C语言练习题组01

• c1^c2
• c1&c2
• ~c2
• c1|c2

#include<stdio.h>
#include<string.h>

int main() {
    int n;
    char y[10] = "ntse";
    char *x = y;
    n = strlen(x);
    *x = x[n];
    x++;
    printf("x=%s,", x);
    printf("y=%s\n", y);
    return 0;
}

• x=atse,y=
• x=tse,y=
• x=atse,y=e
• x=tse,y=e

struct node
{
    int value;
    struct node *next;
};
 
void rearrange(struct node *list)
{
   struct node *p, * q;
   int temp;
   if ((!list) || !list -> next)
      return;
   p = list;
   q = list -> next;
   while(q)
   {
       temp = p -> value;
       p -> value = q -> value;
       q -> value = temp;
       p = q -> next;
       q = p ? p -> next:0;
   }
} 

• 1, 2, 3, 4, 5, 6, 7
• 2, 1, 4, 3, 6, 5, 7
• 1, 3, 2, 5, 4, 7, 6
• 2, 3, 4, 5, 6, 7, 1

• *(&a[0][0]+5)
• ((a+1)+1)
• *(&a[1]+1)
• *(a[1]+1)

#include <iostream>
using namespace std;

int main() 
{
    char str1[] = "hello world";  
    char str2[] = "hello world";  

    const char str3[] = "hello world";  
    const char str4[] = "hello world";  

    const char* pstring1 = "hello world";  
    const char* pstring2 = "hello world";  

    cout << boolalpha << ( str1==str2 ) <<  ',' ; 
    cout << boolalpha << ( str3==str4 ) << ',' ;  
    cout << boolalpha << ( pstring1==pstring2 ) <<endl;

    return 0;
}

• false,false,true
• false,false,false
• true,true,true
• false,true,true

• char* sp, s[10]; sp = “Hello”;
• char* sp, s[10]; s = “Hello”;
• char str1[10] = “computer”, str2[10]; str2 = str1;
• char mark[]; mark = “PROGRAM”;

struct A{
  void foo(){printf("foo");}
  virtual void bar(){printf("bar");}
  A(){bar();}
};
struct B:A{
  void foo(){printf("b_foo");}
  void bar(){printf("b_bar");}
};

A *p = new B;
p->foo();
p->bar();

• barfoob_bar
• foobarb_bar
• barfoob_foo
• foobarb_fpp

• 17
• 15
• 16
• 1

int fun (int *c)  { … }
void main(){
    int (*a)(int*)=fun,*b(),w[10],c;
	// ... ...
}

• a=a(w)；
• (*a)(&c)；
• b=*b(w);
• fun(b);

unsigned int a = 0x1234;
unsigned char b = *(unsigned char *)&a; 

• 0x00
• 0x12
• 0x34
• 0x1234
  
  
  
  

练习答案