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C: how to print content of file after seek
#include <stdio.h>

int main(int argc, char *argv[]){
  FILE *fr;

  if (fr = fopen (argv[1], "r")){
    fseek(fr, 100, SEEK_CUR);

    char c[1];
    while (fread(c, 1, sizeof(c),fr) > 0)
        printf("%s", c);

    fclose(fr);
  }
  else{
    perror("File does not exist");
  }

}

#include <stdio.h>
#include <sys/stat.h>

int main(int argc, char *argv[])
{
    FILE *fr;
    char c[1];
    struct stat sb;

    // obtains information about the file
    if (stat(argv[1], &sb) == -1)
    {
        perror("stat()");
        return(1);
    };

    // verifies the file is over 100 bytes in size
    if (sb.st_size < 101)
    {
       fprintf(stderr, "%s: file is less than 100 bytesn", argv[1]);
       return(1);
    };

    // opens the file, or prints the error and exists
    if (!(fr = fopen (argv[1], "r")))
    {
        perror("fopen():");
        return(1);
    };

    fseek(fr, 100, SEEK_CUR);

    while (fread(c, sizeof(c), 1, fr) > 0)
        printf("%c", c[0]);

    fclose(fr);

    return(0);
}

while (fread(c, sizeof(char), 1023, fr) > 0)
    {
        c[1023] = '';
        printf("%s", c);
    };

printf("%c",*c);