dict.cpp

#include <vector>
#include <string>
#include <iostream>

struct tuple {
    tuple(std::string name, int age) {
        key = name;
        value = age;
    }
    std::string key;
    int value;
};

int getAge (std::vector<tuple> dict, std::string name){
    for (auto i = dict.begin(); i < dict.end(); i++) {
        if (i->key == name) {
            return i->value;
        }
    }
    return -1;
}

int main(int argc, char const *argv[])
{
    std::vector<tuple> dict = {tuple("John", 32), tuple("Mary", 21), tuple("Josh", 40)};
    std::cout << getAge(dict, "John") << std::endl;

    return 0;
}