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 adds numbers of different types:
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;
}
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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 integers
and doubles:
Example
int plusFunc(int x, int
y) {
return x + y;
}
double plusFunc(double x, double y) {
return x + y;
}
int main() {
int myNum1 = plusFunc(83,
5);
double myNum2 = plusFunc(6.3, 5.2);
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.
