Обработка данных: вывести данные о технике получающем наименьшую зарплату

#include<iostream>
#include<stdio.h>
using namespace std;
int main ( )
{
const int n=3;
FILE *G;
struct rabotnik 
 { int nomer;
char tip[20];
char FIO[40];
char posada[20];
 float oklad;
 int data;
 }s1;
 int i;
 if ((G=fopen("danie_Rob", "wb"))==NULL)
 { cout<<" ERROR OPEN 1 FAIL";
exit(1);
 }
for (i=0;i<n;i++)
 { cout<<"Nomer: "; cin>> s1.nomer;
cout<<"FIO: "; cin>>s1.FIO;
cout<<"Posada: "; cin>>s1. posada;
cout<<"Oklad: "; cin>> s1. oklad;
cout<<"Data: "; cin>>s1. data;
fwrite(&s1,sizeof(struct rabotnik),1,G);
 }
fclose(G);
cout<<" ";
char posad[20];
float max=0;
cout<<" Vvesty posadu dlya poshuku: ";   // "Введите должность для поиска: "
cin>>posad;
if ((G=fopen("danie_Rob", "r"))==NULL)
 {cout<<" ERROR OPEN 2 FAIL ";
 exit(1);
 }
cout<<" \n Result"<<endl;
for (i=0;i<n;i++)
{ fread (&s1,sizeof(struct rabotnik),1,G);
 if (s1.posada==posad)
if (s1.oklad> max ) { max= s1.oklad; max=i; }
}
fclose(G);
for (i=0; i<=max;i++)
fread (&s1,sizeof(struct rabotnik),1,G);
cout<<" Nomer: "<< s1.nomer<<endl;
cout<<" FIO: "<< s1.FIO<<endl;
cout<<" Oklad: "<< s1.oklad<<endl;
cout<<" posada: "<< s1.posada<<endl;
cout<<" Data: "<< s1.data <<endl;
fclose(G);
return 0;
}