Random number generator in vectors

[Deadweight77]

It been awhile since I've used c++ as I have been using python more frequently however, I need a refresher on how to create a random number generator in vectors. The code currently keeps going as if it is a while loop due to the for loop. What I want is to create an empty vector with 5 slots and fill them in with 5 random numbers since I resized the vector to 5.

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

int main()
{
  vector<int>vect;
  vect.resize(5);
  
  for (int i=0;i<vect.size();i++)
  {
      vect.push_back(rand()%10+1);
      cout<<vect[i]<<endl;
  }
}

[lastchance]

And the end just always seemed the same distance away ...

  vect.resize(5);
...
  vect.push_back(...)

and

for (int i=0;i<vect.size();i++)
...
  vect.push_back(...)

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

int main()
{
   const int N = 5;
   srand( time( 0 ) );
   vector<int> vect(N);
   for (int i=0; i < N; i++ )
   {
      vect[i] = rand()%10+1;
      cout << vect[i] << '\n';
   }
}

[ne555]

> The code currently keeps going as if it is a while loop due to the for loop
I have no idea what you're trying to say

.resize() changes the size of the vector (in this case to 5)
.push_back() inserts an element to the end, so the size increases by 1
you may use brackets to access an element, `vect[3]' will access the fourth element of the vector

[lastchance]

#include <iostream>
#include <vector>
#include <cstdlib>
#include <ctime>
#include <algorithm>
using namespace std;

int main()
{
   srand( time(0) );
   vector<int> V(5);
   generate( V.begin(), V.end(), [](){ return rand()%10 + 1; } );
   for ( auto e : V ) cout << e << '\n';
}

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

int main()
{
   srand( time(0) );
   vector<int> V(5);
   for (auto &e : V ) cout << ( e = rand()%10 + 1 ) << '\n';
}

#include <iostream>
#include <valarray>
#include <cstdlib>
#include <ctime>
using namespace std;

int main()
{
   srand( time(0) );
   valarray<int> V(5);
   V = V.apply( []( int ){ return rand()%10 + 1; } );
   for (auto &e : V ) cout << e << '\n';
}

[keskiverto]

And then with modern C++ random engine:

#include <iostream>
#include <vector>
#include <chrono>
#include <random>

int main()
{
  // http://www.cplusplus.com/reference/random/mersenne_twister_engine/mersenne_twister_engine/
  unsigned seed = std::chrono::system_clock::now().time_since_epoch().count();
  std::mt19937 generator( seed );  // mt19937 is a standard mersenne_twister_engine
  // http://www.cplusplus.com/reference/random/uniform_int_distribution/
  std::uniform_int_distribution<int> distribution(1, 10);

  int N = 5; // size of vector does not need to be a compile-time constant
  std::vector<int> V(N);

  // ranged for syntax and automatically deduced type 'auto'
  for ( auto& e : V ) e = distribution(generator);

  for ( auto e : V ) std::cout << e << '\n';
}