Check out example codes for "sort a vector of strings according to their length c++". It will help you in understanding the concepts better.

Code Example 1

std::vector<std::string> v;
std::sort(v.begin(), v.end(), []
    (const std::string& first, const std::string& second){
        return first.size() < second.size();
    });

Code Example 2

#include <bits/stdc++.h> 
using namespace  std; 
  
// Function to check the small string 
bool compare(string &s1,string &s2) 
{ 
    return s1.size() < s2.size(); 
} 
  
// Driver function 
int main() 
{ 
    string arr[] = {"GeeksforGeeks", "I", "from", "am"}; 
    int n = sizeof(arr)/sizeof(arr[0]); 
      
    // Function to perform sorting 
    sort(arr, arr+n, compare); 
  
    return 0; 
}

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