Deleting an element from a vector - c++

Question

I am new to C++ and I am writing a program that is supposed to simulate a colony of bunnies. The program will be able to add them, give them names, ages, colors, etc. Right now I have a working program that will add bunnies after each pass and age them by 1. How could I make the program delete a bunny once the bunny reaches age 10.
The code:
enter code here
#include <iostream>
#include <ctime>
#include <vector>
#include <cstdlib>
#include <limits>
using namespace std;
const int POSSIBLE_NAMES = 18;
const int POSSIBLE_COLORS = 4;
static std::string possibleNames[] ={
"Jen",
"Alex",
"Janice",
"Tom",
"Bob",
"Cassie",
"Louis",
"Frank",
"Bugs",
"Daffy",
"Mickey",
"Minnie",
"Pluto",
"Venus",
"Topanga",
"Corey",
"Francis",
"London",
};
static std::string possibleColors[] ={
"White",
"Brown",
"Black",
"Spotted"
};
struct Bunny
{
public:
string name;
int age;
string color;
char sex;
Bunny(){
setSex();
setColor();
setAge(0);
setName();
}
int randomGeneration(int x){
return rand() % x;
srand (time(NULL));
}
void setSex()
{
int randomNumber = randomGeneration(2);
( randomNumber == 1 ) ? sex = 'm' : sex = 'f';
}
char getSex()
{
return sex;
}
void setColor()
{
int randomNumber = randomGeneration(POSSIBLE_COLORS);
color = possibleColors[randomNumber];
}
string getColor()
{
return color;
}
void setAge(int age)
{
this->age = age;
}
int getAge()
{
age++;
return age;
}
void setName()
{
int i = randomGeneration(POSSIBLE_NAMES);
name = possibleNames[i];
}
string getName()
{
return name;
}
void deleteBunny(){
if (age > 10){
cout << getName() << " has died" << endl;
}
}
void printBunny()
{
cout << "Name: " << getName() << endl;
cout << "Sex: " << getSex() << endl;
cout << "Color: " << getColor() << endl;
cout << "Age: " << getAge() << endl;
}
};
int main()
{
vector< Bunny > colony;
char quit = '\0';
do
{
// Add more bunny
for (int i = 0; i < 5; i++)
{
colony.push_back(Bunny());
}
// Print all the bunny
for (int i =0; i < colony.size(); i++)
{
colony[i].printBunny();
colony[i].deleteBunny();
cout << endl;
}
cout << "You have a total of " << colony.size() << " bunnies\n";
cout << "Press a key to add more bunny, q to quit\n";
quit = cin.get();
cin.ignore(std::numeric_limits<std::streamsize>::max(), '\n');
// repeat
} while (quit != 'q' && quit != 'Q');
return 0;
}

Answer 1

You have to use erase remove idiom:
std::erase(colony.remove_if( colony.begin(), colony.end(),
[] (bunny& oldBunny){ return oldBunny.age > 10; } ), colony.end());

Answer 2

Each pass you need to check if been is over ten and delete them from the vector.
vector< Bunny > colony;
do
{
for(int i = 0; i < colony.size(); i++){
if(colony[i].getAge() > 10) {
// Call your delete function
colony[i].deleteBunny();
// Delete from vector
colony.erase(colony.begin() + i);
// Shift vector back down
i--;
}
}
// Add more bunny
// Rest of code
}