Cpp program

Question

How can i make a unique id for the single name on reservation system using c++ program

Answer 1

Please explain your question in a plain manner.

Answer 2

By using a pseudo random number generator and a map container (really convenient for pairs and also it has some mechanism to check duplicate keys (IDs)) like this snippet.

#include <map>
#include <random>
#include <string>
//...

random_device rd;
mt19937 gen( rd() );

int main() {

string names[10] = {"boo","doo","koo","moo","joo","foo","loo","zoo","xoo","roo"};

map <int, string> rec;
uniform_int_distribution<> ID(1000, 9999);

for (auto i = 0; i < 10; ++i)
rec.insert( make_pair(ID(gen), names[i]) );

}

insert won't replace already added keys (IDs)