Question

" Is there any difference between subprogram, functions , methods , subroutines and procedures in C/C++?

Answer 1

Yes there is a difference.  <span />

Answer 2

Well let me explain this to you in a better way. The terms 'subprogram', 'function' and 'method' have all the same meaning in C/C++ but we usually called them functions, and we divide the functions into two types :
1)Function : it's the usual one, as we all know, it returns a value.
  2) General format :
  Type function_name(<arguments>){
               // Your work
               return <value/variable> //Note : the type must be the same as the function
                                                    // type. }
      Example : int Maheen(int a, int b){
             int c = a + b;
            return c;
        }
 Procedure : it's a function but it doesn't return any value, it begins with 'void'.

General format :
       void function_name(<arguments>){
               // Your work
               //Note : There is no return here.
       }
       
Example :
       void Maheen(int a, int b){
             int c = a + b;
            printf("The sum is : %d", c);
        }

I think this can help you greatly