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Write a program to illustrate function overloading. Write 2 overloading functions for adding two numbers.


AIM: Write a C++ program to illustrate a function overloading. Write two Overloading Functions for adding two numbers.


Since functions’ names are in this case the same, we must preserve uniqueness of signatures, by changing something from the parameter list (last three alienees).

If the functions’ signatures are sufficiently different, the compiler can distinguish which function was intended to be used at each occurrence. This process of searching for the appropriate function is called function resolution and can be quite an intensive one, especially if there are a lot of equally named functions.

Programming languages supporting implicit type conventions usually use promotion of arguments (i.e. type casting of integer to floating-point) when there is no exact function match. The demotion of arguments is rarely used.

When two or more functions match the criteria in function resolution process, an ambiguity error is reported by compiler. Adding more information for the compiler by editing the source code (using for example type casting), can address such doubts.

The example code shows how function overloading can be used. As functions do practically the same thing, it makes sense to use function overloading.

function int generateNumber(int MaxValue) {

return rand * MaxValue


function int generateNumber(int MinValue, int MaxValue) {

return MinValue + rand * (MaxValue – MinValue)



using namespace std;
class MFO
   int sum(int,int);
   float sum(float a ,float b)
      return a+b;
int MFO::sum(int a ,int b)
   return a+b;
int main()
   MFO ob;
   cout<<“\n Sum of two integer numbers:”<<ob.sum(10,20);
   cout<<“\n Sum of two float numbers:”<<ob.sum(2.4f,7.1f);

Sum of two integer numbers: 30
Sum of two float numbers: 9.5

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