Assignment #10: String and I/O
Given
a class Student as follows;
class Student {
char name[20];
unsigned
int age;
char dept[20];
float score;
public:
// add any member functions if necessary
};
Then
write four functions as below;
(1)
int readFromTextFile(char* fileName,
Student **students) that reads student records from a text file into a student array pointed by students and
returns the number of students, where
the format of the file is given as follows;
N // number of student records
Record_1
Record_2
¡¦
Record_N
where each record is given in a line as the figure
below
Note that the text of each field is left-aligned.
(2)
void writeToBinaryFile(char* fileName,
int n, Student *students) that writes n
elements of student array read by (1) into a binary file. The binary file
format should be identical with n
repetitions of Student class type except the head of the file. The head
contains the number of students as a 4-bytes integer value.
(3)
int readFromBinaryFile(char* fileName,
Student **students) that reads student
records from the binary file made by (2) into a student array pointed by students and
returns the number of students read
from the binary file.
(4)
void writeToTextFile(char* fileName,
int n, Student *students) that writes n
elements of students array read by (3) into a text file. The file format should
be identical with input file format given at (1).
Oral
test at the lab on May 17th.
Notice
1. The test data format will be same as sample data(sample).
Notice
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°ÍÀÔ´Ï´Ù. We will give main code and check it works well.