1 #import <Foundation/Foundation.h> 2  3 @interface Person : NSObject 4 { 5     //char *_name; 6     NSString *_name; 7 } 8 @end 9 10 int main()11 {12     /*13     // 最簡單的創建字符串的方式14     NSString *str = @"isdssf";15     16     char *name = "isdssf";17     18     19     NSLog(@"我在%@上課", str);20     //NSLog(@"%s", name);21     */22     23     int age = 15;24     int no = 5;25     NSString *name = @"哈哈jan";26     // length方法算的是字數27     int size = [name length];28     29     NSLog(@"%d", size);30     31     // 創建OC字符串的另一種方式32     NSString *newStr = [NSString stringWithFormat:@"My age is %d and no is %d and name is %@", age, no, name];33     34     35     NSLog(@"---- %ld", [newStr length]);36     37     return 0;38 }