procedure_loop_1_no.cpp

#include <iostream>
#include <vector>
using namespace std;



void  blourg(vector<int> t, int v, int &i, bool &b) {
    i=-1;b=false;
    for( int j=0; j<t.size();j++)
            if(t[j]  == v)
                {i=j; b=true;}
}


int main() {bool  toto;
    vector<int> tab = {4, 10, 13, 7, 5, 6};
    int s = 0;
    blourg(tab,5,s,toto);
    if(toto) cout << s << endl;
    else  cout << "blourg" << endl;
}