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C++

Assume that a function named swapdoubles has been defined and is available for use in this exercise: that function receives two variables of type double and exchanges their values. Write the definition of a function named sort3 that is passed three double variables . The function returns nothing but modifies the values of these variables so they are in sorted order. So, if a, b and c have (respectively) the values 3.14, 2.71, and 3.04, and the invocation sort3(a,b,c) is made, then upon return, the values of a, b and c will be 2.71, 3.04, and 3.14 respectively.