# Homework Help

• ### Question

• Hello I am trying to write a code that would allow the program to give me a letter grade for an average of exam scores from A-F but I keep getting these 2 errors. Can someone help me figure this out?

// This program calculates an average
#include <iostream>
#include <cmath>
using namespace std;

int main ()
{
double test1, test2, test3, test4; //To hold the grades
double average; //To hold the average

//Get the four exam scores.
cin >> test1;
cin >> test2;
cin >> test3;
cin >> test4;

//Calculate the average of the exam grades.
average = (test1 + test2 + test3 + test4) / 4.0;

//Display the average.
cout << "The average grade is: "<< average << endl;

//This program uses an if/else if statement to assign a
//letter grade (A, B, C, D, or F) to the average test score.

const int A_SCORE = 90,
B_SCORE = 80,
C_SCORE = 70,
D_SCORE = 60,
F_SCORE = 50;

int average;  //To hold a numeric test score

//Get the average test score.
cout << "Enter the average test score and I will\n"
<< "tell you the letter grade: ";
cin >> average;

if (average >= A_SCORE)
cout << "The grade is A.\n";
else if (average >= B_SCORE)
cout << "The grade is B.\n";
else if (average >= C_SCORE)
cout << "The grade is C.\n";
else if (average >= D_SCORE)
cout << "The grade is D.\n";
else

return 0;
}

The errors are:

Error    1    error C2371: 'average' : redefinition; different basic types

Error    2    error C2088: '>>' : illegal for class

Sunday, September 22, 2013 9:42 PM

• Search for "average" in your code and you'll see that you've defined it twice, first as a double, later as int.
Sunday, September 22, 2013 10:10 PM

### All replies

• Search for "average" in your code and you'll see that you've defined it twice, first as a double, later as int.
Sunday, September 22, 2013 10:10 PM
• Waht part of error 1 is unclear.  You define a variable named average as a double at the top of your function and you attempt to define another variable with the same name as an int in the middle of the function.  You cannot redefine a variable or define it twice in the same scope.  Change the name of one of the variables in its definition and wherever it is referenced.

Next time you post a question, please include the complete text of the error message.  You use the >> operator in several locations.  Without the line number it can be difficult to tell which of those the compiler is complaining about.

Sunday, September 22, 2013 10:10 PM

//Get the average test score.
cout << "Enter the average test score and I will\n"
<< "tell you the letter grade: ";
cin >> average;

Sunday, September 22, 2013 10:48 PM

//Get the average test score.
cout << "Enter the average test score and I will\n"
<< "tell you the letter grade: ";
cin >> average;

The second error message is a result of the first error.
Fix the first error and the second should disappear.

- Wayne

Sunday, September 22, 2013 11:19 PM
• Thanks everyone for their help, I really appreciate it :)
Sunday, September 22, 2013 11:29 PM