum();
     repeat = getRepeat();
   }
   system("pause");    
}

Another way: Ask the number of times they wish to repeat the computation before you start.

int main()
{
   int N = 0;
   cout << "How may times do you want to add numbers: ";
   cin >> N;

   for ( int i = 0; i <= N; ++i )
   {
     read_input_print_sum();
   }
   system("pause");    
}