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CIS071 Lab14 - Grade Conversion with Structs Due: (Fri Dec 8, 2006)

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Objectives: Arrays; Arrays of Structs; Lookup (Search) Tables

Lab14: Modify your completed assignment for Lab05 by changing the implementation of the function

char convertGrade (int numScore);

You need to remove the old code you wrote and replace it with code that uses a lookup (search) table to convert a numeric score to a letter grade. The interface for your function and the rest of your program should all remain the same. The specification for the function remains the same, including the return value of ‘Z’ if the score is out of range.

Instructions:

You need to first declare a struct range entry containing three elements:

typedef struct { // declares a new data type

int minScore; // minimum score for a grade range

int maxScore; // maximum score for a grade range

char grade; // grade for the current grade range

} table_type;

then define the array of these structs as

#define TABLE_SIZE 5

table_type table[TABLE_SIZE];22

and then populate the table such that the resulting table looks like this :

minScore maxScore grade

90	100	A
80	89	B
70	79	C
60	69	D
0	59	F

[0]

[1]

[2]

[3]

[4]

Accessing any element in the array can be done by writing

table[i] where 0 <= i < 5

Accessing a particular component of the struct at element in the array is accomplished by writing (for example) table[i].grade. If i is 3, the value of table[i].grade is ‘D’.

Hint: You can check if the letter grade is ‘A’ by writing:

if (numScore <= table[1].maxScore && numScore > table[1].minScore)

 
Deliverables:
Submit your program; show a few sample runs of the program.