为什么我使用char*_name无法使用set设置中文(基础)

/*

定义一个学生,学生有学号 姓名  还有 C语言分数 和JAVA语言分数  总分 平均分

*/

#import <Foundation/Foundation.h>

@interface Student : NSObject

{

    

    char *_name;

    int  _cScort;

    int  _javaScort;

    int  _conuntScort;

    int  _avgScort;

}



- (void)setName:(char *)name;

- (void)setCScort:(int)cScort;

- (void)setJavaScort:(int)javaScort;



- (char *)name;

- (int)cScort;

- (int)javaScort;



- (int)conuntScort;

- (int)avgScort;



- (void)printInfo;

@end



@implementation Student



- (void)setName:(char *)name

{

    _name = name;

}

- (void)setCScort:(int)cScort

{

    _cScort = cScort;

    _conuntScort = _cScort + _javaScort;

    _avgScort = _conuntScort / 2;

}

- (void)setJavaScort:(int)javaScort

{

    _javaScort = javaScort;

    _conuntScort = _cScort + _javaScort;

    _avgScort = _conuntScort / 2;



}



- (char *)name

{

    return _name;

}

- (int)cScort

{

    return _cScort;

}

- (int)javaScort

{

    return _javaScort;

}



- (int)conuntScort

{

    return _conuntScort;

}

- (int)avgScort

{

    return _avgScort;

}



- (void)printInfo

{

    NSLog(@"学生是%s",_name);

}

@end





int main()

{

    Student *s = [Student new];

    [s setCScort:90];

    [s setJavaScort:90];

    [s setName:"dd"];//这边使用中文为什么不行?????

    NSLog(@"%s的总分是=%d,平均=%d",[s name],[s conuntScort],[s avgScort]);

    return 0;

}