Styjun

Cops: The Hidden OEIS Substring

Professor falsely accusing me of cheating in a class he does not teach, two months after end of the class. What precautions should I take?

Does Google Maps take into account hills/inclines for route times?

Why would guns not work in the dungeon?

How can an advanced civilization forget how to manufacture its technology?

Filtering fine silt/mud from water (not necessarily bacteria etc.)

Package, repository and installation process in Linux

Is it rude to tell recruiters I would only change jobs for a better salary?

Why did the Japanese attack the Aleutians at the same time as Midway?

Would letting a multiclass character rebuild their character to be single-classed be game-breaking?

PIC12F675 GP4 doesn't work

What is temperature on a quantum level

As the Dungeon Master, how do I handle a player that insists on a specific class when I already know that choice will cause issues?

Bronze Age Underwater Civilization

How does a Potion of Poison work?

Would dual wielding daggers be a viable choice for a covert bodyguard?

How can one write good dialogue in a story without sounding wooden?

How to check the quality of an audio sample?

What explains 9 speed cassettes price differences?

QGIS Welcome page: What is 'pin to list' for?

How do I take a fraction to a negative power?

Were there any new Pokémon introduced in the movie Pokémon: Detective Pikachu?

How can I get both Giga Drain and Mach Punch on Breloom?

How do Windows version numbers work?

Writing/Reading a struct from a .txt file

How do I create an Excel (.XLS and .XLSX) file in C# without installing Microsoft Office?How do I create a Java string from the contents of a file?When to use struct?How do I tell if a regular file does not exist in Bash?Find and restore a deleted file in a Git repositorytypedef struct vs struct definitionsHow do I create a file and write to it in Java?Find all files in a directory with extension .txt in PythonCorrect way to write line to file?Delete a file or folder

.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty margin-bottom:0;

0

I'm trying to write an array of structs to a file, then read that file into an empty array of structs and print out the variables within each struct element of the array.

my code is below, currently I just have it to try to print the first element, but nothing is printed out to the screen.

#include <stdio.h>
#include <string.h>
#include <stdlib.h>

typedef struct
 char name[1024];
 int price;
 game;

void main()
 FILE *filename;
 filename = fopen("file.txt","w");

 game library[3]; //creation of our game library
 //initializing the array to be written, 3 structs inside this array should be written to the file in sizeof(game).
 strcpy(library[0].name,"Minecraft");
 strcpy(library[1].name,"Opium");
 strcpy(library[2].name,"Devil");
 library[0].price = 10;
 library[1].price = 20;
 library[2].price = 30;

 fwrite(library,sizeof(game),3,filename);
 fseek(filename,0,SEEK_SET);

 game second[3];
 printf("test");
 fread(second,sizeof(game),3,filename);
 printf("element 0 is %s $%d",second[0].name,second[0].price);
 fclose(filename);

c struct file-io

share|improve this question

asked Mar 26 at 4:02

Fireboy653Fireboy653

144 bronze badges

• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  
  you are opening the file in the "w" mode. You need to open in the "w+" mode to allow reading and writing.
  
  – Rishikesh Raje
  Mar 26 at 4:31
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  ah easy mistake, my code works now thanks! @RishikeshRaje
  
  – Fireboy653
  Mar 26 at 4:42
  
  

  
  
  
  

add a comment | 

0

I'm trying to write an array of structs to a file, then read that file into an empty array of structs and print out the variables within each struct element of the array.

my code is below, currently I just have it to try to print the first element, but nothing is printed out to the screen.

#include <stdio.h>
#include <string.h>
#include <stdlib.h>

typedef struct
 char name[1024];
 int price;
 game;

void main()
 FILE *filename;
 filename = fopen("file.txt","w");

 game library[3]; //creation of our game library
 //initializing the array to be written, 3 structs inside this array should be written to the file in sizeof(game).
 strcpy(library[0].name,"Minecraft");
 strcpy(library[1].name,"Opium");
 strcpy(library[2].name,"Devil");
 library[0].price = 10;
 library[1].price = 20;
 library[2].price = 30;

 fwrite(library,sizeof(game),3,filename);
 fseek(filename,0,SEEK_SET);

 game second[3];
 printf("test");
 fread(second,sizeof(game),3,filename);
 printf("element 0 is %s $%d",second[0].name,second[0].price);
 fclose(filename);

c struct file-io

share|improve this question

asked Mar 26 at 4:02

Fireboy653Fireboy653

144 bronze badges

• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  
  you are opening the file in the "w" mode. You need to open in the "w+" mode to allow reading and writing.
  
  – Rishikesh Raje
  Mar 26 at 4:31
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  ah easy mistake, my code works now thanks! @RishikeshRaje
  
  – Fireboy653
  Mar 26 at 4:42
  
  

  
  
  
  

add a comment | 

I'm trying to write an array of structs to a file, then read that file into an empty array of structs and print out the variables within each struct element of the array.

my code is below, currently I just have it to try to print the first element, but nothing is printed out to the screen.

#include <stdio.h>
#include <string.h>
#include <stdlib.h>

typedef struct
 char name[1024];
 int price;
 game;

void main()
 FILE *filename;
 filename = fopen("file.txt","w");

 game library[3]; //creation of our game library
 //initializing the array to be written, 3 structs inside this array should be written to the file in sizeof(game).
 strcpy(library[0].name,"Minecraft");
 strcpy(library[1].name,"Opium");
 strcpy(library[2].name,"Devil");
 library[0].price = 10;
 library[1].price = 20;
 library[2].price = 30;

 fwrite(library,sizeof(game),3,filename);
 fseek(filename,0,SEEK_SET);

 game second[3];
 printf("test");
 fread(second,sizeof(game),3,filename);
 printf("element 0 is %s $%d",second[0].name,second[0].price);
 fclose(filename);

c struct file-io

share|improve this question

asked Mar 26 at 4:02

Fireboy653Fireboy653

144 bronze badges

#include <stdio.h>
#include <string.h>
#include <stdlib.h>

typedef struct
 char name[1024];
 int price;
 game;

void main()
 FILE *filename;
 filename = fopen("file.txt","w");

 game library[3]; //creation of our game library
 //initializing the array to be written, 3 structs inside this array should be written to the file in sizeof(game).
 strcpy(library[0].name,"Minecraft");
 strcpy(library[1].name,"Opium");
 strcpy(library[2].name,"Devil");
 library[0].price = 10;
 library[1].price = 20;
 library[2].price = 30;

 fwrite(library,sizeof(game),3,filename);
 fseek(filename,0,SEEK_SET);

 game second[3];
 printf("test");
 fread(second,sizeof(game),3,filename);
 printf("element 0 is %s $%d",second[0].name,second[0].price);
 fclose(filename);

share|improve this question

asked Mar 26 at 4:02

Fireboy653Fireboy653

144 bronze badges

share|improve this question

asked Mar 26 at 4:02

Fireboy653Fireboy653

144 bronze badges

asked Mar 26 at 4:02

Fireboy653Fireboy653

144 bronze badges

asked Mar 26 at 4:02

Fireboy653Fireboy653

144 bronze badges