Here's the code. //Ch5 Exercise 4, page 287 //Calculates and displays the average of three test scores //created/revised by Jes Smith on July 5 2010 #include <iostream> using namespace std; //begin program int main() { //declare variables double score_1=0; double score_2=0; double score_3 (0); int answer; cout<< "This program takes three test score numbers you enter, and figures out the average for you. "; cout<< "Please enter your first test score, then press enter. Decimal values accepted: " ; cin >> score_1 ; cout<< "Please enter your second test score. Remember to press enter when done: "; cin >>score_2 ; cout<< "Finally, enter your third test score."; cin >>score_3 ; answer = score_1+score_2+score_3/3; cout<<"The average is " <<answer; return (0); } //end of main function.