Trying to find the smallest value and its index along a std vector in cpp

Question

I am trying to find the smallest value and its index in a vector. But my programm seem to give weird results? You can check it out here: http://cpp.sh/5qj7r

// Example program
#include <iostream>
#include <string>
#include <vector>
#include <algorithm>

int main()
{
  std::vector<float> const test{5.5,4.,3.,0.2,7.,5.};
  for (int i=0;i<6;++i)
  {
  std::cout << "test[i="<< i <<"]: " << test[i] << "\n";
  }

  size_t index{0};    
  for (size_t i{0}; i < 6U; ++i)
  {
  
  std::cout << "test[i="<<i<<"]: " << test[i]<<"\n";
  std::cout << "old min: "<< test[index] <<"\n";
  std::cout << "old index: "<< index <<"\n";
  std::cout << "test[i] is smaller old min: ";
  std::cout << std::boolalpha;   
  std::cout << (test[i] < test[index]) << "\n";
  index = i ? (test[i] < test[index]) : index;
    
  std::cout << "new min: "<< test[index] <<"\n";
  std::cout << "new index: "<< index <<"\n";
        
  }  
  std::cout << "Index of Smallest Value: " << index<<"\n";
 
  
}

The output is the following (at the very end) "Index of Smallest Value: 1"

I expect to get the value 0.2 and its corresponding index 3.

Answer 1

maybe try it with this for loop

static float min = std::numeric_limits<float>::max();
for (float number : your_vector) {

   if (number < min)
      min = number;
}

std::cout << min;