Function Overloading in C++: Multiple Signatures for One Function Name

#include <iostream>
#include <string>

// Overload 1: Integer addition
int calculateSum(int a, int b) {
    return a + b;
}

// Overload 2: Double addition
double calculateSum(double a, double b) {
    return a + b;
}

// Overload 3: String concatenation
std::string calculateSum(const std::string& a, const std::string& b) {
    return a + " " + b;
}

int main() {
    std::cout << "Int Sum: " << calculateSum(10, 20) << "
";
    std::cout << "Double Sum: " << calculateSum(5.25, 3.75) << "
";
    std::cout << "String Concatenation: " << calculateSum(std::string("Hello"), std::string("C++")) << "
";
    return 0;
}