Verified answer

#include <iostream>

#include <fstream>

#include <cmath>

using namespace std;

int main()

{

int a[5][5] = { 0 }, i, j, s, b[5] = { 0 };

double p;

ifstream f("input.txt");

if (!f.is_open())

 cout << "error";

else

{

 for (i = 0; i < 5; i++)

  for (j = 0; j < 5; j++)

   f >> a[i][j];

}

f.close();

s = 0;

for (i = 0; i < 5; i++)

 if(a[i][i]<0)

  s += a[i][i];

cout << "sum=" <<s<<endl;

p = 1;

for (int j = 0; j < 5; j++)

 p *= 2*sin(abs(a[3][j]))+0.3*j;

cout << "P=" << p << endl;

s = 0;

for (j = 0; j < 5; j++)

{

 for (i = 0; i < 5; i++)

  if(a[i][j]>0)

   s += a[i][j];

 b[j] = s;

 s = 0;

}

cout << "massiv b: ";

for (i = 0; i < 5; i++)

 cout << b[i] << " ";

return 0;

}