Using C++

Goal

Consider the following code. It implements a fairly basic 3-dimension vector class.

#include  using namespace std; class vec3 { protected: double data[3]; public: vec3() {} vec3(double x, double y, double z) { data[0] = x; data[1] = y; data[2] = z; } vec3(const vec3& v) { for (int i=0; i<3; ++i) { data[i] = v[i]; } } const vec3& operator=(const vec3& v) { for (int i=0; i<3; ++i) { data[i] = v[i]; } return *this; } double& operator[](int i) { return data[i]; } const double& operator[](int i) const { return data[i]; } void print(); friend double find_max(const vec3& v); }; void vec3::print() { cout << "(" << data[0] << "," << data[1] << "," << data[2] << ")" << endl; } double find_max(const vec3& v) { double m = v[0]; if (m < v[1]) m = v[1]; if (m < v[2]) m = v[2]; return m; } int main() { vec3 v(1,2,3); v.print(); cout << find_max(v) << endl; return 0; } 

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Currently the vector class stores double values. You need to templatize it, such that we can use this class to store values of other types as seen below

 vec3 v<int>(1,2,3); v.print(); cout << find_max(v) << endl; vec3<char> v2('z','y','x'); v2.print(); cout << find_max(v2) << endl;