How to deal with functions of different parameter types in C++ function overloading?

C Function overloading allows different function parameters with the same name: different parameter lists (type, number, order) and return types can be the same or different. When dealing with functions of different parameter types, the compiler uses parameter deduction and type conversion to determine the overload to be called. function.

In C, function overloading allows us to have multiple functions with the same name but different parameters. When a function is called, the compiler determines which overloaded function to call based on the parameter types.

Rules for function overloading:

• The function names must be the same
• The parameter lists must be different (parameter type, number or order)
• Return types can be the same or different

Handling functions with different parameter types:

When processing functions with different parameter types, compile The compiler uses parameter deduction and type conversion to determine which overloaded function to call.

• Parameter derivation: The compiler will automatically match the parameters to the parameters of the function according to the parameters of the call.
• Type conversion: The compiler will try to implicitly convert the parameter to the type of the overloaded function parameter.

Practical case:

The following code shows how to handle function overloading with different parameter types:

#include <iostream>

using namespace std;

// 字符串反转
void reverse(string& str) {
    reverse(str.begin(), str.end());
}

// 数组反转
void reverse(int* array, int size) {
    for (int i = 0; i < size / 2; i++) {
        swap(array[i], array[size - i - 1]);
    }
}

int main() {
    // 将字符串反转
    string str = "Hello";
    reverse(str);
    cout << "反转后的字符串：" << str << endl;

    // 将数组反转
    int array[] = {1, 2, 3, 4, 5};
    int size = sizeof(array) / sizeof(array[0]);
    reverse(array, size);
    cout << "反转后的数组：";
    for (int i = 0; i < size; i++) {
        cout << array[i] << " ";
    }

    return 0;
}

In the above example , we created two reverse functions:

• reverse(string&): Reverse a string
• reverse (int* array, int size): Reverse a numeric array

In the main function, we call the reverse function to reverse Strings and arrays.

Through parameter deduction, the compiler can determine the overloaded function to be called based on the parameter type. For strings, it calls reverse(string&), and for arrays, it calls reverse(int* array, int size).

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