1、以下代码的输出结果是多少？

int main(){    int i = 1;    i = ++i + ++i + ++i;    printf("%d\n", i);    printf("%d %d %d",i,++i,i++);}

int main(){     int a = 1, b = 1, c;     c = a+++b;     printf("%d, %d, %d", a, b, c);}

int main(){      int a = 1, b = 1, d = 1;      printf("%d, %d, %d", ++a + ++a+a++, a++ + ++b, ++d + d++ + a++);}

int main(){    int i = 0;    int x = i++, y = ++i;    printf("%d % d\n", x, y);}

 

2、以下代码的输出结果是多少？

int main() //{    int x = 4;    int *p = &x;    int *k = p++;    int r = p - k;    printf("%d", r);}

 

3、以下代码的输出结果是多少？

int main(){    int a = 5, b = -7, c = 0, d;    d = ++a && ++b || ++c;    printf("\n%d%d%d%d", a,  b, c, d);}

 

4、以下代码的输出结果是多少？

int main(){    char a[10][5];    printf("%p\n", a);    printf("%p\n", a[0]);    printf("%d", sizeof(a[1]));}

 

5、以下代码的输出结果是多少？

int main(){    char *a[1] = {
   "hello"};    printf("%s", a[0]);}

 

6、以下代码的输出结果是多少？

int main(){    char *a[2] = {
   "hello", "hi"};    printf("%d", sizeof(a));}

int main(){    char a[2][6] = {
   "hello", "hi"};    printf("%d", sizeof(a));}

int main() //{    char a[2][6] = {
   "hello", "hi"};    printf("%s", *a + 1);}

int main(){    char *a[2] = {
   "hello", "hi"};    printf("%s", *(a + 1));}

 

7、以下代码的输出结果是多少？

#include 
     
      struct student{    int no;    char name[20];};void main(){    student s;    s.name = "hello";    printf("hello");}
     

#include 
     
      struct student{    int no;    char name[20];};void main(){    student s;    printf("%s", s.name);}
     

#include 
     
      struct student{    int no;    char name[20];};struct student s;void main(){    s.no = 10;    printf("%s", s.name);}
     

 

8、以下代码的输出结果是多少？

#include 
     
      void (*(f)())(int, float);void (*(*x)())(int, float) = f;void ((*y)(int, float));void foo(int i, float f);int main(){    y = x();    y(1, 2);}void (*(f)())(int, float){    return foo;}void foo(int i, float f){    printf("%d %f\n", i, f);}
     

 

9、以下代码的输出结果是多少？

#include 
     
      void (*(f)())(int, float);typedef void (*(*x)())(int, float);void foo(int i, float f);int main(){    x = f;    x();}void (*(f)())(int, float){    return foo;}void foo(int i, float f){    printf("%d %f\n", i, f);}
     

 

10、以下代码的输出结果是多少？

#include 
     
      void (*(f)())(int, float);typedef void (*(*x)())(int, float);void foo(int i, float f);int main(){    x p = f;    p();}void (*(f)())(int, float){    return foo;}void foo(int i, float f){    printf("%d %f\n", i, f);}
     

 

11、以下代码的运行结果是多少？

struct S {    int i;    int * p;};void main(){    S s;    int * p = &s.i;    p[0] = 4;    p[1] = 3;    s.p = p;    s.p[1] = 1;    s.p[0] = 2;}

 

12、以下代码的输出结果是多少？

#include 
     
      struct marks {     int p:3;    int c:3;    int m:2;}; int main(){     struct marks s = {
   2, -6, 5};     printf("%d %d %d", s.p, s.c, s.m);    return 0; }
     

 

13、以下代码的输出结果是多少？

int main(){    int i;     float a = 5.2;    char *ptr;     ptr = (char *)&a;     for(i = 0; i <= 3; i++)         printf("%d ",*ptr++); }

int main(){    int i;     double a = 5.2;    char *ptr;     ptr = (char *)&a;     for(i = 0; i <= 7; i++)         printf("%d ",*ptr++); }

 

14、以下代码的输出结果是多少？

int main(){    printf("%s", "c" "question" "bank");}

int main(){    char *str = "c-pointer";     printf("%*.*s", 10, 7, str);}

int main(){    int a = -12;     a = a >> 3;     printf("%d",a);}

 

15、以下代码的输出结果是多少？

int extern x; int main() {    printf("%d", x);    x = 2;} int x=23;

 

16、以下代码的输出结果是多少？

#define message "union is \  power of c" int main(){     printf("%s",message); }

#define call(x) #xint main(){     printf("%s", call(c/c++));}

int main(){     if(printf("aaaaaaaa"))        printf("yes");     else         printf("no");}

 

17、以下代码的输出结果是多少？

#include 
     
      struct s1{    int a : 1;    int b : 1;};struct s2{    int a : 20;    int b : 12;};struct s3{    int a : 20;    int b : 13;};/*************/struct x1{    char a : 1;    int b : 1;};struct x2{    char a : 1;    int b : 8;};struct x3{    char a : 8;    int b : 32;};int main(){     printf("%d, %d, %d\n", sizeof(struct s1), sizeof(struct s2), sizeof(struct s3));    printf("%d, %d, %d\n", sizeof(struct x1), sizeof(struct x2), sizeof(struct x3)); }
     

 

18、以下代码的输出结果是多少？

#include 
     
      union u{    struct p    {        unsigned char x : 2;        unsigned int y : 2;    };    int x;};    int main(){    union u u;    u.p.x = 2;    printf("%d\n", u.p.x);}
     

#include 
     
      union u{    struct    {        unsigned char x : 2;        unsigned int y : 2;    }p;    int x;};    int main(){    union u u;    u.p.x = 2;    printf("%d\n", u.p.x);}
     

#include 
     
      union u{    struct    {        unsigned char x : 2;        unsigned int y : 2;    }p;    int x;};    int main(){    union u u.p.x = 2;    printf("%d\n", u.p.x);}
     

 

19、以下代码的输出结果是多少？

union u{    struct    {        unsigned char x : 2;        unsigned int y : 2;    }p;    int x;};    int main(){    union u u = {
   2};    printf("%d\n", u.p.x);}

 

20、以下代码的输出结果是多少？

struct p //{    unsigned int x : 2;    unsigned int y : 2;};    int main(){    struct p p;    p.x = 3;    p.y = 4;    printf("%d,%d\n", p.x, p.y);}

struct p{    unsigned int x : 7;    unsigned int y : 2;};    int main(){    struct p p;    p.x = 110;    p.y = 2;    printf("%d\n", p.x);}

 

21、指出下列程序在哪一行崩溃？

#include 
     
      struct MyStruct{    char c;    char *p;};using namespace std;int main(){    struct MyStruct s;    char *p=&s.c;    p[0] = 0;    p[1] = 1;    p[2] = 2;    p[3] = 3;    p[4] = 4;    p[5] = 5;    s.p=p;    s.p[0] = 5;    s.p[1] = 4;    s.p[2] = 3;    s.p[3] = 2;    s.p[4] = 1;    s.p[5] = 0;    for(int i = 0;i<5;i++)        cout << p[i] << " ";    return 1;}
     

 

22、以下代码的输出结果是多少？