how to sort a vector in c++

struct data{
    string word;
    int number;
};


bool my_cmp(const data& a, const data& b)
{
    // smallest comes first
    return a.number < b.number;
}

std::sort(A.begin(), A.end(), my_cmp);

// C++ program to sort a vector in non-decreasing 
// order. 
#include <bits/stdc++.h> // Vector 
#include <algorithm>  // Sort
using namespace std; 
  
int main() 
{ 
// Initalizing the vector v with these values
    vector<int> v{ 1, 5, 8, 9, 6, 7, 3, 4, 2, 0 }; 
// Vector is sorted in ascending order   
    sort(v.begin(), v.end()); 
  
    return 0; 
} 

sort(v.begin(), v.end());

// C++ program to sort a vector in non-decreasing 
// order. 
#include <algorithm> //Sort
#include <bits/stdc++.h> 
using namespace std; 
  
int main() 
{ 
    vector<int> v{ 1, 5, 8, 9, 6, 7, 3, 4, 2, 0 }; 
  
    sort(v.begin(), v.end()); 
  
    return 0; 
} 

sort(v.begin(), v.end(), greater<int>()); 

sort(a.begin(), a.end());