使用 stdvector

std::vector 可用于返回相同类型的动态数量的变量。以下示例使用 int 作为数据类型，但 std::vector 可以包含任何可轻松复制的类型：

#include <vector>
#include <iostream>

// the following function returns all integers between and including 'a' and 'b' in a vector
// (the function can return up to std::vector::max_size elements with the vector, given that
// the system's main memory can hold that many items)
std::vector<int> fillVectorFrom(int a, int b) {
    std::vector<int> temp;
    for (int i = a; i <= b; i++) {
        temp.push_back(i);
    }
    return temp;
}

int main() {    
    // assigns the filled vector created inside the function to the new vector 'v'
    std::vector<int> v = fillVectorFrom(1, 10);

    // prints "1 2 3 4 5 6 7 8 9 10 "
    for (int i = 0; i < v.size(); i++) {
        std::cout << v[i] << " ";
    }
    std::cout << std::endl;
    return 0;
}