Ответ:

#include <iostream>

#include <vector>

using namespace std;

double geometric_mean(std::vector<float> const& data)  

{

auto product = 1.0;

for (auto x : data) product *= x;

return std::pow(product, 1.0 / data.size());

}

int main()

{

const unsigned int M = 3;

const unsigned int N = 5;

std::vector<float> g;

float TV[6][7]= {

{ 7.2, 3.6, 4.8, 6.3, 0, 3.2, 0 },

{ 4.5, 2.3, -5.1, 1.3, 8.1, 0, 2.4 },

{ 6.3, -2.4, 8.4, 0, 1.6, 1.5, 0 },

{ 1.7, 6.8, 1.3, 9.5, 0, 0, 1.8 },

{ 2.3, 2.6, 8.5, 0.8, 2.6, 0, 0 },

{ 9.5, 1.6, -3.8, 2.6, -1.3, 3.3, -0.8 }

};

for (int i = 0; i < N; i++)

{

 float max = TV[0][i];

 for (int j = 0; j < M; j++)

 {

  if (TV[j][i] >= max) max = TV[j][i];

 }

 cout << "max M[" << i+1 << "]=" << max<<endl;

 g.push_back(max);

}

cout << "GM=" << geometric_mean(g)<<endl;

system("pause");

}

Объяснение: