file_eof.c

c primer plus 第五版 的源代码

// file_eof.c --open a file and display it
#include <stdio.h>
#include <stdlib.h>  // for exit()
int main()
{
    int ch;
    FILE * fp;
    char fname[50];         // to hold the file name

    printf("Enter the name of the file: ");
    scanf("%s", fname);
    fp = fopen(fname, "r"); // open file for reading
    if (fp == NULL)         // attempt failed
    {
	    printf("Failed to open file. Bye\n");  	
	    exit(1);             // quit program
    }
// getc(fp) gets a character from the open file
    while ((ch = getc(fp)) != EOF)
        putchar(ch);
    fclose(fp);             // close the file
  
    return 0;
}