Files: Copy a text file of integers.

/* Copy a text file of integers.*/
#include <stdio.h>
#include <stdlib.h>

int main (void)
{
// Local Declarations
FILE* spAppnd;
int   numIn;
int   closeResult;

// Statements
printf("This program appends data to a file\n");
spAppnd = fopen("P07-05.DAT", "a");
if (!spAppnd)
  {
   printf("Could not open input file\a\n");
   exit  (101);
  } // if open fail

printf("Please enter first number:  ");
while ((scanf("%d", &numIn)) != EOF)
  {
   fprintf(spAppnd, "%d\n", numIn);
   printf("Enter next number or <EOF> (Ctrl + d): ");
  } // while

closeResult = fclose(spAppnd);
if (closeResult == EOF)
  {
   printf("Could not close output file\a\n");
   exit  (201);
  } // if close fail

printf("\nFile append complete\n");
return 0;
} // main

/* Results:
First Run:
This program appends data to a file
Please enter first number:  1
Enter next number or <EOF>: 2
Enter next number or <EOF>: 3
Enter next number or <EOF>:^d
File append complete

Second Run:
This program appends data to a file
Please enter first number:  11
Enter next number or <EOF>: 12
Enter next number or <EOF>: 13
Enter next number or <EOF>: 14
Enter next number or <EOF>: 15
Enter next number or <EOF>:
File append complete

File after second run:
1
2
3
11
12
13
14
15
*/


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