how to put info from a file into a C struct?

[jl3574]

i have a simple C question with file struct
if i create a simple struct

struct person_info
{
char firstname[10];
char lastname[10];
int age;
}

if i have a binary file with this exact structure and i want to put the info onthe file into this struct how would i do so?
i know i have to create a file pointer
FILE *filname
filename=fopen("personInfoFile","r"
i would open the file for reading and then what? help...
thx

 

[palbano]

struct person_info pi;
FILE* pfile = fopen("personInfoFile", "r");
// read one structure from the file
fread( &pi, sizeof(pi),1, pfile);

-pete

 

[jl3574]

thx pete
one more question
what if i just want to reference to just one of the feilds in the struct from the file?
- john

 

[Salem]

> what if i just want to reference to just one of the feilds in the struct from the file?
Normally, you would just fread()/fwrite() the complete record as a single entity, then access individual fields within memory.

 

[palbano]

What Salem said, otherwise you have to manage the file pointer postion (fseek(), fsetpos())and read the correct number of bytes from the file.

-pete