Xcode中学习间接时遇到的问题

以下代码编译时出现问题，在All Output窗口中显示“(lldb) ”，本人初学者，请教高手，问题出在哪里？#import <Foundation/Foundation.h>typedef enum {
    kCircle,
    kRectangle,
    kOblateSpheroid
} ShapeType;typedef enum {
    kRedColor,
    kGreenColor,
    kBlueColor
} ShapeColor;typedef struct {
    int x, y, width, height;
}ShapeRect;typedef struct {
    ShapeType type;
    ShapeColor fillColor;
    ShapeRect bounds;
}Shape;NSString *colorName(ShapeColor colorName)
{
    switch(colorName) {
        case kRedColor:
            return (@"red");
            break;
        case kGreenColor:
            return (@"green");
            break;
        case kBlueColor:
            return (@"blue");
            break;
    }
    
    return (@"no clue");
}void drawCircle(ShapeRect bounds,ShapeColor fillColor)
{
    NSLog(@"drawing a circle at (%d %d %d %d) in %@",bounds.x, bounds.y, bounds.width, bounds.height, colorName(fillColor));
}void drawRectangle(ShapeRect bounds,ShapeColor fillColor)
{
    NSLog(@"drawing a Rectangle at (%d %d %d %d) in %@",bounds.x, bounds.y, bounds.width, bounds.height, colorName(fillColor));
}void drawEgg(ShapeRect bounds,ShapeColor fillColor)
{
    NSLog(@"drawing a OblateSpheroid at (%d %d %d %d) in %@",bounds.x, bounds.y, bounds.width, bounds.height, colorName(fillColor));
}void drawShapes(Shape shapes[], int count)
{
    int i;
    for (i = 0; i < count; i++) {
        
        switch (shapes[i].type) {
            case kCircle:
                drawCircle(shapes[i].bounds, shapes[i].fillColor);
                break;
            case kRectangle:
                drawRectangle(shapes[i].bounds, shapes[i].fillColor);
                break;
            case kOblateSpheroid:
                drawEgg(shapes[i].bounds, shapes[i].fillColor);
                break;
        }
    }
        
}int main(int argc, const char * argv[])
{    @autoreleasepool {
        
        Shape shapes[3];
        
        ShapeRect rect0 = { 0, 0, 10, 30 };
        shapes[0].type = kCircle;
        shapes[0].fillColor = kRedColor;
        shapes[0].bounds = rect0;
        
        ShapeRect rect1 = { 30, 40, 50, 60 };
        shapes[1].type = kRectangle;
        shapes[1].fillColor = kGreenColor;
        shapes[1].bounds = rect1;
        
        ShapeRect rect2 = { 15, 18, 37, 29 };
        shapes[2].type = kOblateSpheroid;
        shapes[2].fillColor = kBlueColor;
        shapes[2].bounds = rect2;
        
        drawShapes(shapes, 3);
        
    }
    return 0;
}