string find_last_of() in C++

find_last_of(): Find the last position of a character of a C string. It returns the 

index of the last occurrence. 

Starting from __pos searches backward for one of the characters 

of __s within this string. If found, returns the index where it was found. 

If not found, returns npos.

Parameters: 

__s – C string containing characters to locate.

 __pos – Index of character to look back from (default end). 

Syntax:

str.find_last_of(__s , __pos)

For Example:

str = "abcdefffb"

str.find_last_of("a") = > It returns 0.

Approach

C++

#include <bits/stdc++.h>
using namespace std;

int main()
{
    string str = "abcdefffb";

    cout << str.find_last_of("a") << "\n";
    

    return 0;
}