这是我跟着老师的代码敲的，6.设计一个类Circle，用来表示二维平面中的圆
1> 属性
* double radius （半径）
* Point2D *point （圆心）

2> 方法
* 属性相应的set和get方法
* 设计一个对象方法判断跟其他圆是否相交（重叠返回YES，否则返回NO）
* 设计一个类方法判断两个圆是否相交（重叠返回YES，否则返回NO）
然后敲完之后就5个警告，看不出来在哪。。。谁帮帮忙~~~~我只是稍微按自己的理解改动了点成员变量和方法中的变量名。。。

#import <Foundation/Foundation.h>
#import <math.h>

@interface Point2D : NSObject
{
    double _x;
    double _y;
   
}
- (void)setX:(double)x;
- (double)x;

- (void)setY:(double)y;
- (double)y;

- (void)setX:(double)x andY:(double)y;

- (double)distanceWithOther :(Point2D *)other;

+ (double)distanceWithPonit1:(Point2D *)point1 andPoint2:(Point2D *)point2;
@end

@implementation Point2D
- (void)setX:(double)x
{
    _x = x;
}
- (double)x
{
    return _x;
}

- (void)setY:(double)y
{
    _y = y;
}
- (double)y
{
    return _y;
}

- (void)setX:(double)x andY:(double)y
{
    _x = x;
    _y = y;
}

- (double)distanceWithOther :(Point2D *)other
{
    return  [Point2D distanceWithPonit1:self andPoint2:other];
}


+ (double)distanceWithPonit1:(Point2D *)point1 andPoint2:(Point2D *)point2
{
    double xDelta = [point1 x] - [point2 x];
    double xDeltaPingFang = pow(xDelta, 2);
   
    double yDelta = [point1 y] - [point2 y];
    double yDeltaPingFang = pow(yDelta, 2);
   
    return sqrt(xDeltaPingFang + yDeltaPingFang);

}
@end

@interface Circle : NSObject
{
    double _radius;
    Point2D *_point;
}
- (void)setRadius:(double)radius;
- (double)radius;

- (void)setPoint:(Point2D *)point;
- (Point2D *)point;

- (BOOL)isInteraceWithOther:(Circle *)other;
+ (BOOL)isInteraceBetweenCircle1:(Circle *)circle1 andCircle2:(Circle *)circle2;
@end

@implementation Circle
- (void)setRadius:(double)radius
{
    _radius = radius;
}
- (double)radius
{
    return _radius;
}

- (void)setPoint:(Point2D *)point
{
    _point = point;
}
- (Point2D *)point
{
    return _point;
}
- (BOOL)isInteraceWithOther:(Circle *)other
{
    return [Circle isInteraceBetweenCircle1:self andCircle2:other];
}
+ (BOOL)isInteraceBetweenCircle1:(Circle *)circle1 andCircle2:(Circle *)circle2
{
    Point2D *point1 = [circle1 point];
    Point2D *point2 = [circle2 point];
   
    double distance = [point1 distanceWithOther:point2];
    double radiusSum = [circle1 radius] + [circle2 radius];
   
    return distance < radiusSum;
}
@end
int main ()
{
    Circle *c1 = [Circle new];
    [c1 setRadius:2];
   
    Point2D *p1 = [Point2D new];
    [p1 setX:10 andY:10];
    [c1 setPoint :p1];
   
    Circle *c2 = [Circle new];
    [c2 setRadius:2];
   
    Point2D *p2 = [Point2D new];
    [p2 setX:13 andY:14];
    [c2 Point2D :p2];
   
    BOOL b1 = [c1 isInteractWithOther:c2];
   
    BOOL b2 = [Circle isInteractBetweenCircle1:c1 andCircle2:c2];
   
    NSLog(@"%d %d", b1, b2);
   
    return 0 ;

}

为什么有笑脸？？

额 你别直接粘贴啊  有插入代码的按钮 要不然看着乱 还容易被解析成表情

这个是OC吧，还没学到那。。。

目测 缺少冒号  ,冒号也是方法名的一部分

要不就是类型没用括号包起来

第35行有语法错误