In C++, the logical operators and (equivalent to &&) and or (equivalent to ||) allow you to create complex logical expressions using simpler boolean expressions.
Here is how to use or in C++:
bool a = true;
bool b = false;
bool c = true;
// Example 1:
if (a or b) {
cout << "At least one of a or b is true." << endl;
}
// Example 2:
if (b or c) {
cout << "At least one of b or c is true." << endl;
}
// Example 3:
if (a or b or c) {
cout << "At least one of a, b or c is true." << endl;
}
In example 1, the condition evaluates to true because a is true, even though b is false. In example 2, the condition evaluates to true because c is true, even though b is false. In example 3, the condition evaluates to true because at least one of a, b, or c is true.
Similarly, here is how to use and in C++:
bool x = true;
bool y = false;
bool z = true;
// Example 1:
if (x and y) {
cout << "Both x and y are true." << endl;
}
// Example 2:
if (y and z) {
cout << "Both y and z are true." << endl;
}
// Example 3:
if (x and y and z) {
cout << "All of x, y and z are true." << endl;
}
In example 1, the condition evaluates to false because y is false, even though x is true. In example 2, the condition evaluates to false because y is false, even though z is true. In example 3, the condition evaluates to false because y is false, even though x and z are true.