Create a program that uses a menu with options to enter student information (name, ID, GPA),

Question

Need help asap. Create a program that uses a menu with options to enter student information (name, ID, GPA), print student information, or quit the program. Use data files and FILE pointers to store and print information entered. 

Answer 1

#include <stdio.h>

#include <string.h>

#include <stdlib.h>

#define STUDENT_NAME_LEN (255)

#define STUDENT_ID_LEN (55)

#define STUDENT_REC_FILENAME ("studentrecs.dat")

typedef struct _TStudentRec

{

char studentLastName[STUDENT_NAME_LEN];

char studentFirstName[STUDENT_NAME_LEN];

char studentID[STUDENT_ID_LEN];

double GPA;

} * TStudentRec;

char * SerializeStudentRecToCSV(TStudentRec studentRec, char * csvBuff )

{

sprintf(csvBuff,"%s,%s,%s,%12.6lf\n",studentRec->studentID,

studentRec->studentLastName,

studentRec->studentFirstName,

studentRec->GPA);

return(csvBuff);

}

void OutputStudentRec(TStudentRec studentRec, char * debugMsg)

{

if (debugMsg!=NULL)

{

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

printf(debugMsg);

printf("\n");

}

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

printf(" student id >%s< \n",studentRec->studentID);

printf(" student last name >%s< \n",studentRec->studentLastName);

printf(" student first name >%s< \n",studentRec->studentFirstName);

printf(" student GPA :%12.6lf \n",studentRec->GPA);

printf("----------------------------------------------------- \n");

}

void parseStudentRec( TStudentRec studentRec, char * csvBuff)

{

char token[255];

strcpy(studentRec->studentID,strtok(csvBuff,","));

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

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

strcpy(token,strtok(NULL,",")) ;

studentRec->GPA = atof(token);

OutputStudentRec(studentRec,(char *)"parsed student rec");

}

int menu()

{

int iReturn=-1;

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

printf(" Please Select One of these Options \n");

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

printf(" <1> INPUT NEW STUDENT RECORD \n");

printf(" <2> PRINT STUDENT RECORDS \n");

printf(" <0> EXIT // QUIT \n");

printf("------------------------------------------\n");

printf(" PLEASE SELECT ONE OF THESE OPTIONS :>");

scanf("%d",&iReturn);

return(iReturn);

}

int NewStudentRecord()

{

struct _TStudentRec studentRec;

char inbuff[255];

char outbuff[255];

printf(" Please input the student id # :>");

scanf("%s",inbuff);

char *commaPtr;

while ( (commaPtr=strchr(inbuff,','))!=NULL)

{

*commaPtr = '_';

}

strcpy(studentRec.studentID,inbuff);

printf(" Please input the student LAST NAME # :>");

scanf("%s",inbuff);

while ( (commaPtr=strchr(inbuff,','))!=NULL)

{

*commaPtr='_';

}

strcpy(studentRec.studentLastName,inbuff);

printf(" Please input the student FIRST NAME # :>");

scanf("%s",inbuff);

while ( (commaPtr=strchr(inbuff,','))!=NULL)

{

*commaPtr='_';

}

strcpy(studentRec.studentFirstName,inbuff);

double gpa=-1;

while (

(gpa>5) || (gpa<0)

)

{

printf(" Please input the student GPA :>");

scanf("%lf",&gpa);

}

studentRec.GPA = gpa;

SerializeStudentRecToCSV(&studentRec,outbuff);

FILE * fptr = fopen(STUDENT_REC_FILENAME,"a");

if (fptr!=NULL)

{

fprintf(fptr,outbuff);

fclose(fptr);

printf(" Student record saved \n");

}

}

void PrintStudentRecords()

{

char inbuff[255];

struct _TStudentRec curStudentRec;

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

if (fptr!=NULL)

{

while (fgets(inbuff,255,fptr)!=NULL)

{

parseStudentRec(&curStudentRec,inbuff);

OutputStudentRec(&curStudentRec,NULL);

}

fclose(fptr);

}

}

int Go()

{

int iReturn=-1;

while (

(iReturn = menu()) != 0

)

{

switch (iReturn)

{

case 1:

{

int iReturn = NewStudentRecord();

if (iReturn<0) { printf(" create new student record fails \n"); }

break;

}

case 2:

{

PrintStudentRecords();

break;

}

}

}

return 0;

}

int main()

{

return(Go());

}