//***EXERCISE:

//Modify your program from Exercise 1 so that it reads the information from the gradfile.txt file

// This program will read in a group of test scores (positive integers from 1 to 100) // from the keyboard and then calculate and output the average score // as well as the highest and lowest score. There will be a maximum of 100 scores. #include using namespace std; typedef int GradeType[100]; // declares a new data type: // an integer array of 100 elements float findAverage (const GradeType, int); // finds average of all grades

int findHighest (const GradeType, int); // finds highest of all grades

int findLowest (const GradeType, int); // finds lowest of all grades int main() { GradeType grades; // the array holding the grades.

int numberOfGrades; // the number of grades read. int pos; // index to the array. float avgOfGrades; // contains the average of the grades.

int highestGrade; // contains the highest grade. int lowestGrade; // contains the lowest grade. // Read in the values into the array

pos = 0; cout << "Please input a grade from 1 to 100, (or -99 to stop)" << endl;

cin >> grades[pos]; while (grades[pos] != -99) { // Fill in the code to read the grades } numberOfGrades = ; // Fill blank with appropriate identifier // call to the function to find average avgOfGrades = findAverage(grades, numberOfGrades); cout << endl << "The average of all the grades is " << avgOfGrades << endl; // Fill in the call to the function that calculates highest grade cout << endl << "The highest grade is " << highestGrade << endl; // Fill in the call to the function that calculates lowest grade // Fill in code to write the lowest to the screen return 0; } //******************************************************************************** // findAverage // // task: This function receives an array of integers and its size. // It finds and returns the average of the numbers in the array // data in: array of floating point numbers // data returned: average of the numbers in the array // //******************************************************************************** float findAverage (const GradeType array, int size) { float sum = 0; // holds the sum of all the numbers for (int pos = 0; pos < size; pos++) sum = sum + array[pos]; return (sum / size); //returns the average }

//**************************************************************************** // findHighest // // task: This function receives an array of integers and its size. // It finds and returns the highest value of the numbers in the array // data in: array of floating point numbers // data returned: highest value of the numbers in the array // //**************************************************************************** int findHighest (const GradeType array, int size) { / Fill in the code for this function } //**************************************************************************** // findLowest // // task: This function receives an array of integers and its size. // It finds and returns the lowest value of the numbers in the array // data in: array of floating point numbers // data returned: lowest value of the numbers in the array // //**************************************************************************** int findLowest (const GradeType array, int size) { // Fill in the code for this function }