C++ Figure 6.9 #include #include // contains prototypes for functions srand and rand #include // contains prototype for function time using namespace std; unsigned int rollDice(); // rolls dice, calculates and displays sum int main() { // scoped enumeration with constants that represent the game status enum class Status {CONTINUE, WON, LOST}; // all caps in constants // randomize random number generator using current time srand(static_cast(time(0))); unsigned int myPoint{0}; // point if no win or loss on first roll Status gameStatus; // can be CONTINUE, WON or LOST unsigned int sumOfDice{rollDice()}; // first roll of the dice // determine game status and point (if needed) based on first roll switch (sumOfDice) { case 7: // win with 7 on first roll case 11: // win with 11 on first roll gameStatus = Status::WON; break; case 2: // lose with 2 on first roll case 3: // lose with 3 on first roll case 12: // lose with 12 on first roll gameStatus = Status::LOST; break; default: // did not win or lose, so remember point gameStatus = Status::CONTINUE; // game is not over myPoint = sumOfDice; // remember the point cout << "Point is " << myPoint << endl; break; // optional at end of switch } // while game is not complete while (Status::CONTINUE == gameStatus) { // not WON or LOST sumOfDice = rollDice(); // roll dice again // determine game status if (sumOfDice == myPoint) { // win by making point gameStatus = Status::WON; } else { if (sumOfDice == 7) { // lose by rolling 7 before point gameStatus = Status::LOST; } } } // display won or lost message if (Status::WON == gameStatus) { cout << "Player wins" << endl; } else { cout << "Player loses" << endl; } } // roll dice, calculate sum and display results unsigned int rollDice() { int die1{1 + rand() % 6}; // first die roll int die2{1 + rand() % 6}; // second die roll int sum{die1 + die2}; // compute sum of die values // display results of this roll cout << "Player rolled " << die1 << " + " << die2 << " = " << sum << endl; return sum; }
C++
Figure 6.9
#include <iostream>
#include <cstdlib> // contains prototypes for functions srand and rand
#include <ctime> // contains prototype for function time
using namespace std;
unsigned int rollDice(); // rolls dice, calculates and displays sum
int main() {
// scoped enumeration with constants that represent the game status
enum class Status {CONTINUE, WON, LOST}; // all caps in constants
// randomize random number generator using current time
srand(static_cast<unsigned int>(time(0)));
unsigned int myPoint{0}; // point if no win or loss on first roll
Status gameStatus; // can be CONTINUE, WON or LOST
unsigned int sumOfDice{rollDice()}; // first roll of the dice
// determine game status and point (if needed) based on first roll
switch (sumOfDice) {
case 7: // win with 7 on first roll
case 11: // win with 11 on first roll
gameStatus = Status::WON;
break;
case 2: // lose with 2 on first roll
case 3: // lose with 3 on first roll
case 12: // lose with 12 on first roll
gameStatus = Status::LOST;
break;
default: // did not win or lose, so remember point
gameStatus = Status::CONTINUE; // game is not over
myPoint = sumOfDice; // remember the point
cout << "Point is " << myPoint << endl;
break; // optional at end of switch
}
// while game is not complete
while (Status::CONTINUE == gameStatus) { // not WON or LOST
sumOfDice = rollDice(); // roll dice again
// determine game status
if (sumOfDice == myPoint) { // win by making point
gameStatus = Status::WON;
}
else {
if (sumOfDice == 7) { // lose by rolling 7 before point
gameStatus = Status::LOST;
}
}
}
// display won or lost message
if (Status::WON == gameStatus) {
cout << "Player wins" << endl;
}
else {
cout << "Player loses" << endl;
}
}
// roll dice, calculate sum and display results
unsigned int rollDice() {
int die1{1 + rand() % 6}; // first die roll
int die2{1 + rand() % 6}; // second die roll
int sum{die1 + die2}; // compute sum of die values
// display results of this roll
cout << "Player rolled " << die1 << " + " << die2
<< " = " << sum << endl;
return sum;
}
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