Not Operator vs Equals False

1#include <iostream>
2using namespace std;
3
4int main() {
5  bool isAlive{false};
6
7  // Method 1: Using the ! operator
8  if (!isAlive) {
9    cout << "Not alive (using !)\n";
10  }
11
12  // Method 2: Comparing with == false 
13  if (isAlive == false) {
14    cout << "Not alive (using == false)";
15  }
16}

1#include <iostream>
2using namespace std;
3
4int main() {
5  bool isAlive{true};
6  bool hasWeapon{false};
7  bool isInCombat{true};
8
9  // Using == false makes the code longer and
10  // harder to read
11  bool cannotFight{
12    isAlive == false || hasWeapon == false
13    || isInCombat == false};
14
15  // Using ! is cleaner and more readable
16  bool cannotFightBetter{
17    !isAlive || !hasWeapon || !isInCombat}; 
18
19  cout << "Cannot fight: " << cannotFightBetter;
20}

1#include <iostream>
2using namespace std;
3
4int main() {
5  bool isAlive{false};
6
7  // This is a common mistake - we're not
8  // testing isAlive, we're updating it!
9  if (isAlive = false) {
10    cout << "This will not print because"
11      " = assigns false to isAlive\n";
12  }
13
14  // Using ! avoids this potential error
15  if (!isAlive) {
16    cout << "This is clearer and safer";
17  }
18}