Test code for arrays in Objective-C

    double income1;
    double income2;
    double income3;
    income1 = 150000.00;
    income2 = 2103456.78;
    income3 = 555555.55;
    income1 = income1 + income1*0.10;
    income2 = income2 + income2*0.10;
    income3 = income3 + income3*0.10;
    NSLog(@"income1: %6.2f", income1);
    NSLog(@"income2: %6.2f", income2);
    NSLog(@"income3: %6.2f", income3);
    
    
    double income[3];  // array of doubles
    
    income[0] = 150000.00;
    income[1] = 2120456.78;
    income[2] = 555555.55;
    for(int i = 0; i <3; i++)
        income[i] = income[i] + income[i]*0.10;
    for(int i = 0; i <3; i++)
        NSLog(@"income %2d: %6.2f", i, income[i]);

    NSString *words[5]; // C-style array of NSStrings
    words[0] = @"this";
    words[1] = @"class";
    words[2] = @"is";
    words[3] = @"so";
    words[4] = @"easy";
    for( int i = 0; i < 5; i++ )
        NSLog(@"%@ ", words[i]);

    // NSArray of NSStrings
    NSArray *temp = [NSArray arrayWithObjects:@"one",@"two",@"three",nil];
    for( int i = 0; i < temp.count; i++ )
        NSLog(@"%@", temp[i]);
    for( int i = 0; i < temp.count; i++ )
        NSLog(@"%@", [temp objectAtIndex:i]);
    
    // NSMutableArray of NSStrings
    NSMutableArray *strings = [[NSMutableArray alloc] init];
    [strings addObject:@"hey"];
    [strings addObject:@"there"];
    for( int i = 0; i < strings.count; i++ )
        NSLog(@"%@", strings[i]);

    [strings addObject:@"hello"];
    for( int i = 0; i < strings.count; i++ )
        NSLog(@"%@", [strings objectAtIndex:i]);