James (MrGeckosMedia.com), joined by, Noah (RockntheSweater.com), and Karl, explains how file managing works in c and cocoa.

7:49

Example code from episode.
Files C Example

```

import

BOOL file_exist(const char fileName) {
FILE file = fopen(fileName, "r");
if (file) {
fclose(file);
return YES;
}
return NO;
}

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

const char *ourFile = [[@"~/Desktop/file.txt" stringByExpandingTildeInPath] UTF8String];  
FILE *file;

if (!file\_exist(ourFile)) {  
    file = fopen(ourFile, "w");  
    time\_t currTime = time(NULL);  
    fprintf(file, "%s: We just made this file.\n", ctime(&currTime));  
} else {  
    file = fopen(ourFile, "a");  
}  
time\_t currTime = time(NULL);  
fprintf(file, "%s: Here is a new line in this file.\n", ctime(&currTime));  
fclose(file);


[pool drain];  
return 0;

}

``` Files Cocoa Exmaple

```

import

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

NSFileManager *manager = [NSFileManager defaultManager];  
NSString *ourFile = [@"~/Desktop/file.txt" stringByExpandingTildeInPath];  
NSFileHandle *file;

if (![manager fileExistsAtPath:ourFile]) {  
    [manager createFileAtPath:ourFile contents:nil attributes:nil];  
    file = [NSFileHandle fileHandleForWritingAtPath:ourFile];  
    [file writeData:[[NSString stringWithFormat:@"%@: Here is a new file.\n", [NSDate date]] dataUsingEncoding:NSUTF8StringEncoding]];  
} else {  
    file = [NSFileHandle fileHandleForWritingAtPath:ourFile];  
    [file seekToEndOfFile];  
}  
[file writeData:[[NSString stringWithFormat:@"%@: Here is a new line.\n", [NSDate date]] dataUsingEncoding:NSUTF8StringEncoding]];  
[file closeFile];

[pool drain];  
return 0;

}

```

Keynote used in this Episode
Keynote in PDF Format