comparator in sort c++
In C++, you can use a comparator function in the sort function to define custom sorting criteria. Here's an example of how to use a comparator in the sort function:
#include <iostream>
#include <algorithm>
#include <vector>
bool customComparator(int a, int b) {
return a < b; // Change the comparison logic as needed
}
int main() {
std::vector<int> vec = {3, 1, 4, 1, 5, 9};
std::sort(vec.begin(), vec.end(), customComparator);
for (int num : vec) {
std::cout << num << " ";
}
return 0;
}
In this example, the customComparator
function is used to define the sorting order. The sort
function then takes the comparator function as the third argument to customize the sorting behavior.