56 lines
1.3 KiB
C
56 lines
1.3 KiB
C
|
#include <stdio.h>
|
||
|
|
#include <stdlib.h>
|
||
|
|
|
||
|
|
// Main () - execution starts here
|
||
|
|
int main (void)
|
||
|
|
{
|
||
|
|
// Declate file stream variables
|
||
|
|
FILE *fInput, *fOutput;
|
||
|
|
|
||
|
|
// Other variables needed
|
||
|
|
int i, d, d2;
|
||
|
|
|
||
|
|
// Try and open the text "sample.txt" (in the current directory) file for writing
|
||
|
|
fOutput = fopen ("numbers.txt", "w");
|
||
|
|
|
||
|
|
// Check we were able to open the file
|
||
|
|
if ( fOutput == NULL)
|
||
|
|
{
|
||
|
|
printf ("The file could not be opened for writing, exiting\n");
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Use a loop to write values to the newly created file
|
||
|
|
for ( i = 1 ; i <= 10 ; i++)
|
||
|
|
{
|
||
|
|
fprintf (fOutput, "%d %d\n", i, i*i);
|
||
|
|
}
|
||
|
|
|
||
|
|
// And close the file
|
||
|
|
fclose (fOutput);
|
||
|
|
|
||
|
|
// Try and open the binary "numbers " (in the current directory) file for reading
|
||
|
|
|
||
|
|
fInput = fopen ("numbers.txt", "r");
|
||
|
|
|
||
|
|
// Check we were able to open the file
|
||
|
|
if ( fInput == NULL)
|
||
|
|
{
|
||
|
|
printf ("The file could not be opened for reading, exiting\n");
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Read, line by line the 10 values written into variable d
|
||
|
|
// and then display the contents of d on the screen
|
||
|
|
for ( i = 1 ; i <= 10 ; i++)
|
||
|
|
{
|
||
|
|
fscanf (fInput, "%d %d", &d, &d2);
|
||
|
|
printf ("Value read from file: %d %d\n", d, d2);
|
||
|
|
}
|
||
|
|
|
||
|
|
// And close the file
|
||
|
|
fclose (fInput);
|
||
|
|
|
||
|
|
return (0); // Exit indicating success
|
||
|
|
}
|