Question: Write a program in C++ with the following requirements: Give C++ code for performing add(e) and remove(i) functions for game entries stored in an array
Write a program in C++ with the following requirements: Give C++ code for performing add(e) and remove(i) functions for game entries stored in an array a, as in class Scores in Section 3.1.1, except this time, dont maintain the game entries in order. Assume that we still need to keep n entries stored in indices 0 to n 1. Implement the add and remove functions without using any loops, so that the number of steps they perform does not depend on n.
score.cpp
#include "Scores.h"
Scores::Scores(int maxEnt) { // constructor
maxEntries = maxEnt; // save the max size
entries = new GameEntry[maxEntries]; // allocate array storage
numEntries = 0; // initially no elements
}
Scores::~Scores() { // destructor
delete[ ] entries;
}
void Scores::add(const GameEntry& e) { // add a game entry
int newScore = e.getScore(); // score to add
if (numEntries == maxEntries) { // the array is full
if (newScore <= entries[maxEntries-1].getScore())
return; // not high enough - ignore
}
else numEntries++; // if not full, one more entry
int i = numEntries - 2; // start with the next to last
while ( i >= 0 && newScore > entries[i].getScore() ) {
entries[i+1] = entries[i]; // shift right if smaller
i--;
}
entries[i+1] = e; // put e in the empty spot
}
GameEntry Scores::remove(int i) throw(IndexOutOfBounds) {
if ((i < 0) || (i >= numEntries)) // invalid index
throw IndexOutOfBounds("Invalid index");
GameEntry e = entries[i]; // save the removed object
for (int j = i+1; j < numEntries; j++)
entries[j-1] = entries[j]; // shift entries left
numEntries--; // one fewer entry
return e; // return the removed object
}
void Scores::printAll(){
cout< for (int i = 0; i < numEntries; i++) cout< cout< } void Scores::printIndex(int indx)throw(IndexOutOfBounds){ if ((indx < 0) || (indx >= numEntries)) // invalid index throw IndexOutOfBounds("Invalid index"); cout< cout< cout< } ////////////////////////////////////////////////// GameEntries #include "GameEntry.h" GameEntry::GameEntry(const string& n, int s) : name(n), score(s) { } GameEntry::~GameEntry() { // TODO Auto-generated destructor stub } string GameEntry::getName() const { return name; } int GameEntry::getScore() const { return score; } //////////////////////////////////////////// main #include "Scores.h" int main() { Scores scores(4); GameEntry ge1("test0", 5); scores.printAll(); scores.add(ge1); // scores.printAll(); // // GameEntry ge2("mira", 10); // // // // GameEntry ge3("test1", 3); // // GameEntry ge4("test2", 5); // scores.add(ge1); // scores.add(ge2); // scores.printIndex(1); // scores.add(ge3); // scores.add(ge4); // // scores.printAll(); // // scores.remove(1); // scores.remove(1); // scores.printAll(); //// scores.remove(1); //// scores.printAll(); //// scores.remove(1); // scores.remove(1); return 0; }
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