1 void changeStr2(NSString **str3) 2 { 3 *str3 = @"789"; 4 } 5 6 int main(int argc, const char * argv[]) { 7 @autoreleasepool { 8 NSString *str = @"456"; 9 changeStr2(&str); 10 NSLog(@"The string is %@", str); 11 } 12 return 0; 13 }
原文：http://www.cnblogs.com/hellovoidworld/p/4119393.html