10、哪个选项是下面代码的执行结果? name='Python语言程序设计课程' print(name[0],name[2:-2],name[-1]A.P thon语言程序设计 程B.P thon语言程序设计 课C.P thon语言程序设计课 程D.P thon语言程序设计课 课

10、哪个选项是下面代码的执行结果? name='Python语言程序设计课程' print(name[0],name[2:-2],name[-1]

A.P thon语言程序设计 程

B.P thon语言程序设计 课

C.P thon语言程序设计课 程

D.P thon语言程序设计课 课


参考答案和解析
2

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public class Pet{   private String name;   public Pet(){   System.out.print(1);  }   public Pet(String name){   System.out.print(2);  }   }   public class Dog extends Pet{  public Dog(String name){   //这里隐藏了一句代码:super.pet();   System.out.print(3);  }   }   执行new Dog(“棕熊”);后程序输出是哪项?() A、 23B、 1 3C、 123D、 321

public class Pet{   private String name;   public Pet(){   System.out.print(1);  }   public Pet(String name){   System.out.print(2);   }  }   public class Dog extends Pet{  public Dog(){   System.out.print(4);  }   public Dog(String name){   //这里隐藏了一句代码:super.pet();   this();   System.out.print(3);  }  }   执行new Dog(“棕熊”);后程序输出是哪项?() A、 143B、 423C、 243D、 1134

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单选题public class Pet{   private String name;   public Pet(){   System.out.print(1);  }   public Pet(String name){   System.out.print(2);  }  }   public class Dog extends Pet{  public Dog(){   System.out.print(4);  }   public Dog(String name){   super(name);   System.out.print(3);  }   }   执行new Dog(“棕熊”);后程序输出是哪项?()A 33B 13C 23D 123

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单选题public class Pet{     private String name;     public Pet(String name){       this.name = name;    }  public void speak(){     System.out.print(name); }  }  public class Dog extends Pet{     public Dog(String name){       super(name);    }  public void speak(){    super.speak();  System.out.print(“ Dog ”);    } }  执行代码   Pet pet = new Dog(“京巴”);  pet.speak();  后输出的内容是哪项?()A 京巴B 京巴 DogC nullD Dog京巴

单选题有以下程序:#include #include struct S{ char name[10];};main(){ struct S s1,s2; strcpy(s1.name,XXX); strcpy(s2.name,=); s1=s2; printf(%s,s1.name);}程序运行后的输出结果是(  )。A=BXXXC=XXDX=