File I/O



#include <stdio.h>
void main( )
{
  	FILE *fp;
  	int outgoing;
  	int incoming;
 
  	printf("Enter a value to write to MyFile: ");
  	scanf("%d", &outgoing);
 
  	fp = fopen("MyFile", "w");
  	fprintf(fp, "%d\n", outgoing);
  	fclose(fp);
 
  	fp = fopen("MyFile", "r");
  	fscanf(fp, "%d", &incoming);
  	fclose(fp);
  
  	printf("The value read in from the file id %d\n", incoming);
}

Sample Output:

UNIX prompt >>a.out
Enter a value to write to MyFile: <user enters 98>
The value read in from the file id 98

UNIX prompt >> more MyFile
98

Note:
FOPEN and FCLOSE work the same way as they do in MATLAB.

That's pretty much all there is to it!