Calculate high and low value of array

 struct WeatherStation  {

string Name;
double Temperature;

 };

 void Initia开发者_Go百科lize(WeatherStation[]);
 void HL(WeatherStation List[]);

int main()

 {
 string Command;
  WeatherStation Stations[5];

  //some commands

 }
 void Initialize(WeatherStation StationList[])

 {

  StationList[0].Name = "A";
  StationList[0].Temperature = 0.0;

  StationList[1].Name = "B";
  StationList[1].Temperature = 0.0;

  StationList[2].Name = "C";
  StationList[2].Temperature = 0.0;

  StationList[3].Name = "D";
  StationList[3].Temperature = 0.0;

  StationList[4].Name = "E";
  StationList[4].Temperature = 0.0;

  }

 void HL(WeatherStation List[])
  {
   int K;
   int Low = List[0];            
   int High = List[0];       

   for(K = 0 ; K < 5 ; K++)      
    if(List[K] < Low)
    Low = List[K];

   for(K=0 ;  K < 5 ; K++)    
    if(List[K] > High)
    High = List[K];

   cout << "Lowest Temperature:  " <<Low << endl;
   cout << "Highest Temperature: "<< High << endl;
   } 

The last part is tripping me up.

chief.cpp: In function ‘void HL(WeatherStation*)’:

chief.cpp:124: error: cannot convert ‘WeatherStation’ to ‘int’ in initialization

chief.cpp:125: error: cannot convert ‘WeatherStation’ to ‘int’ in initialization

chief.cpp:128: error: no match for ‘operator<’ in ‘*(List + ((unsigned int)(((unsigned int)K) * 12u))) < Low’

chief.cpp:129: error: cannot convert ‘WeatherStation’ to ‘int’ in assignment

chief.cpp:132: error: no match for ‘operator>’ in ‘*(List + ((unsigned int)(((unsigned int)K) * 12u))) > High’

chief.cpp:133: error: cannot convert ‘WeatherStation’ to ‘int’ in assignment

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It cannot convert WeatherStation to int because WeatherStation is a structure. If you want to get a member of a structure you should write, for instance, List[0].Temperature.

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You should use C++ containers instead of arrays

If you don't like std::vector, you can use std::array

void Initialize(std::vector<WeatherStation>&);
 void HL(const std::vector<WeatherStation>&);

int main()

 {
 string Command;
  std::vector<WeatherStation> Stations;

  //some commands

 }
 void Initialize(std::vector<WeatherStation>& StationsList)

 {

  StationList.push_back({"A", 0.0});
  StationList.push_back({"B", 0.0});
  StationList.push_back({"C", 0.0});
  StationList.push_back({"D", 0.0});
  StationList.push_back({"E", 0.0});

  }

 void HL(const std::vector<WeatherStation>& List)
  {
   cout << "Lowest Temperature:  " << std::min_element(List.begin(), List.end())->Temperature << endl;
   cout << "Highest Temperature: "<< std::max_element(List.begin(), List.end())->Temperature << endl;
   } 

Also note that it's not a very good idea to name your variables the same way as you name your types (I mean capitalized)

---

The problem you're having (or at least the main problem) is right here:

if(List[K] < Low)
    Low = List[K];

if(List[K] > High)
    High = List[K];

List is defined as an array of WeatherStation structures. You want something like:

if (list[K].Temperature < Low) 
    Low = List[K].Temperature;

Edit: You might also want to look into using std::min_element and std::max_element instead.