Adding Bombs to the Minesweeper Grid

# Implementing "First Click Safe"

## How can we implement a "first click is always safe" feature in our bomb placement logic?

Implementing a "first click is always safe" feature is a common practice in Minesweeper games. It ensures that the player's first move is never a game-ending one, which can beÂ frustrating.

Let's explore how we can modify our bomb placement logic to accommodate thisÂ feature.

## The Basic Approach

The key idea is to delay bomb placement until after the first click. Here's how we can implementÂ this:

1. Don't place bombs during grid initialization.
2. When the player clicks a cell for the first time, place bombs in all cells except the clicked one and its neighbors.
3. Then proceed with revealing the clicked cell and its neighbors as usual.

Let's modify our MinesweeperGrid class to implement thisÂ approach:

#include <algorithm>
#include <iostream>
#include <random>
#include <vector>

class MinesweeperCell {
public:
bool hasBomb{false};
bool isRevealed{false};
int row, col;

MinesweeperCell(int r, int c) :
row(r), col(c) {}
};

class MinesweeperGrid {
private:
std::vector<std::vector<MinesweeperCell>>
grid;
int rows, cols, bombCount;
bool firstClick{true};

public:
MinesweeperGrid(int r, int c, int bombs) :
rows(r), cols(c), bombCount(bombs) {
grid.resize(rows,
std::vector<MinesweeperCell>(
cols, MinesweeperCell(0, 0)));
for (int i = 0; i < rows; ++i) {
for (int j = 0; j < cols; ++j) {
grid[i][j] = MinesweeperCell(i, j);
}
}
}

void RevealCell(int row, int col) {
if (firstClick) {
PlaceBombs(row, col);
firstClick = false;
}

MinesweeperCell &cell = grid[row][col];
cell.isRevealed = true;

if (cell.hasBomb) {
std::cout << "Game Over!\n";
} else {
std::cout << "Cell revealed safely.\n";
}
}

private:
void PlaceBombs(int safeRow, int safeCol) {
std::vector<MinesweeperCell *>
availableCells;
for (int i = 0; i < rows; ++i) {
for (int j = 0; j < cols; ++j) {
if (std::abs(i - safeRow) > 1 ||
std::abs(j - safeCol) > 1) {
availableCells.push_back(&grid[i][j]);
}
}
}

std::random_device rd;
std::mt19937 g(rd());
std::shuffle(availableCells.begin(),
availableCells.end(), g);

for (int i = 0; i < bombCount &&
i < availableCells.size();
++i) {
availableCells[i]->hasBomb = true;
}
}
};

int main() {
MinesweeperGrid grid(
10, 10, 10); // 10x10 grid with 10 bombs
grid.RevealCell(5, 5); // First click
grid.RevealCell(0, 0); // Second click
return 0;
}
Cell revealed safely.
Cell revealed safely.

## Key Points of the Implementation

1. Delayed Bomb Placement: We don't place bombs during grid initialization. Instead, we wait for the first RevealCell() call.
2. Safe Area: In PlaceBombs(), we exclude the clicked cell and its immediate neighbors from possible bomb locations.
3. Random Placement: We shuffle the list of available cells and place bombs in the first bombCount cells, ensuring random distribution.
4. Flexibility: This approach allows us to easily adjust the size of the safe area around the first click if needed.

## Potential Improvements

1. Optimization: For large grids, we could optimize by only shuffling the first bombCount elements of availableCells.
2. Neighbor Revealing: In a full implementation, we'd also want to reveal neighboring cells if the clicked cell has no adjacent bombs.
3. Bomb Count Validation: We should add a check to ensure bombCount is less than the number of available cells after excluding the safe area.

This "first click is always safe" feature significantly improves the player experience in our Minesweeper game, reducing frustration and encouraging more strategic gameplay from the very firstÂ move.

This Question is from the Lesson:

### Adding Bombs to the Minesweeper Grid

Updating the game to to place bombs randomly in the grid and render them when cells are cleared.

Answers to questions are automatically generated and may not have been reviewed.

This Question is from the Lesson:

### Adding Bombs to the Minesweeper Grid

Updating the game to to place bombs randomly in the grid and render them when cells are cleared.

Part of the course:

## Building Minesweeper with C++ and SDL2

Apply what we learned to build an interactive, portfolio-ready capstone project using C++ and the SDL2 library

Free, unlimited access

### This course includes:

• 37 Lessons
• 100+ Code Samples
• 92% Positive Reviews
• Regularly Updated
• Help and FAQ
Free, Unlimited Access

### Professional C++

Comprehensive course covering advanced concepts, and how to use them on large-scale projects.