Function Overloading in C++ programming language

Function Overloading
• Overloading🡪 refers to the use of same thing
for different purpose
• Function overloading-> We can use the same
function name to perform a verity of different
task
• Provided that the function should vary the
number or types of the arguments

Using the concept of function ovaerloading
• We can design functions with same function
name but with different argument list
• Difference in
• Type or
• number of arguments

Examples
function prototype /declaration
• int add(int a,int b);
• int add(int a,int b,int c);
• float add(float a,int b);

Function call
• add(5,10);
• add(5,6,3);
• add(4.6,7.9);

Function definition
int add (int a, int d)
{
int c ;
c=a+d;
return c
}
int add (int a, int d,int e)
{
int c ;
c=a+d+e;
return c
}
******************
float add (float a, int d)
{
float c ;
c=a+d;
return c
}

• The function would perform different
operations depending on the argument list in
the function call

#include<iostream.h>
float volume(float l);
float volume(float r,float h);
float volume(float l,float b,float h);
void main()
{
float l,r,b,h,t;
clrscr();
cout<<“nEnter the Length of Cube: n”;
cin>>l;
t=volume(l);
cout<<“nnVolume of Cube: “<<t;
cout<<“nnEnter the Radius & Hieght of
Cylinder: n”;
cin>>r>>h;
t=volume(r,h);
cout<<“nnVolume of Cylinder: “<<t;
cout<<“nnEnter the Length,Breadth & Hieght of
Rectangle: n”;
cin>>l>>b>>h;
t=volume(l,b,h);
cout<<“nnVolume of Rectangle: “<<t;
getch();
}
float volume(float l) //Cube
{
float f;
f=l*l*l;
return f;
}
float volume(float r,float h)
//Cylinder
{
float vl=3.14*r*h;
return vl;
}
float volume(float l,float b,float h)
{ float f=l*b*h;
return f;
}

• Function Overloading is an example of
compile time polymorphism

Function Overloading in C++ programming language

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