how to use std::find to search an element in the PoseStamped x and y.

edit

I am working with ros kinetic to check if my poseStamped messages has an element which passed on from a function

double gothrough(int in, int j ){ 
    std::vector<geometry_msgs::PoseStamped>  gothro;
    std::vector<geometry_msgs::PoseStamped> new_x;
    std::vector<geometry_msgs::PoseStamped> new_y;  

    new_x.push_back(gothrough_x); // where gothrough_x is the posestamped messages from the callback subscriber
    new_y.push_back(gothrough_y); // where gothrough_y is the posestamped messages from the callback subscriber
    int i =0;
    for(std::vector<int>::iterator it =new_x.begin(); it !=new_x.end(); it++){

       gothro.push_back(*it);
     }
           for(int i =0; i <  gothro.size(); i++ )
            {
            std::find(std::begin(gothro), std::end(gothro), in);   // **I am trying to find if the element In is present in the gothrough_x but i am getting error at this line std:find, it would be grateful if someone help me out on this**

             } 
    }