如何迭代地找到几个名称在C++中只有数字不同的变量？

#include<iostream>
#include<string>

int main() {
    int num_vars = 3;
    for (int i = 1; i <= num_vars; ++i) {
        std::string var_name = "var" + std::to_string(i);
        int value = i * 10;
        std::cout<< var_name << " = "<< value<< std::endl;
    }
    return 0;
}

#include<iostream>
#include<string>
#include <map>

int main() {
    int num_vars = 3;
    std::map<std::string, int> vars;
    for (int i = 1; i <= num_vars; ++i) {
        std::string var_name = "var" + std::to_string(i);
        int value = i * 10;
        vars[var_name] = value;
    }
    for (int i = 1; i <= num_vars; ++i) {
        std::string var_name = "var" + std::to_string(i);
        std::cout<< var_name << " = "<< vars[var_name]<< std::endl;
    }
    return 0;
}