C++ Function Overloading overloaded plus() function.

#include <iostream>
#include <string>

using std::string;

int plus(int a, int b);

double plus(double x, double y);

string plus(string s1, string s2);/*from w w  w .  j a  va2  s.co m*/

int main(){
  int n {plus(3, 4)};
  std::cout << "plus(3, 4) returns " << n << std::endl;

  double d {plus(3.2, 4.2)};
  std::cout << "plus(3.2, 4.2) returns " << d << std::endl;

  string s {plus("he", "llo")};
  std::cout << "plus(\"he\", \"llo\") returns " << s << std::endl;

  string s1 {"aaa"};
  string s2 {"bbb"};
  string s3 {plus(s1, s2)};

  std::cout << "With s1 as " << s1 << " and s2 as " << s2 << std::endl;

  std::cout << "plus(s1, s2) returns " << s3 << std::endl;

}

inline int plus(int a, int b){
  return a + b;
}

inline double plus(double x, double y){
  return x + y;
}

inline string plus(string s1, string s2){
  return s1 + s2;
}