C ++ namespaces and custom header files

The following is a simple example to demonstrate how to use the namespace and custom header files. The Code is as follows:

Compare. h:

namespace compare{double max(const double* data,int size);double min(const double* data,int size);}

Compare. cpp:

#include "compare.h"double compare ::max(const double* data,int size){double result=data[0];for(int i=1;i
 
  data[i])result=data[i];return result;}
 

Test. cpp:

# Include
 
  
# Include "compare. h "using compare: max; using compare: min; // you can use the following command to replace the preceding statement. // using namespace compare; using std: cout; using std:: endl; int main () {double data [] = {1.2, 3.3, 5.4, 2.6, 4.7}; const int dataSize = sizeof data/sizeof data [0]; cout <"Min double is" <