passing function to another function in c 2b 2b

1#include <vector>
2#include <algorithm>
3#include <iostream>
4
5void transform(std::vector<int>::iterator beginIt,
6    std::vector<int>::iterator endIt,
7    std::vector<int>::iterator destinationBeginIt,
8    int func (int)) {
9  while (beginIt != endIt) {
10    *destinationBeginIt = func(*beginIt);
11    beginIt++;
12    destinationBeginIt++;
13  }
14}
15
16int main() {
17  std::vector<int> numbers{1, 2, 3}; // numbers has 3 values: 1, 2, 3
18  std::vector<int> bigNumbers(3); // bigNumbers has 3 values, default
19                                  // initialized: 0, 0, 0
20
21  transform(
22    numbers.begin(),
23    numbers.end(),
24    bigNumbers.begin(),
25    [](int small) {
26      return small * 10;
27    }
28  );
29
30  // Print the values of bigNumbers
31  for (const auto big : bigNumbers) {
32    std::cout << big << std::endl;
33  }
34}
35

11
22
33
4int func (int)
5int (*func) (int)
6int (&func) (int)
7