C++ Function Overloading
Function Overloading
With function overloading, multiple functions can have the same name with different parameters:
Example
int myFunction(int x)
float myFunction(float x)
double
myFunction(double x, double y)
Consider the following example, which have two functions that add numbers of different type:
Example
int plusFuncInt(int x, int y) {
return x + y;
}
double plusFuncDouble(double x, double y) {
return x + y;
}
int main() {
int myNum1 = plusFuncInt(8,
5);
double myNum2 = plusFuncDouble(4.3, 6.26);
cout <<
"Int: " << myNum1 << "\n";
cout << "Double: " << myNum2;
return 0;
}
Run example »
Instead of defining two functions that should do the same thing, it is better to overload one.
In the example below, we overload the plusFunc function to work for both int
and double:
Example
int plusFunc(int x, int
y) {
return x + y;
}
double plusFunc(double x, double y) {
return x + y;
}
int main() {
int myNum1 = plusFunc(8,
5);
double myNum2 = plusFunc(4.3, 6.26);
cout << "Int: " <<
myNum1 << "\n";
cout << "Double: " << myNum2;
return 0;
}
Run example »
Note: Multiple functions can have the same name as long as the number and/or type of parameters are different.
