Question

Using basic c++ write 2 separate codes for this assignment.

Program #1 Write a program that calculates the average of a group of test scores, where the lowest score in the group is dropped. It should use the following functions.

• void getScore() should ask the user for a test score, store it in the reference parameter variable, and validate it. This function should be called by the main once for each of the five scores to be entered.

• void calcAverage() should calculate and display the average of the four highest scores. The functions should be called just once by main and should be passed the five scores.

• int findLowest() should find and return the lowest of the five scores passed to it. It should be called by calcAverage, which uses this function to determine which of the five scores to be dropped.

• Function prototypes void getScore(int &); void calcAverage(int, int, int, int, int); int findLowest(int, int, int, int, int);

Input Validation: Do not accept test scores lower than 0 or higher than 100

Program #2 Write a program to calculate the frequency of occurrence of each letter in a given text file. Your program should not distinguish between lower case and upper case letters. The text may contain characters other than alphabets. You can ignore the non-alphabetic characters. Write a function to convert all the uppercase letters to lowercase letters and use it. Your output should display for each letter the frequency of its occurrence in the file. A sample output is shown below.

Letter ‘a’ occurred 20 times

Letter ‘b’ occurred 25 times

.

.

.

Letter ‘z’ occurred 10 times The program should output the number of occurrences of a letter, only if the letter occurs at least once in the input file. In other words, if a letter did not occur in the input file, the program should not display that the occurred 0 times. Assume the name of the input file to be “fileread.txt”. I have attached the file to you along with the assignment. This will ensure all the students got same answers.

Prompt the user to enter the name of the input file and process the input file.

Hint: use an array and map each letter to an index of the array.

Answer 1

#include <iostream>
using namespace std;
void getScore(int&);
void calcAverage(int,int,int,int,int);
int findLowest(int,int,int,int,int);
int main()
{int n1,n2,n3,n4,n5;
getScore(n1);
getScore(n2);
getScore(n3);
getScore(n4);
getScore(n5);
calcAverage(n1,n2,n3,n4,n5);
return 0;
}
void getScore(int& num)
{do
{cout<<"enter a number: ";
cin>>num;
if(num<0||num>100)
cout<<"number out of range-try again\n";
}while(num<0||num>100);
return;
}
void calcAverage(int n1,int n2,int n3,int n4,int n5)
{double average;
int low,total;
low=findLowest(n1,n2,n3,n4,n5);
total=n1+n2+n3+n4+n5-low;
average=total/4.;
cout<<"The average of the top 4 grades is "<<average<<endl;
return;
}

int findLowest(int n1,int n2,int n3,int n4,int n5)
{int low;
low=n1;
if(n2<low)
low=n2;
if(n3<low)
low=n3;
if(n4<low)
low=n4;
if(n5<low)
low=n5;
return low;
}