computer science

Question

Write a program that will read names, ids, dept names, and cgpa of some students from a file and will show the results. Consider that the name of the file is ‘input.csv’. It is just a text file where each line holds information of one student.

Example format of two lines in the file is as follows: Moinul Islam, 21, Computer Science, 3.98 Abu Hena, 11, Finance, 3.45

Read all information from the file, and print them on screen (one student per line). Your program should use the following structure to hold information of a student

typedef struct { char name[50]; int id; char dept[20]; double cgpa; } student;

Answer 1

#include <stdio.h>

#include <string.h>

#include <stdlib.h>

#define STUDENT_NAME_LENGTH (50)

#define DEPARTMENT_NAME_LENGTH (20)

#define MAX_NUM_STUDENTS (1000)

typedef struct

{

char name[STUDENT_NAME_LENGTH];

int id;

char dept[DEPARTMENT_NAME_LENGTH];

double cgpa;

} student;

typedef student _TStudent;

typedef _TStudent * TStudent;

void Student_Parse(TStudent studentRec, char * studentRecBuff)

{

strcpy(studentRec->name,strtok(studentRecBuff,","));

studentRec->id = atoi(strtok(NULL,","));

strcpy(studentRec->dept,strtok(NULL,","));

studentRec->cgpa = atof(strtok(NULL,","));

printf(" incoming student rec parsed : name >%s< id = %d dept=>%s< gpa = %6.2f \n",studentRec->name,

studentRec->id,

studentRec->dept,

studentRec->cgpa);

}

typedef struct _TStudentDB

{

_TStudent students[MAX_NUM_STUDENTS];

int numStudents;

} *TStudentDB;

void ReadStudentFile(TStudentDB studentDB,char * filename)

{

char inbuff[255];

int iIndexPos=0;

studentDB->numStudents=0;

FILE * fptr = fopen(filename,"r");

if (fptr!=NULL)

{

while (!feof(fptr))

{

fgets(inbuff,255,fptr);

if (iIndexPos>=MAX_NUM_STUDENTS) { break; }

Student_Parse(&studentDB->students[iIndexPos++],inbuff);

if (feof(fptr)) { break; }

}

studentDB->numStudents=iIndexPos;

fclose(fptr);

}

else

{

studentDB->numStudents=0;

iIndexPos = -1;

}

}

void DumpStudentRecs(TStudentDB studentDB,char * strMsg)

{

int i;

int N = studentDB->numStudents;

_TStudent curStudentRec;

if (strMsg!=NULL)

{

printf("*************************************************\n");

printf(strMsg);

}

printf("\n************************************************************\n");

for (i=0; i<N; i++)

{

curStudentRec = studentDB->students[i];

printf(" student rec # %d of %d : name >%s< id = %d dept=>%s< gpa = %6.2f \n",(i+1),N,

curStudentRec.name,

curStudentRec.id,

curStudentRec.dept,

curStudentRec.cgpa);

}

}

int main()

{

struct _TStudentDB studentDB;

char filename[55]; strcpy(filename,"E:\\input.csv");

char strmsg[55];

ReadStudentFile(&studentDB,filename);

printf(" read %d student record(s) from file \n",studentDB.numStudents);

sprintf(strmsg,"STUDENT RECS READ FROM FILE %s",filename);

DumpStudentRecs(&studentDB,strmsg);

}

and the file....

>cat input.csv

Moinul Islam,21,Computer Science,3.98

Abu Hena,11,Finance,3.45

Patrick Baldwin,33,Engineering,3.25

Shannon Jones,55,Communications,3.25