NSString. Write to file. Read from file.

This small program below show the simplest way to create an ASCII text file, write a string into it and read the string from the file:

#import <Foundation/Foundation.h>

int main (int argc, const char * argv[]) 
{
    NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];

    NSString* lastLine    = @"Beauty is truth, truth beauty";
    NSString* fileName    = @"GrecianUrn.txt";
    NSString* homeDir    = NSHomeDirectory();
    
    NSString* fullPath = [homeDir stringByAppendingPathComponent:fileName];
    
    NSError* error = nil;
    [lastLine writeToFile:fullPath atomically:NO encoding:NSASCIIStringEncoding error:&error];
    
    NSStringEncoding encoding;
    NSString* contents = [NSString stringWithContentsOfFile:fullPath usedEncoding:&encoding
                          error:&error];
    
    NSLog(@"Content of '%@': %@", fileName, contents);
    
    [pool drain];
    return 0;
}