c++ - Creating a Struct then passing a vector with those struct by reference -

i start off saying there many questions asked me quit hard understand explanations unless deals situation.

here: full questions program working on.

11.7: customer accounts write program uses structure store following data customer account:

 customer name   customer address  city  state  zip code  telephone  account balance  date of last payment 

the program should use array of @ least 20 structures. should let user enter data array , change contents of element , , display data stored in array . program should have menu-driven user interface.

here example code because pasting full code b/c had go through , add 4 spaces @ beginning of each line.

#include <iostream> #include <vector> #include <string> using namespace std;  struct customeraccount{         string customername;         string customeraddress;         string customercity;         string customerstate;         int customerzipcode;         string customertelephone;         double customeraccountbalance;         string customerdateoflastpayment; };  void testfunction(vector<customeraccount> &stuff){     stuff.push_back(customeraccount());     stuff[0].customername = "dale";     stuff[0].customeraddress = "123 test road";     stuff[0].customercity = "fake city";     stuff[0].customerstate = "`merica";     stuff[0].customerzipcode = 12345;     stuff[0].customertelephone = "123-456-7899";     stuff[0].customeraccountbalance = 200.20;     stuff[0].customerdateoflastpayment = "11/5/2016"; };    int main(){     vector<customeraccount> stuff;     //testfunction(vector<customeraccount> &stuff); ---incorrect way (thank mkmostafa)     testfunction(stuff); //the correct way     cout << stuff[0].customername << endl;  }; 

basically

1: create vector.

2: each element in vector has structure , associated data.

3: modify data in elements using functions, need pass vector reference.

side notes

i love have program take in customers name , have vector element called that.

an example instead of stuff[0].customerzipcode, stuff[janet].customerzipcode , either able edit or see information. have not clue how side note cool know how do.

    #include <iostream> #include <vector> #include <string> using namespace std;  struct customeraccount{         string customername;         string customeraddress;         string customercity;         string customerstate;         int customerzipcode;         string customertelephone;         double customeraccountbalance;         string customerdateoflastpayment; };  void newcustomeraccount(vector<customeraccount> &custacct){     string newcustomername, newcustomeraddress, newcustomercity, newcustomerstate, newcustomertelephone, newcustomerdateoflastpayment;     int newcustomerzipcode;     custacct.push_back(customeraccount());     double newcustomeraccountbalance;     int id = custacct.size();      cout << endl;     cout << "customer name: ";     cin >> newcustomername;     custacct.customername = newcustomername;     cout << "test" << endl;     cout << endl;   };   void customermenu(vector<customeraccount> &custacct){     int customerchoice;      cout << "=======menu=======" << endl;     cout << "1. enter new account information" << endl;     cout << "2. change account information" << endl;     cout << "3. display account information" << endl;     cout << "4. exit program " << endl;     cout << "make selection" << endl;     cin >> customerchoice;      switch(customerchoice){     case(1):         //"enter new account information         cout << "you have chosen enter new account information" << endl;         newcustomeraccount(custacct);          break;     case(2):         //change account information         cout << "you have chosen change account information" << endl;          break;     case(3):         //display account information         cout << "you have chosen display account information" <<   endl;          break;     case(4):         //exit program         cout << "you have chosen exit program" << endl;         cout << "bye!" << endl;         cout << "the size of array is: " << custacct.size() << endl;         break;      default:         cout << "you did not make valid selection" << endl;         customermenu(custacct);         break;     };  };    int main() {     vector<customeraccount> custacct;     customermenu(custacct);    return 0; } 

you declaring testfunction take vector reference. need change call in main

testfunction(stuff); 

for side note can use map not vector.

#include <map> int main(){   std::map<std::string, customer> m;    m["janet"].name = "janet"   // set rest  }