Нахождение последнего отрицательного элемента массива

#include <conio.h>
#include <stdio.h>
#include <fstream.h> // dlia 4tenia/zapisi failov
 
void main()
{
const short int n=40; // kol-vo elementov massiva
int mas[n];  // massiv celyx 4isel
int min;  // peremannaya dlia vyvoda min. zna4enia
int i, chislo; // // chislo-peremennaya dlia obmena iformaciey iz faila (v fail)
 
clrscr(); 
 
ifstream file_in("IN2_17.txt");  // ---- otkritie faila "IN2_17.txt"  na s4ityvanie
for (i=0;i<=n-1;i++){ file_in >> chislo;//zapis v massiv zna4eniy, soderzhasixsia v faile
                      mas[i]=chislo;
};
 
file_in.close();
printf("Soderzimoe faila \"IN2_17.txt\":\n"); 
for (i=0;i<=n-1;i++) printf("%d ", mas[i]);
 
for (i=0;i<=n-1;i++) if (mas[i]>0) min=mas[i]; // poisk maximal'nogo zna4enia i
                        //prisvaivanie ego peremennoy "min"
 
printf("\n\n Minimalnoe'noe 4islo: "); // vivod mainimyma na displey
printf("%d ", min);
 
ofstream file_out("OUT2_17.txt"); //---- otkritie faila "OUT2_17.txt"  na zapis'
//-------soderzhimoe faila "OUT2_17.txt"--------
file_out <<"Soderzimoe faila \"IN2_17.txt\":";
for (i=0;i<=n-1;i++) 
file_out << mas[i] << " ";
 
file_out " Minimal'noe 4islo: ";
file_out <<min;
// ---------------------------------------------
file_out.close();
getch();
}

 file_out <<" Minimal'noe 4islo: ";

#include <stdio.h>
#include <fstream> // dlia 4tenia/zapisi failov
 
int main()
{
const short int n=40; // kol-vo elementov massiva
int mas[n];  // massiv celyx 4isel
int min;  // peremannaya dlia vyvoda min. zna4enia
int i, chislo; // // chislo-peremennaya dlia obmena iformaciey iz faila (v fail)
 
std::ifstream file_in("IN2_17.txt");  // ---- otkritie faila "IN2_17.txt"  na s4ityvanie
for (i=0;i<=n-1;i++){ file_in >> chislo;//zapis v massiv zna4eniy, soderzhasixsia v faile
                                          mas[i]=chislo;
};
 
file_in.close();
printf("Soderzimoe faila \"IN2_17.txt\":\n"); 
for (i=0;i<=n-1;i++) printf("%d ", mas[i]);
 
for (i=0;i<=n-1;i++) if (mas[i]>0) min=mas[i]; // poisk maximal'nogo zna4enia i
                                                //prisvaivanie ego peremennoy "min"
 
printf("\n\n Minimalnoe'noe 4islo: "); // vivod mainimyma na displey
printf("%d ", min);
 
std::ofstream file_out("OUT2_17.txt"); //---- otkritie faila "OUT2_17.txt"  na zapis'
//-------soderzhimoe faila "OUT2_17.txt"--------
file_out <<"Soderzimoe faila \"IN2_17.txt\":";
for (i=0;i<=n-1;i++) 
file_out << mas[i] << " ";
 
file_out <<" Minimal'noe 4islo: ";
file_out <<min;
// ---------------------------------------------
file_out.close();
system("pause");
return 0;
}

#include <iostream>
#include <fstream>
#include <vector>
#include <algorithm>
#include <iterator>
#include <functional>
#include <string>
 
int main(){
    std::vector<int> vec;
    int tmp;
    const char *fin_name = "input.txt", *fout_name = "output.txt";
 
    std::ifstream fin(fin_name);
    if ( !fin.is_open() ){
        std::cerr << "Can't open file <" << fin_name << "> for input!" << std::endl;
        return 1;
    }
    while ( fin >> tmp )
        vec.push_back(tmp);
    if ( fin.bad() ){
        std::cerr << "Can't read from file <" << fin_name << ">!" << std::endl;
        return 1;
    }
    fin.close();
 
    if ( vec.empty() ){
        std::cerr << "Error! Array is empty!" << std::endl;
        return 1;
    }
 
    std::ofstream fout(fout_name);
    if ( !fout.is_open() ){
        std::cerr << "Can't open file <" << fout_name << "> for output!" << std::endl;
        return 1;
    }
    fout << "Array:" << std::endl;
    std::copy(vec.begin(), vec.end(), std::ostream_iterator<int>(fout, "\n"));
    fout << std::endl;
 
    std::binder2nd < std::less<int> > IsNegative (std::less<int>(),0);
    std::binder2nd < std::greater_equal<int> > IsPositive (std::greater_equal<int>(),0);
    std::vector<int>::iterator i, j;
    i = std::find_if(vec.begin(), vec.end(), IsNegative);
    if ( i != vec.end() ){
        j = std::find_if(i, vec.end(), IsPositive);
        fout << "Last negative element: " << *(--j) << std::endl;
    }
    else
        fout << "No negative elements in array." << std::endl;
    fout << std::endl;
 
    i = std::min_element(vec.begin(), vec.end());
    fout << "Minimum value of array elements: " << *i << std::endl;
 
    fout.close();
 
    fin.open(fout_name);
    if ( !fin.is_open() ){
        std::cerr << "Can't read just written file!" << std::endl;
        return 1;
    }
    std::string buf;
    while ( std::getline(fin, buf) )
        std::cout << buf << std::endl;
    fin.close();
 
    return 0;
}