Double of 12 is 24

Double of A is AA

Code Understanding

void printdouble(int x) { cout<<2*x<<endl; }
This function simply prints the double value of integer parameter passed to it.

void printdouble(char c) {cout<<c<<c<<endl;}
This function print the passed character twice one after another.

int main(){
int a=12; char ch=’A’;
Appropriate variables are declared.

cout<<“Double of “<<a<<” is “; printdouble(a);
Integer doubling variation of overloaded function is used as passed parameter is an integer.

cout<<“Double of “<<ch<<” is “;  printdouble(ch);
Character printing one after the another variation of overloaded function is used as passed parameter is a character.

return 0;}

Notes

• Functions overloading may not be considered as type of polymorphism by purists as compiler itself identifies two different functions and which reference is to be called is decided at the compile time only. Some other experts have called it adhoc polymorphism.

Common Errors

• Some time programmers try to define overloading with just different return data types. For function overloading function signature (parameter data type, parameter count, parameter order) must be different.

Suggested Filename(s): func-ol.cpp,function-overloading.cpp