C/stdio.h/fseek

fseek: moves the file position pointer

<source lang="cpp">

//Header file: #include <stdio.h> //Declaration: int fseek(FILE *stream, long int offset, int origin); //Return: zero on success or nonzero on failure. //"origin" must be one of:

//Name Meaning //SEEK_SET: Seek from start of file //SEEK_CUR: Seek from current location //SEEK_END: Seek from end of file

 #include <stdio.h>
 #include <stdlib.h>
 struct fullname {
   char firstName[40];
   char lastName[10];
 } info;
 int main(void){
   FILE *fp;
   if((fp=fopen("test", "rb")) == NULL) {
     printf("Cannot open file.\n");
     exit(1);
   }
   int client_num = 10;
   /* find the proper structure */
   fseek(fp, client_num*sizeof(struct fullname), SEEK_SET);
   /* read the data into memory */
   fread(&info, sizeof(struct fullname), 1, fp);
   fclose(fp);
 }

      </source>