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#include <iostream>
#include <vector>
using namespace std;
template<typename T>
T average(const std::vector<T> &vec)
{
if(vec.empty())
{
throw std::runtime_error("Vector passed is empty");//throw if the vector is empty because we don't want to operate on an empty vector
}
T sum{};
for(T elem: vec)
{
sum += elem;
}
return sum/vec.size();
}
int main()
{
std::vector<float> myvec1{1,2,3.4};
std::cout<<"average is: "<<average(myvec1);
std::vector<int> myvec2;
average(myvec2);//this will print "vector passed is empty"
return 0;
}
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