C++ Zip code and population (class templates)
Define a class StatePair with two template types (T1 and T2), a constructor, mutators, accessors, and a PrintInfo() method. Three vectors have been pre-filled with StatePair data in main():
vector> zipCodeState: ZIP code - state abbreviation pairs
vector> abbrevState: state abbreviation - state name pairs
vector> statePopulation: state name - population pairs
Complete main() to use an input ZIP code to retrieve the correct state abbreviation from the vector zipCodeState. Then use the state abbreviation to retrieve the state name from the vector abbrevState. Lastly, use the state name to retrieve the correct state name/population pair from the vector statePopulation and output the pair.
Ex: If the input is:
21044
the output is:
Maryland: 6079602
//main. cpp
#include
#include
#include
#include
#include "StatePair. h"
using namespace std;
int main() {
ifstream inFS; // File input stream
int zip;
int population;
string abbrev;
string state;
unsigned int i;
// ZIP code - state abbrev. pairs
vector> zipCodeState;
// state abbrev. - state name pairs
vector> abbrevState;
// state name - population pairs
vector> statePopulation;
// Fill the three ArrayLists
// Try to open zip_code_state. txt file
inFS. open("zip_code_state. txt");
if (!inFS. is_open()) {
cout << "Could not open file zip_code_state. txt." << endl;
return 1; // 1 indicates error
}
while (!inFS. eof()) {
StatePair temp;
inFS >> zip;
if (!inFS. fail()) {
temp. SetKey(zip);
}
inFS >> abbrev;
if (!inFS. fail()) {
temp. SetValue(abbrev);
}
zipCodeState. push_back(temp);
}
inFS. close();
// Try to open abbreviation_state. txt file
inFS. open("abbreviation_state. txt");
if (!inFS. is_open()) {
cout << "Could not open file abbreviation_state. txt." << endl;
return 1; // 1 indicates error
}
while (!inFS. eof()) {
StatePair temp;
inFS >> abbrev;
if (!inFS. fail()) {
temp. SetKey(abbrev);
}
getline(inFS, state); //flushes endline
getline(inFS, state);
state = state. substr(0, state. size()-1);
if (!inFS. fail()) {
temp. SetValue(state);
}
abbrevState. push_back(temp);
}
inFS. close();
// Try to open state_population. txt file
inFS. open("state_population. txt");
if (!inFS. is_open()) {
cout << "Could not open file state_population. txt." << endl;
return 1; // 1 indicates error
}
while (!inFS. eof()) {
StatePair temp;
getline(inFS, state);
state = state. substr(0, state. size()-1);
if (!inFS. fail()) {
temp. SetKey(state);
}
inFS >> population;
if (!inFS. fail()) {
temp. SetValue(population);
}
getline(inFS, state); //flushes endline
statePopulation. push_back(temp);
}
inFS. close();
cin >> zip;
for (i = 0; i < zipCodeState. size(); ++i) {
// TODO: Using ZIP code, find state abbreviation
if(zipCodeState. get(i).getValue1() == myZipCode)
{
stateAbbre = zipCodeState. get(i).getValue2();
break;
}
}
for (i = 0; i < abbrevState. size(); ++i) {
// TODO: Using state abbreviation, find state name
}
for (i = 0; i < statePopulation. size(); ++i) {
// TODO: Using state name, find population. Print pair info.
}
}
//StatePair. h
#ifndef STATEPAIR
#define STATEPAIR
template
class StatePair {
// TODO: Define a constructor, mutators, and accessors
// for StatePair
// TODO: Define PrintInfo() method
};
#endif