Thread: Adding structure data in txt file not working

Do you realize that myaddress2 is a type not an instance of your structure?

ok i am confused



what is the difference between

Code:

struct home_address2{

char local_street2[100];
char town2[60];
char city2[60];
char country2[60];
}myaddress2;

Code:

typedef struct home_address2{

char local_street2[100];
char town2[60];
char city2[60];
char country2[60];
}myaddress2;

type and variable/instance not same?
when i use this code

Code:

struct home_address2{

char local_street2[100];
char town2[60];
char city2[60];
char country2[60];
}myaddress2;

it runs but nothing is added to address.txt file yet?

yes i understand tht fscanf is input function

i just want to take data from user and store it in address.txt file

what is the difference between

The first snippet is creating an instance of the structure home_address2 named myaddress2. It is the same as the following:

Code:

// Define the structure.
struct home_address2{ 
char local_street2[100];
char town2[60];
char city2[60];
char country2[60];
};

// Now create an instance of that structure.
struct home_address2 myaddress2;

The second snippet is creating an alias for the home_address2 type named myaddress2. This is a type (because of the typedef) not an instance of the structure.

Code:

struct home_address2{
char local_street2[100];
char town2[60];
char city2[60];
char country2[60];
};

// Create an alias of the home_address2 struct.
typedef struct home_address2 myaddress2;

// Now create an instance of the structure using the typedef.
myaddress2 my_address;  // Notice that the struct keyword is not needed.

this works but

after i enter street name
town the cursor jump to country

Code:

#include <stdio.h>#include <stdlib.h>
#include<windows.h>
/* Use of typedef in Structure */




struct home_address2{


char local_street2[100];
char town2[60];
char city2[60];
char country2[60];
}myaddress2;






int main(){


FILE *ptr;
ptr=fopen("address.txt","a");




    printf("\t\t\t\xB2\xB2\xB2\ ADD RECORD  \xB2\xB2\xB2\xB2");
    printf("\n\n\nEnter Street Address: ");
    scanf(" %s",&myaddress2.local_street2);
    printf("\n\n\nEnter Town: ");
    scanf(" %s ",&myaddress2.town2);
    printf("\n\n\nEnter City: ");
    scanf(" %s",&myaddress2.city2);
    printf("\n\n\nEnter Country: ");
    scanf(" %s",&myaddress2.country2);


    fscanf(ptr,"%s %s %s  %s\n",&myaddress2.local_street2,&myaddress2.town2,&myaddress2.city2,&myaddress2.country2);
    fprintf(ptr,"%s %s %s  %s\n",&myaddress2.local_street2,&myaddress2.town2,&myaddress2.city2,&myaddress2.country2);








    fclose(ptr);
    printf("data added");
return 0;


}

i added space here

Code:

 scanf(" %s ",&myaddress2.town2);

but still same thing happens