/**
 * Example of opening a file for reading  and then reading from that file
 * 
 * also fprintf
 * 
 * @author gtowell
 * Created March 2021
 * **/

#include <stdio.h>

#ifndef NULL
#define NULL (void *) 0
#endif

#define LINE_LEN 256

int main(int argc, char const *argv[])
{
    FILE *fInput = fopen("OpenClose.c", "r");
    // any time you open a file check to make sure it opened!!!!
    if (NULL == fInput) {
        fprintf(stderr, "Failed to open file for reading ... terminating\n");
        return 1;
    }
    // reading a file looks exactly line reading from stdin
    // indeed stdin is of type FILE*
    char line[LINE_LEN];
    while (NULL != fgets(line, LINE_LEN, fInput)) {
        fprintf(stdout, "%s", line);
    }
    // if you open a file close it
    fclose(fInput);
    return 0;
}