如何从函数返回单个类型

function getValue() {
  return 42;
}

var result = getValue();
console.log(result); // 输出 42

def get_data():
  data = {"name": "John", "age": 30}
  return data

result = get_data()
print(result)  # 输出 {'name': 'John', 'age': 30}

#include <iostream>
#include <string>

std::string result;

void set_result() {
  result = "Hello, world!";
}

int main() {
  set_result();
  std::cout << result << std::endl;  // 输出 Hello, world!
  return 0;
}

void sum(int a, int b, ref int result) {
  result = a + b;
}

int main() {
  int result = 0;
  sum(2, 3, ref result);
  Console.WriteLine(result);  // 输出 5
  return 0;
}