$/*$ Exercises:

$1.$ Modify and fix the program..

$2.$ Run the program with the following data:

$90457362-99$

Record the output here:

$3.$ Modify the program so it reads from the file gradfile.txt

instead of from the keyboard.

$4.$ Run the program with the gradfile.txt

hint: The input file needs to be in the same directory as your c$++$ project files.

Replace the cin with an ifstream variable.

Record the output here:

$*/$

$//$ This program will read in a group of trst 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$[\_\_\_\_]!=-99)$

$\{//$ TODO: Fill in the blanks with the correct index

pos$++$;

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

cin $>>$ grades$[\_\_\_\_]$; $//$ TODO: Fill in the blanks with the correct index

$\}$

numberOfGrades $=$ pos; $//$ TODO: Fix by assigning the correct value to numberOfGrades

avgOfGrades $=$ findAverage$($grades$,$ numberOfGrades$)$; $//$ call to the function to find average

cout $<<$ endl

$<<$ "The average of all the grades is $"<<$ avgOfGrades $<<$ endl;

$//$ TODO: assign highestGrade the return value of the findHigehstGrade function

cout $<<$ "The highest grade is $"<<$ highestGrade $<<$ endl;

$//$ TODO: assign lowestGrade the return value of the findLowestGrade function

$//$ TODO: print the lowest grade

$\}$

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 $+=$ array$[$pos$]$;

$\}$

return sum $/$ size;

$\}$

int findHighest$($const GradeType array, int size$)\{$

int highest $=$ array$[0]$; $//$ holds the highest number

for $($int pos $=0$; pos $<$ size; pos$++)\{$

$//$ TODO: if the current number is higher than highest, set highest to the current number

$\}$

return highest;

$\}$

int findLowest$($const GradeType array, int size$)\{$

int lowest $=$ array$[0]$; $//$ holds the lowest number

$//$ TODO: write the loop to find the lowest number

return lowest;

$\}$