Help compiling random access file

[newbc]

well what I want to do is create 9 accounts then add data to them and finally display and save the result but I am stuck with com pile errors.

I am using gcc to compile; like this

gcc nameofprogram.c

is this ok?

it keeps saying cfptr is never declared. and I don't know what to do.

here is my code.

#include <stdio.h>


int main (void ){


struct clientdata{
	int acct;
	char name[20];
	char lastn[20];
	int age;
	char sex[2];	
	float	height;	
	float weight;
	int membership;
	};//end struct



  int i;
  int j=101;
 
  struct clientdata client={0, "", "", 0, "", 0.0, 0.0, 0};
  
  FILE *cfptr;


  if((cfprt=fopen( "customers.dat", "wb+" ))== NULL) {
  printf( "file could not be opened\n");}

  else{ 

  for(i=101; i <= 109;i++){
  fwrite(&client, sizeof( struct clientdata), 1, cfptr);
  }


  printf("Enter acct number"
	"(101 to 105, 0 to end input\n");

  scanf("%d", &client.acct);

  while(client.acct != 0){

	printf("Enter name, last name, age, sex\n");
	printf("height, weight, and membership years\n");

	fscanf( stdin, "%s%S%d%s%f%f%d", client.name, client.lastn,
	&client.age, client.sex, &client.height, &client.weight, &client.membership);

	fseek( cfptr, (client.acct - 1) * 
	sizeof( struct clientdata), SEEK_SET);

	fwrite(&client, sizeof( struct clientdata), 1, cfptr);

	printf("Enter acct number\n");
	scanf("%d", &client.acct);

  }  // end while


  printf("%-5s%-20S%-20s%-4s%-5s%-5s%-5s%-11s\n", "Acct", "Name",
  "last name", "Age", "sex", "height", "weight", "membership");

  
  while(j<=109){
	fread(&client, sizeof(struct clientdata), 1, cfptr);
	if(client.acct !=0){
	  printf("%-5d%-20S%-20s%-4d%-5s%-5f%-5f%-11d\n",
	  client.acct, client.name, client.lastn,
	  client.age, client.sex, client.height, client.weight, client.membership);
	} //end if
  } //end 2nd.while


  fclose(cfptr);

} //end else

  return 0;

} //ends main

[jimblumberg]

Check your spelling.

Jim

[newbc]

LoL, my eyes hurt by now thanks I was going crazy.

second question so will I be able to update everytime with out a problem? becuase the second part is to delete an account, and modify one. I new to file processing and I pick (wb+)

ok so my code stop after I enter the account I made some changes to the code but is still doesn't work.

 while(!feof(cfptr)){
	fread(&client, sizeof(struct clientdata), 1, cfptr);
	if(client.acct !=0){
	  printf("%-5d%-20S%-20s%-4d%-5s%-5f%-5f%-11d\n",
	  client.acct, client.name, client.lastn,
	  client.age, client.sex, client.height, client.weight, client.membership);
	} //end if
  } //end 2nd.while


  fclose(cfptr);

[CommonTater]

Look very closely....

 FILE *cfptr;

  if((cfprt=

See anything wrong?

[Bayint Naung]

gcc nameofprogram.c

Recommended is

gcc -Wall -ansi -pedantic prog.c

If you don't specify -ansi, gcc will assume gcc C. and you'll have many non-standard things compile cleanly. like nested function, void pointer arithmetic. etc,

[jimblumberg]

When I compile your code I get these messages:

main.c||In function ‘main’:|
main.c|49|warning: ISO C does not support the ‘%S’ gnu_scanf format|
main.c|49|warning: format ‘%S’ expects type ‘wchar_t *’, but argument 4 has type ‘char *’|
main.c|63|warning: ISO C does not support the ‘%S’ gnu_printf format|
main.c|63|warning: format ‘%-20S’ expects type ‘wchar_t *’, but argument 3 has type ‘char *’|
main.c|71|warning: ISO C does not support the ‘%S’ gnu_printf format|
main.c|71|warning: format ‘%-20S’ expects type ‘wchar_t *’, but argument 3 has type ‘char *’|
||=== Build finished: 0 errors, 6 warnings ===|

I also suspect the fseek line will cause problems.

Jim