Add and display record using structures and file

How to add and display record using structures and file (fprintf) 

/*Program to add and display record using structures and file*/

#include<stdio.h>

#include<conio.h>

//structure for person

struct person

{

char name[30];

unsigned long pn;

};

//main function

int main()

{

int choice;

FILE *fp;

struct person p;

clrscr();

//open file in append mode

fp=fopen("person.txt","a+");

if(fp==NULL)

{

printf("FILE CAN'T OPEN.\n");

exit(1);

}

//menu

while(1)

{

printf("\n1.Add Record\n");

printf("2.Display Records\n");

printf("3.EXIT\n");

printf("Enter your choice...\n");

scanf("%d",&choice);

switch(choice)

{

//Add Record in file

case 1:printf("Enter name & Phone number\n");

scanf("\n\n %s %lu",p.name,&p.pn);

fprintf(fp,"%s %pn \n" ,p.name,p.pn);

break;

//Display records from begining

case 2:fseek(fp,0,SEEK_SET);

while(fscanf(fp,"%s %lu",p.name,&p.pn)!=EOF)

printf("\n\n %s %lu \n",p.name,p.pn);

break;

//exit

case 3:exit(1);

default:printf("UNKNOWN CHOICE\n");

}

}

//close file

fclose(fp);

}

 

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