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In this approach, we use a closure to maintain the state across multiple calls to the counter function. The closure lets us keep track of the last counted value between function calls.
Time Complexity: O(1) per call.
Space Complexity: O(1) for maintaining the state.
1#include
In C, closures are not directly supported, so function pointers and global/static variables are used to emulate the behavior. We use a static variable to hold the current count which persists across function calls.
This approach uses object-oriented programming to keep track of the counter's state across multiple invocations by encapsulating the state within a class instance.
Time Complexity: O(1) per call.
Space Complexity: O(1) for the instance state.
1public class Counter {
2 private int count;
3
4 public Counter(int n) {
5 count = n;
6 }
7
8 public int Call() {
9 return count++;
10 }
11}The state of the counter in C# is stored within an instance variable inside a class. The call method is used to both increment and retrieve the current count value.