Function overloading in c++
- 1. G.BALAJI MCA,M.Tech., Assistant Professor Of Computer Science, Vivekanada College,Madurai.
- 2. In C language we cannot make functions using same name. But in C++ we can use function with same name. For eg: void add(); int add(); In C language, It’s not allowed in functions using same name in same program In C++ it’s allowed in same program but this is wrong too... They obey the function are some conditions
- 3. Function overloading is defined as two or more functions having same name but they should be differ in arguments. For eg: Void add(); Void add(int a); int add(double a); Void add (int a,int b); These all are valid functions in the same program. In this program four function have same name with different arguments. Void & int is return type in this program but return type is doesn’t matter here. Arguments make the functions unique.
- 4. # include<iostream> void add(int a,int b) { cout<<“ the addition of two numbers is “<<a+b<<endl; } void add(double a,double b) { cout<<“ the addition of two numbers is “<<a+b<<endl; } void main() { int first,second; double fir,sec; cout<< “enter two integers”<<endl; cin>>first>>second; //we take input from user. add(first,second); cout<<“ enter two doubles value:”<<endl; cin>>fir>>sec; //we take input from user. add(fir,sec);}
- 5. In this program, void add (int a, int b); void add (double a, double b); Two different function with same name & different arguments. add (first, second); add (fir,sec); We dont have to specify which function should be run. Complier automatically decides depending on types.