maximum.h

// Fig. 5.13: maximum.h
// Function template maximum header.
template <typename T>  // or template<class T>      
T maximum(T value1, T value2, T value3) {
   T maximumValue{value1}; // assume value1 is maximum    

   // determine whether value2 is greater than maximumValue
   if (value2 > maximumValue) {
      maximumValue = value2;
   }

   // determine whether value3 is greater than maximumValue
   if (value3 > maximumValue) {
      maximumValue = value3;
   }

   return maximumValue;
}

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